Pulse Transmission Via Radiated Baseband Patents (Class 375/256)
  • Patent number: 10419072
    Abstract: Aspects of the subject disclosure may include, a communication device with a support structure having first and second annular contacts formed on an outer surface thereof, a first radio device having a first inner surface of a first housing opening with a third contact, and a second radio device having a second inner surface of a second housing opening with a fourth contact. The support structure is positioned in and passes through the first and second housing openings thereby positioning the first and second radio devices in a stacked arrangement, and, when in the stacked arrangement, the first and third contacts are aligned and the second and fourth contact are aligned to provide a coupling between the first and second radio devices. Other embodiments are disclosed.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: September 17, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Aldo Adriazola, Mitchell Harvey Fuchs, Robert Bennett, Brandon Pimm, Farhad Barzegar, Paul Shala Henry, Irwin Gerszberg, Thomas M. Willis, III, Donald J. Barnickel, Robert Roman
  • Patent number: 10419074
    Abstract: Aspects of the subject disclosure may include, a device having a non-conductive body with first and second ports that are electrically insulated from each other; a first antenna coupled to the first port; and a second antenna coupled to the second port. When the first and second ports are coupled to first and second transmission mediums, respectively: the first and second transmission mediums are electrically insulated from each other, a first electromagnetic wave conveying information and propagating along the first transmission medium causes the first antenna to transmit an RF signal to the second antenna, the RF signal conveys the information, the RF signal received at the second antenna causes a communication signal to be communicated via the second transmission medium, the communication signal conveys the information, and the first electromagnetic wave propagates along the first transmission medium without requiring an electrical return path. Other embodiments are disclosed.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 17, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Mark Neil Evans
  • Patent number: 10275761
    Abstract: An electronic device includes a housing, a conductive pattern that is arranged within the housing and is formed to generate a magnetic field, a plate that forms at least a part of a first surface of the housing and includes a material that at least partially transmits the magnetic field generated by the conductive pattern; and a control circuit that is configured to transmit at least one transaction information by using the conductive pattern. The conductive pattern includes a first coil that includes a plurality of first turns that are substantially parallel to a surface of the plate, and a second coil that includes a plurality of second turns that are substantially parallel to the surface of the plate. When viewed from the upper side of the plate, the first coil and the second coil may not at least partially overlap with each other.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: April 30, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-Sup Lee, Jae-Bong Chun, Hyun-Ju Hong, Jung-Sik Park
  • Patent number: 10269005
    Abstract: According to various embodiments of the present disclosure, an electronic device may include a housing, a conductive pattern that is arranged within the housing and is formed to generate a magnetic field, a plate that forms at least a part of a first surface of the housing and includes a material that at least partially transmits the magnetic field generated by the conductive pattern, and a communication circuit that is configured to transmit at least one transaction information to an external device by using the conductive pattern. The conductive pattern may include a first end that is electrically connected to the communication circuit, a second end that is electrically connected to the communication circuit, and a coil that is connected between the first end and the second end and includes a plurality of turns that are substantially parallel to a surface of the plate.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: April 23, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-Sup Lee, Hyun-Ju Hong, Youn-Ju Kim, Jae-Bong Chun, Jung-Sik Park
  • Patent number: 10128553
    Abstract: Aspects of the subject disclosure may include, for example, a transmission medium for propagating electromagnetic waves. The transmission medium can include a plurality of cores for selectively guiding an electromagnetic wave of a plurality of electromagnetic waves longitudinally along each core, and a shell surrounding at least a portion of each core for reducing exposure of the electromagnetic wave of each core. Other embodiments are disclosed.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: November 13, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Paul Shala Henry, William Scott Taylor, Robert Bennett, Farhad Barzegar, Irwin Gerszberg, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 9729937
    Abstract: Methods and systems capable of improving the transmission of data along an upstream path of a Hybrid Fiber-Coaxial Cable Network, from a transmitter in a node to a receiver in a Cable Modem Termination System.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 8, 2017
    Assignee: ARRIS Enterprises LLC
    Inventors: Robert J. Thompson, David C. Hartrum, Christopher Jeblonski, Rudolph J. Menna, John L. Moran
  • Patent number: 9621383
    Abstract: An isolator system has a transmitter configured to generate a first pair of buffered differential signals base based on an input signal; an isolation barrier having an input side coupled to the transmitter to receive the first pair of buffered differential signals, and an output side configured to provide a second pair of differential signals; and a receiver coupled to the output side of isolation barrier to receive the second pair of differential signals, wherein the receiver provides an output signal based on restoring the second pair of differential signals into a third pair of differential signals, wherein the output signal is converted from the third pair of differential signals and is a duplicate of the input signal with inherited propagation delays.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: April 11, 2017
    Assignee: MONOLITHIC POWER SYSTEMS, INC.
    Inventor: Joseph Urienza
  • Patent number: 9311587
    Abstract: An RFID device (100) being operable in a first and a second operating state, the RFID device comprises a control unit (102), wherein the control unit comprises a configuration input terminal for receiving a configuration signal, and a processing unit (101), which is coupled to the control unit, wherein the control unit is adapted for switching the processing unit between the first and the second operating state based on the configuration signal, wherein the control unit (102) comprises an activation input terminal for receiving an activation signal.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: April 12, 2016
    Assignee: NXP B.V.
    Inventor: Anton Salfelner
  • Patent number: 9106213
    Abstract: A bit generation apparatus includes a glitch generation circuit that generates glitch signals which include a plurality of pulses, and T-FF bit generation circuits which input the glitch signals, and based on either rising edges or falling edges of the plurality of pulses included in the glitch signals, generate a bit value of either 0 or 1. Each of the T-FF bit generation circuits generates a respective bit value based on either the parity of the number of rising edges or the parity of the number of falling edges of the plurality of pulses. As a result of employment of the T-FF bit generation circuits, circuits that are conventionally required but not essential for the glitch become unnecessary. This serves to prevent expansion in circuit scale and increase in processing time of bit generation for the bit generation circuit.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: August 11, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Shimizu, Daisuke Suzuki, Tomomi Kasuya
  • Publication number: 20150092867
    Abstract: A device receives ASK signals by using an ASK signal receiving circuit that is different from an ASK signal receiving circuit for R/W mode, when an NFC-enabled semiconductor device operates in a mode other than the R/W mode. An ASK signal receiving circuit for 100% ASK is provided on the side of a pair of transmitting terminals. This arrangement eliminates the influence of an ESD provided within an ASK signal receiving circuit for 10% ASK coupled to a pair of receiving terminals. There is no need for management of threshold values that are different according to type of ASK and it is possible to support different modulation schemes by a smaller circuit configuration.
    Type: Application
    Filed: December 9, 2014
    Publication date: April 2, 2015
    Inventor: Takayuki Tsukamoto
  • Patent number: 8995908
    Abstract: A communications system may include a communications device including a first Bluetooth transceiver. The first Bluetooth transceiver may comprise a clock. The first Bluetooth transceiver may be capable of scanning a plurality of different operating frequencies for a pairing request based upon the clock. The communications device may further include an output device coupled with the Bluetooth transceiver and capable of outputting data associated with the clock via a communications path different than Bluetooth. The system may also include a mobile communications device including an input device capable of receiving the clock data from the output device via the communications path, and a second Bluetooth transceiver coupled with the input device and capable of generating the pairing request based upon the received clock data.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: March 31, 2015
    Assignee: BlackBerry Limited
    Inventors: Justin Manuel Pedro, Marin Blazevic, Xianfeng Chen, Dong Duc Hai Nguyen
  • Patent number: 8989303
    Abstract: An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: March 24, 2015
    Assignee: Massachusetts Institute of Technology
    Inventor: William J. Dally
  • Publication number: 20150078461
    Abstract: The present specification discloses as one embodiment a power receiver for transmitting a message by using a power transmission signal. The power receiver comprises: a power reception portion for receiving the wireless power signal that is formed by a power transmitter; a demodulation portion for demodulating the received wireless power signal; a modulation portion for modulating the received wireless power signal; and a control portion for decoding a first packet from the wireless power signal that is demodulated by means of the demodulation portion, for determining whether a second packet that does not collide with the first packet which has been decoded can be transmitted, and for modulating the received wireless power signal so as to comprise the second packet by controlling the modulation portion, when transmission is possible according to the result of the determination.
    Type: Application
    Filed: July 21, 2011
    Publication date: March 19, 2015
    Applicant: LG ELECTRONICS INC.
    Inventors: Jaesung Lee, Inchang Chu, Jeongkyo Seo
  • Publication number: 20150063472
    Abstract: A bridged wireless communication system includes a user device that is configured to perform wireless communications natively using a second wireless technology, and a wireless technology bridging system chassis such as, for example, a user device case, coupled to the user device. The wireless technology bridging system chassis houses a first technology wireless controller that is configured to perform wireless communications using a first wireless technology that is different from the second wireless technology, and a second technology wireless controller that is configured to perform wireless communications using the second wireless technology.
    Type: Application
    Filed: August 28, 2013
    Publication date: March 5, 2015
    Inventor: Geoffrey W. Chatterton
  • Patent number: 8971421
    Abstract: A millimeter wave wireless (M2W2) interconnect is used for transmitting and receiving signals at millimeter-wave frequencies for short-range wireless communication with high data rate capability. The transmitter and receiver antennae may comprise an on-chip differential dipole antenna or a bond-wire differential dipole antenna. The bond wire differential dipole antenna is comprised of a pair of bond wires connecting between a pair of pads on an integrated circuit (IC) die and a pair of floating pads on a printed circuit board (PCB).
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: March 3, 2015
    Assignee: The Regents of the University of California
    Inventors: Sai-Wang Tam, Mau-Chung F. Chang
  • Patent number: 8948299
    Abstract: A communication device includes: a converting part converting a data signal from a non-return-to-zero signal to a return-to-zero signal; a trigger flip-flop inverting an output signal every time the return-to-zero signal changes in one cycle; a first filter outputting a positive pulse and a negative pulse alternately, which indicate existence and absence of the pulse corresponding to a value of the data signal, by removing a low frequency component of an output signal of the trigger flip-flop.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: February 3, 2015
    Assignee: Fujitsu Limited
    Inventors: Yasuhiro Nakasha, Hiroki Hayashi, Takumi Itoh
  • Publication number: 20150010092
    Abstract: A signal transmission system and a signal transmission circuit are provided. The system includes a first chip and a second chip. A rising pulse signal (RPS) and a falling pulse signal (FPS) are generated by a transmission module on the first chip in response to a waveform of an input signal.
    Type: Application
    Filed: October 15, 2013
    Publication date: January 8, 2015
    Applicant: I-SHOU UNIVERSITY
    Inventors: Chun-Wei Huang, Yu-Jung Huang, Ming-Kun Chen
  • Patent number: 8923444
    Abstract: A receiver for decoding a communication signal is disclosed. The receiver includes an input port and a filter. The input port receives the communication signal from a communication medium. The communication signal comprises a sequence of symbols. Each symbol of the symbol sequence is an analog pulse that has a leading edge of exponential shape. The exponential shape has an exponential growth parameter value that has been selected from values ?0 and ?1, which are distinct positive values. For each symbol of the symbol sequence, the exponential growth parameter value for the leading edge of the symbol has been selected based on a corresponding bit from a stream of information bits. The filter receives the communication signal from the input port and filters the communication signal to obtain an output signal. The transfer function of the filter has one or more zeros at ?0.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: December 30, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventor: Robert H. Flake
  • Patent number: 8923433
    Abstract: An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: December 30, 2014
    Assignee: Massachusetts Institute of Technology
    Inventor: William J. Dally
  • Patent number: 8902998
    Abstract: The invention relates to a receiver for a near-field chip-to-chip multichannel transmission system such as the capacitive or inductive links used for vertical signal transmission between the stacked chips of a system-in-package. A receiver for near-field chip-to-chip multichannel transmission providing 4 transmission channels for digital transmission between two monolithic integrated circuits comprises 4 coupling devices (211) (212) (213) (214), each of said coupling devices being a planar winding sensitive to magnetic field variations. A multiple-input-port and multiple-output-port amplifier (23) has 4 input ports, each of said input ports being connected to one and only one of said coupling devices (211) (212) (213) (214).
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: December 2, 2014
    Assignee: Apple Inc.
    Inventors: Frederic Broyde, Evelyne Clavelier
  • Patent number: 8897342
    Abstract: A master modem is configured to generate a carrier signal for transmission over a wired connection. A slave modem is configured to change an impedance of the wired connection to alter generation of the carrier signal by the master modem. The impedance of the wired connection is changed based on data to be provided by the slave modem. The master modem can demodulate its own carrier signal to obtain the data provided by the slave modem. The impedance of the wired connection could be changed by changing an impedance of a transformer winding or inductor of the slave modem, where the transformer winding or inductor is coupled to the wired connection. The impedance of the wired connection could also be changed by changing a reactance of a circuit coupled to the wired connection.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: November 25, 2014
    Assignee: National Semiconductor Corporation
    Inventors: Lawrence H. Zuckerman, Perry I. Tsao, Thomas Yang, Keiichi McGuire, Chenguang Gong, Ravichander Bairi
  • Patent number: 8873614
    Abstract: A system including a storage medium, a demodulator, and a decoder. The demodulator is configured to receive an input signal from the storage medium and demodulate the input signal. The decoder is configured to estimate data stored in the storage medium by decoding the demodulated input signal to provide an output signal. The decoder includes a filter and first and second processors. The filter is configured to generate a first equalized signal based on the output signal. The first processor is configured to, based on the first equalized signal and a first Viterbi algorithm, generate a first estimate of the data and an estimate of noise. The second processor is configured to generate a second estimate of the data based on the first estimate of the data, the estimate of the noise, and a second Viterbi algorithm. The output signal includes the second estimate of the data.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: October 28, 2014
    Assignee: Marvell International Ltd.
    Inventors: Hongwei Song, Zining Wu, Shaohua Yang
  • Patent number: 8867657
    Abstract: A first transmitter transmits symbols. The leading edge of each symbol has the form Djexp{?jt}, where Dj is real, where ?j is selected from N possible values based on a current group of bits. The receiver has N filters whose transfer functions correspond respectively to the N possible values. The filter outputs are used to recover the group of bits. A second transmitter transmits an exponential symbol or a zero symbol depending on a current bit to be transmitted. The zero symbol has zero amplitude over the symbol period. The corresponding receiver applies threshold detection to estimate the transmitted bits. A third transmitter transmits a sequence of analog pulses with known interpulse time separation(s). The pulse sequence reflects from a moving object. A receiver captures the reflected pulse sequence. The interpulse separation(s) of the reflect pulse sequence is used to determine the radial velocity of the object.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: October 21, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventor: Robert H. Flake
  • Publication number: 20140269946
    Abstract: A system for a baseband near field magnetic stripe data transmitter includes a mobile phone and a magnetic stripe transmission (MST) device. The mobile phone transmits a stream of pulses including magnetic stripe data of a payment card. The magnetic stripe transmission (MST) device includes a wave shaper, a driver and an induction device. The MST device receives the stream of pulses from the mobile phone, shapes and amplifies the received stream of pulses and generates and emits high energy magnetic pulses including the magnetic stripe data. The emitted high energy magnetic pulses are picked up remotely by a magnetic read head. The MST device shapes the stream of pulses to compensate for shielding, eddy current losses and limited inductance value of the magnetic read head.
    Type: Application
    Filed: February 17, 2014
    Publication date: September 18, 2014
    Inventor: GEORGE WALLNER
  • Patent number: 8817891
    Abstract: A millimeter wave wireless (M2W2) interconnect is used for transmitting and receiving signals at millimeter-wave frequencies for short-range wireless communication with high data rate capability. The transmitter and receiver antennae may comprise an on-chip differential dipole antenna or a bond wire differential dipole antenna. The bond wire differential dipole antenna is comprised of a pair of bond wires connecting between a pair of pads on an integrated circuit (IC) die and a pair of floating pads on a printed circuit board (PCB).
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: August 26, 2014
    Assignee: The Regents of the University of California
    Inventors: Sai-Wang Tam, Mau-Chung Frank Chang
  • Publication number: 20140211862
    Abstract: A USB isolator integrated circuit, including: an isolation barrier disposed between an upstream portion and a downstream portion of the integrated circuit to provide galvanic isolation therebetween; a first USB 2.0 interface configured to receive and transmit USB 2.0 compliant signals between the upstream portion of the integrated circuit and an upstream USB entity; a second USB 2.0 interface configured to receive and transmit USB 2.0 compliant signals between the downstream portion of the integrated circuit and a downstream USB entity; a plurality of signal coupling components configured to allow communication between the upstream portion and the downstream portion of the integrated circuit to allow the upstream USB entity and the downstream USB entity to communicate therebetween using a USB 2.0 protocol while maintaining the galvanic isolation therebetween; and the upstream and downstream portions of the integrated circuit including respective modules configured to automatically detect a USB 2.
    Type: Application
    Filed: May 25, 2012
    Publication date: July 31, 2014
    Applicant: The Silanna Group Pty Ltd.
    Inventors: Yashodhan Vijay Moghe, James Brinkhoff
  • Patent number: 8761235
    Abstract: An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer using signal levels in sequences to represent different frequencies.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: June 24, 2014
    Assignee: Massachusetts Institute of Technology
    Inventor: William J. Dally
  • Patent number: 8743985
    Abstract: Techniques for a precoding scheme for wireless communications are described. A method and apparatus may comprise a first device for a communications system to determine a beamforming structure for a closed loop transmit beamforming scheme using channel information, one or more scaling factors and one or more integers to represent a complex vector. The beamforming structure may include a codeword, a codebook and a codeword index. Other embodiments are described and claimed.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 3, 2014
    Assignee: Intel Corporation
    Inventors: Qinghua Li, Shanshan Zheng, Hongming Zheng, Guangjie Li, Senjie Zhang, Alexei Davydov
  • Publication number: 20140146897
    Abstract: A torque measurement system that includes a rotor device and a stator device can perform automatic tuning to improve the initial tuning performed during design and assembly. The stator device can include a variable capacitive element and a micro-controller configured to adjust a capacitance value of the variable capacitive element. Additionally or alternatively, the rotor device can include a variable capacitive element and a micro-controller configured to adjust a capacitance value of the variable capacitive element. The adjustment of the capacitive elements can be based on the quality of signal detected at either the rotor device or stator device.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 29, 2014
    Applicant: Honeywell International Inc.
    Inventors: Vishal Malhan, Gourango Biswas, Narayan Singh Rana, Gautham Ramamurthy, Balaji Mahadev
  • Patent number: 8737532
    Abstract: A method and apparatus for adjusting a sample rate for an asynchronous sample rate converter is disclosed. In one embodiment, an apparatus includes an asynchronous sample rate converter (ASRC) that is configured to receive a digital data stream provided at a first sample rate. The ASRC is configured to convert the digital data stream to a second sample rate at which it is output. The apparatus also includes a sample rate estimator coupled to an interface through which samples from the digital data stream are conveyed subsequent to conversion to the second sample rate. The sample rate estimator is further coupled to the ASRC, and configured to adjust the second sample rate based on information obtained from the interface.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: May 27, 2014
    Assignee: Silicon Laboratories Inc.
    Inventors: Brian Green, Javier Elenes
  • Publication number: 20140133584
    Abstract: A communications establishing method for a Bluetooth system includes: setting a first Bluetooth apparatus to use an out-of-band channel to pair with a second Bluetooth apparatus when the second Bluetooth apparatus intends to pair with the first Bluetooth apparatus; and enabling an enhanced page-scanning mechanism in the first Bluetooth apparatus to scan a channel used by the second Bluetooth apparatus for transmitting an ID packet of the second Bluetooth apparatus when the first Bluetooth apparatus is paired with the second Bluetooth apparatus via the out-of-band channel.
    Type: Application
    Filed: August 2, 2013
    Publication date: May 15, 2014
    Applicant: MEDIATEK INC.
    Inventors: Wei-Kun Su, Huanchun Ye
  • Patent number: 8718201
    Abstract: Techniques are provided for a demodulation and decoding method and apparatus for a given user equipment device to receive a one or more Orthogonal Frequency Division Multiplex (OFDM) symbols over a control channel, where the OFDM symbols comprise a plurality of resource element groups distributed in time and frequency that are combined to form control channel elements. Those resource element groups that form specific control channel elements for the user equipment device and those resource element groups that form common control channel elements for one or more user equipment devices including the given user equipment device are identified. The resource element groups that form the specific control channel elements and the resource element groups that form the common control channel elements are demodulated to generate encoded control messages comprising one or more control channel elements.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: May 6, 2014
    Assignees: MStar Semiconductor, Inc., MStar Software R&D (Shenzhen) Ltd., MStar France SAS, MStar Semiconductor, Inc.
    Inventors: Richard A. Lane, Mark B. Murphy, Cyril Valadon
  • Patent number: 8705634
    Abstract: A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses baseband signal samples resulting from analog to digital conversion of a received analog signal followed by digital downconversion. The compressed signal samples are transferred over the serial data link to the baseband processor then decompressed prior to normal signal processing. For the downlink, the baseband processor compresses baseband signal samples and transfers the compressed signal samples to the RF unit. The RF unit decompresses the compressed samples prior to digital upconversion and digital to analog conversion to form an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems, including OBSAI or CPRI compliant systems.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: April 22, 2014
    Assignee: Integrated Device Technology, Inc.
    Inventor: Albert W Wegener
  • Patent number: 8699607
    Abstract: A receiver for receiving signals of a protocol in which traffic data is redundantly modulated onto both of two carriers according to a predetermined decision scheme, the receiver comprising: an input for receiving signals on the two carriers; a demodulator for demodulating the signals received on each of the two carriers to form two respective received data streams; first transformation logic for generating a first candidate set of traffic data by processing the received data streams by the functional inverse of the predetermined decision scheme; second transformation logic for generating a second candidate set of traffic data by aggregating corresponding bits of each of the received data streams; and a traffic data set selector for selecting data from either the first candidate set of traffic data or from the second candidate set of traffic data for further processing, the traffic data set selector being configured to make that selection in dependence on the relative strength with which signals on the two ca
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: April 15, 2014
    Assignee: Cambridge Silicon Radio Limited
    Inventor: Olivier Bernard Andre Seller
  • Publication number: 20140086345
    Abstract: A near field wireless communication apparatus using a magnetic coupling to transmit data or clock information with low power and high efficiency is provided. Thus, when data to be transmitted is “1,” the near field wireless communication apparatus modulates the data into a pulse signal and transmits the pulse signal, and when the data is “0,” the near field wireless communication apparatus does not generate a signal at all.
    Type: Application
    Filed: August 16, 2013
    Publication date: March 27, 2014
    Applicants: Korea Advanced Institute of Science and Technology, Samsung Electronics Co., Ltd.
    Inventors: Jae-Young HUH, Hoi-Jun Yoo, Dong-Churl Kim, Kyu-Sub Kwak, Jea-Hyuck Lee, Hyun-Woo Cho, Tae-Hwan Roh, Un-Soo Ha
  • Patent number: 8681837
    Abstract: An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to emphasize transition signal levels relative to repeated signal levels. The preferred equalizer includes an FIR transition filter using a look-up table. Parallel circuits including FIR filters and digital-to-analog converters provide a high speed equalizer with lower speed circuitry. The equalizer is particularly suited to in-cabinet and local area network transmissions where feedback circuitry facilitates adaptive training of the equalizer as logic level sequences are transmitted at different frequencies.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: March 25, 2014
    Assignee: Massachusetts Institute of Technology
    Inventor: William J. Dally
  • Patent number: 8675781
    Abstract: Wireless communication is ubiquitous today and deployments are growing rapidly leading to increased interference, increasing conflicts, etc. As a result monitoring the wireless environment is increasingly important for regulators, service providers, Government agencies, enterprises etc. Such monitoring should be flexible in terms of the networks being monitored within the wireless environment but should also provide real-time monitoring to detect unauthorized transmitters, provide dynamic network management, etc. Accordingly, based upon embodiments of the invention, a broadband, real-time signal analyzer (RTSA) circuit that allows for the deployment of RTSA devices in a distributed environment wherein determination of policy breaches, network performance, regulatory compliance, etc. are locally determined and exploited directly in network management or communicated to the central server and network administrators for subsequent action.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: March 18, 2014
    Assignee: ThinkRF Corporation
    Inventors: Nikhil Adnani, Gilbert Brunette, Tim Hember
  • Patent number: 8675798
    Abstract: Systems, methods, and circuits provide phase inversion of a clock signal. A first clock signal is received. A phase inversion signal indicates the existence of a 180 degree phase difference between the first clock signal and a second clock signal. As a result of the phase inversion signal indicating the 180 degree phase difference, the system, methods and circuits adapt the first clock signal by extending the first clock signal by a phase such that the first clock signal's rising edges and falling edges align with the second clock signal's rising edges and falling edges. As a result, the 180 degree phase difference between the clock signals is eliminated.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: March 18, 2014
    Assignee: NetLogic Microsystems, Inc.
    Inventor: Dimitri Argyres
  • Patent number: 8670491
    Abstract: A device and method for time synchronization in a communication network, wherein a virtual clock is produced by a controller in each network node based on the PROFINET-Standard and/or the Precision Transparent Clock Protocol. In contrast to known methods for estimating the time, the time of the virtual clock does not undergo sudden changes. The virtual clock includes a controlled, continuous path. As a result, the virtual clock is particularly suitable for time-critical applications. Here, the estimation of the time of a reference clock is improved by 18-35%. Accordingly, a markedly greater number of network nodes may be synchronized with a predetermined level of accuracy for the time synchronization.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: March 11, 2014
    Assignee: Siemens AG
    Inventors: Chongning Na, Dragan Obradovic, Ruxandra Scheiterer, Guenter Steindl, Philipp Wolfrum
  • Publication number: 20140056368
    Abstract: Provided is a contactless communication system in which each device performing communication in the system includes a dipole antenna having a length which is less than half of wavelength of a clock frequency of digital baseband signals which are communicated. The dipole antennas are disposed in opposing positions to one another. The contactless communication system performs short distance contactless communication of the digital baseband signals using a frequency band which does not include a resonant frequency of the dipole antennas.
    Type: Application
    Filed: November 12, 2012
    Publication date: February 27, 2014
    Applicant: Panasonic Corporation
    Inventors: Takeshi Nakayama, Hiroshi Suenaga, Tsutomu Sakata
  • Patent number: 8630357
    Abstract: This invention relates to capturing and processing the full bandwidth of an Ultra-Wideband (UWB) signal. An incoming UWB signal is processed in two different analog signal bands in parallel and their magnitudes summed to facilitate a Field programmable gate array (FPGA) processing of the entire UWB bandwidth to minimize digital implementation loss and promote a higher range.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: January 14, 2014
    Assignee: ABG Tag & Traq, LLC
    Inventors: Mark A. Chivers, Sujit Ravindran
  • Patent number: 8594228
    Abstract: A balanced transmitter up-converts I and Q baseband signals directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the I and Q baseband signals in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains necessary information to reconstruct the I and Q baseband signals. The differential sampling is performed according to control signals that are phase shifted with respect to each other. The control signals may have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: November 26, 2013
    Assignee: ParkerVision, Inc.
    Inventors: David F. Sorrells, Michael J. Bultman, Robert W. Cook, Richard C. Looke, Charley D. Moses, Jr., Gregory S. Rawlins, Michael W. Rawlins
  • Patent number: 8571135
    Abstract: A balanced transmitter up-converts a baseband signal directly from baseband-to-RF. The up-conversion process is sufficiently linear that no IF processing is required, even in communications applications that have stringent requirements on spectral growth. In operation, the balanced modulator sub-harmonically samples the baseband signal in a balanced and differential manner, resulting in harmonically rich signal. The harmonically rich signal contains multiple harmonic images that repeat at multiples of the sampling frequency, where each harmonic contains the necessary information to reconstruct the baseband signal. The differential sampling is performed according to a first and second control signals that are phase shifted with respect to each other. In embodiments of the invention, the control signals have pulse widths (or apertures) that operate to improve energy transfer to a desired harmonic in the harmonically rich signal.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: October 29, 2013
    Assignee: ParkerVision, Inc.
    Inventors: David F. Sorrells, Michael J. Bultman, Robert W. Cook, Richard C Looke, Charley D. Moses, Jr., Gregory S. Rawlins, Michael W. Rawlins
  • Patent number: 8559531
    Abstract: An apparatus for serial communication using embedded clock signals is presented. The apparatus includes a clock-embedded signal generator for generating a data signal and a data-bar signal displaying a data stream according to relative positions and, when an external clock is input, generating a clock-embedded data signal and a clock-embedded data-bar signal by equalizing the data signal and the data-bar signal. The apparatus also includes a clock-embedded signal recovery unit for recovering the data signal and the data-bar signal according to relative positions of the clock-embedded data signal and the clock-embedded data-bar signal, and recovering synchronization information of the clock by detecting when the clock-embedded data signal and the clock-embedded data-bar signal are equalized. A method for serial communication using embedded clock signals is also presented.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: October 15, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Keun Lee
  • Publication number: 20130259143
    Abstract: Methods and systems for receiving in-phase and quadrature (I and Q) radio frequency (RF) signals without a phase shifter utilizing a leaky wave antenna are disclosed and may include generating in-phase and quadrature signals using a leaky wave antenna coupled to one or more low-noise amplifiers (LNAs) on a chip and without a phase shifter. The RE I and Q signals may be communicated from the single leaky wave antenna using coplanar feed points and/or feed points on a top surface and a bottom surface of the single leaky wave antenna. The leaky wave antennas may be integrated on the chip, on a package to which the chip is affixed, and/or on a printed circuit board to which the chip is affixed. The RF I and Q signals may be amplified by the one or more LNAs and may down-convert the RF I and Q signals to baseband signals.
    Type: Application
    Filed: May 31, 2013
    Publication date: October 3, 2013
    Inventors: Ahmadreza Rofougaran, Maryam Rofougaran
  • Patent number: 8532235
    Abstract: An ultra-wideband (UWB) delay and multiply receiver is formed of a receive antenna; a variable gain attenuator connected to the receive antenna; a signal splitter connected to the variable gain attenuator; a multiplier having one input connected to an undelayed signal from the signal splitter and another input connected to a delayed signal from the signal splitter, the delay between the splitter signals being equal to the spacing between pulses from a transmitter whose pulses are being received by the receive antenna; a peak detection circuit connected to the output of the multiplier and connected to the variable gain attenuator to control the variable gain attenuator to maintain a constant amplitude output from the multiplier; and a digital output circuit connected to the output of the multiplier.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: September 10, 2013
    Assignee: Lawrence Livermore National Security, LLC.
    Inventors: Gregory E. Dallum, Garth C. Pratt, Peter C. Haugen, Carlos E. Romero
  • Publication number: 20130230082
    Abstract: In a Near Field Communications (NFC) link, the data link turn-around time is adjusted to optimize battery use while maximizing the data throughput. A receiving device immediately transmits any pending high priority control or data messages in its own queue in response to a message from the sending device, subject to the flow control status of the sending device. The value of the delay time before sending a SYMM primitive is selected in accordance with the types of link frames recently received.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 5, 2013
    Inventor: Miller T. Abel
  • Patent number: 8520613
    Abstract: Techniques for optimizing presence information update requests for wireless devices on a wireless communication network by reducing the amount of access-network resources are provided. In an exemplary embodiment, presence information updates can be optimized by a presence module that is a single point of contact on a mobile device for presence requests from presence aware applications.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: August 27, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Mark A. Maggenti, Harleen K. Gill, Mohammed Ataur Rahman Shuman
  • Publication number: 20130215980
    Abstract: The invention relates to a receiver for a near-field chip-to-chip multichannel transmission system such as the capacitive or inductive links used for vertical signal transmission between the stacked chips of a system-in-package. A receiver for near-field chip-to-chip multichannel transmission providing 4 transmission channels for digital transmission between two monolithic integrated circuits comprises 4 coupling devices (211) (212) (213) (214), each of said coupling devices being a planar winding sensitive to magnetic field variations. A multiple-input-port and multiple-output-port amplifier (23) has 4 input ports, each of said input ports being connected to one and only one of said coupling devices (211) (212) (213) (214).
    Type: Application
    Filed: May 24, 2011
    Publication date: August 22, 2013
    Inventors: Frederic Broyde, Evelyne Clavelier
  • Publication number: 20130215979
    Abstract: Described herein are methods of making and using and apparatus for wirelessly communicating data and providing power, particularly from a location exterior to a body and to an implantable device disposed within a body with tissue. The described embodiments provide apparatus and methods for efficiently transfer data and power between an external transceiver and an (implanted) biomedical device. The method is to modulate power carrier, which wirelessly powers the device, using an asynchronous modulation scheme, such as amplitude shift keying (ASK) modulation, with minimal modulation depth in order to not disrupt the power flow. The digital data is encoded in the pulse width, eliminating the need for synchronization to the power carrier signal and further minimizing the power consumption necessary for data transfer. Additionally, a reverse backscatter method for obtaining data from the implant is described that has flexible, low power operation.
    Type: Application
    Filed: January 4, 2013
    Publication date: August 22, 2013
    Applicant: The Board of Trustees of The Leland Stanford Junior University
    Inventor: The Board of Trustees of The Leland Stanford Junior University