Having Specific Code Acquisition Or Tracking Patents (Class 375/134)
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Patent number: 8964811Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.Type: GrantFiled: February 18, 2014Date of Patent: February 24, 2015Assignee: Comtech EF Data Corp.Inventors: Michael Beeler, Cris M. Mamaril, Jeffery Harig
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Patent number: 8948229Abstract: In one embodiment, a device in a channel hopping communication network independently maintains a slot counter, and computes a channel identification (ID) based on a function having inputs of i) a unique feature of the device, ii) a current slot of the slot counter, and iii) a set of possible channel IDs. Accordingly, the device configures its radio to receive on the computed channel ID for the respective current slot. In another embodiment, the device may determine, for a neighbor device, a current neighbor slot and unique neighbor feature, and correspondingly computes a neighbor channel ID based on the function using the unique neighbor feature, the current neighbor slot, and the set of possible channel IDs. As such, the device configures its radio to transmit on the computed neighbor channel ID for the respective current neighbor slot.Type: GrantFiled: October 13, 2011Date of Patent: February 3, 2015Assignee: Cisco Technology, Inc.Inventors: Jonathan W. Hui, Jean-Philippe Vasseur
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Publication number: 20150023395Abstract: A wireless communication system in which a master device and a slave device each performing wireless communication by a frequency hopping system can operate in synchronism with each other. In the master device, a master microcomputer outputs a first sync signal to a RTC unit after a transmission timing signal is received and a carrier frequency is changed a predetermined number of times according to a first change timing signal. In the slave device, a slave microcomputer outputs a second sync signal to a RTC unit after a reception timing signal is received and a carrier frequency is changed the predetermined number of times according to a second change timing signal.Type: ApplicationFiled: December 27, 2012Publication date: January 22, 2015Applicant: CANON KABUSHIKI KAISHAInventor: Kei Tohyama
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Patent number: 8923417Abstract: Embodiments disclosed herein relate to apparatus and methods of transceiver power noise reduction. One embodiment relates to a method of serial data communication. At a transmitter, data may be encoded by a communication protocol encoder, and the protocol-encoded data may be serialized. The serialized data may be encoded for power-delivery-network noise reduction (PNR) so as to generate PNR-encoded serial data, and the PNR-encoded serial data may be driven onto a communication channel. Other embodiments, aspects, and features are also disclosed.Type: GrantFiled: January 12, 2012Date of Patent: December 30, 2014Assignee: Altera CorporationInventors: Zhe Li, Hong Shi
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Patent number: 8917757Abstract: A video processing device operates in an encoding mode when a mode selection signal has a first value and operates in a decoding mode when the mode selection signal has a second value. The encoding mode utilizes a plurality of function specific hardware engines that each perform a specific coding function and the decoding module utilizes at least one of the plurality of hardware engines.Type: GrantFiled: January 9, 2014Date of Patent: December 23, 2014Assignee: ViXS Systems, Inc.Inventors: Eric Young, Edward Hong
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Patent number: 8908621Abstract: In one embodiment, each device in a frequency hopping communication network operates according to a common broadcast schedule for the network that simultaneously overlays a configured portion of all independently determined unicast listening schedules in the network, wherein the overlaid configured portion is based on broadcast schedule parameters consisting of a first time spent for broadcast transmissions in each broadcast period and a second time between broadcast periods. By monitoring network characteristics relating to unicast traffic and broadcast traffic in the network, updated broadcast schedule parameters may then be determined based on the network characteristics. Operation of the common broadcast schedule may thus be updated with the updated broadcast schedule parameters, accordingly.Type: GrantFiled: July 22, 2011Date of Patent: December 9, 2014Assignee: Cisco Technology, Inc.Inventors: Jean-Philippe Vasseur, Jonathan W. Hui
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Patent number: 8873602Abstract: The present invention discloses a method and a device for transmitting sounding reference signal in a multi-antenna system, wherein the method includes acquiring antenna grouping information, and grouping antennas according to the antenna grouping information; and transmitting SRS on the respective antennas, wherein different antenna groups transmit the SRS in different frequency bands at a same moment. With the present invention, the interference with a base station of an adjacent cell in a certain frequency band is enabled to be reduced.Type: GrantFiled: October 16, 2012Date of Patent: October 28, 2014Assignee: Huawei Technologies Co., Ltd.Inventors: Mingyu Zhou, Sha Ma
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Patent number: 8867650Abstract: An apparatus and method for cross clock domain interference cancellation is provided to a communication system which includes a transmitter operated in a first clock domain and a receiver operated in a second clock domain. The apparatus comprises a First-In-First-Out (FIFO) circuit and a cancellation signal generator. The FIFO circuit receives a digital transmission signal of the transmitter in the first clock domain, and outputs the digital transmission signal in the second clock domain according to an accumulated timing difference between the first and second clock domains. The cancellation signal generator generates a cancellation signal for canceling an interference signal received by the receiver according to the digital transmission signal outputted by the FIFO circuit. The interference signal is generated in response to the digital transmission signal.Type: GrantFiled: February 14, 2012Date of Patent: October 21, 2014Assignee: Realtek Semiconductor Corp.Inventors: Liang-Wei Huang, Shieh-Hsing Kuo, Chi-Shun Weng, Chun-Hung Liu
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Patent number: 8848761Abstract: Methods and User Equipment (UE) apparatuses are provided for transmitting Reference Signals (RSs). A method includes receiving a cell-specific sequence-hopping parameter; receiving a UE-specific sequence-hopping parameter; determining a reference signal sequence based on the UE-specific sequence-hopping parameter; and transmitting the reference signal based on the determined reference signal sequence. Sequence hopping does not apply to the reference signal sequence if the cell-specific sequence-hopping parameter indicates that the sequence hopping is enabled and the UE-specific sequence-hopping parameter indicates that the sequence hopping is disabled.Type: GrantFiled: June 18, 2013Date of Patent: September 30, 2014Assignee: Samsung Electronics Co., LtdInventors: Aris Papasakellariou, Joon Young Cho
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Publication number: 20140269842Abstract: Systems, methods, and devices of the various embodiments provide modified frequency hopping patterns that enable synchronization of a wireless tracking device with a beacon signal that defines a predetermined area (i.e., beacon fence). In an embodiment, a beacon may transmit a beacon signal according to a modified frequency hopping pattern and a wireless tracking device may receive the beacon signal by tuning a receiver according to the frequency hopping pattern. In an embodiment, the modified frequency hopping pattern may include a reference frequency generated at a high redundancy pattern multiplexed with a pseudo random sequence of frequencies. In an embodiment, the packets of the beacon signal transmitted at the reference frequency may include an indication of the next frequency according to the modified frequency hopping pattern.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: QUALCOMM INCORPORATEDInventors: Catalin LACATUS, Hemish K. PARIKH, Harleen K. GILL
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Patent number: 8837557Abstract: Techniques for use in sampling a signal of a receiver are described. In a sampling determination mode, a signal is sampled at a first sampling period for producing a sample set for each phase of the sampled signal. For each sample set, a correlation process is performed for producing a correlation result. One of the phases associated with an optimal correlation result is identified from the correlation results. In a communication mode, a received signal is sampled at a second sampling period at the phase associated with the optimal correlation result, for recovering user or signaling information from the received signal. The second sampling period is less than the first sampling period.Type: GrantFiled: December 10, 2012Date of Patent: September 16, 2014Assignee: BlackBerry LimitedInventor: Xin Jin
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Patent number: 8831066Abstract: A method of generating a pair of orthogonal sets with a spreading factor N for a direct sequence spread spectrum communication system, includes selecting a two-level autocorrelation sequence of a period of N?1, the two-level autocorrelation sequence including elements, each of which includes a value of 1 or 0, and obtaining binary sequences based on the two-level autocorrelation sequence. The method further includes obtaining quasi-orthogonal sets based on the two-level autocorrelation sequence and the binary sequences, and generating the pair of the orthogonal sets based on the quasi-orthogonal sets.Type: GrantFiled: September 23, 2013Date of Patent: September 9, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Sujit Jos, Jinesh P. Nair
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Patent number: 8831064Abstract: A method of generating a spread spectrum clock signal in an integrated circuit, the method comprising providing a programmable digital clock generator in programmable logic of the integrated circuit, coupling a user-programmable control signal to the programmable clock generator to control the frequency deviation of the spread spectrum clock signal, and generating the spread spectrum clock signal in response to the user-programmable control signal.Type: GrantFiled: June 13, 2007Date of Patent: September 9, 2014Assignee: Xilinx, Inc.Inventor: Alireza S. Kaviani
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Publication number: 20140219319Abstract: A signal processing method, a connector and a memory storage device are provided. The signal processing method is for the connector which does not include a crystal oscillator. The signal processing method includes: receiving a first signal stream from a host system; tracking a transmission frequency of the first signal stream, and obtaining a frequency shift quantity of the first signal stream relative to the transmission frequency; determining if a spread spectrum operation is performed on the first signal stream according to the frequency shift quantity to generate a determination result; generating a second signal stream according to the determination result and the transmission frequency. Accordingly, the spread spectrum operation is handled under the situation without a crystal oscillator.Type: ApplicationFiled: April 16, 2013Publication date: August 7, 2014Applicant: Phison Electronics Corp.Inventors: An-Chung Chen, Chih-Ming Chen
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Patent number: 8798125Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.Type: GrantFiled: August 5, 2013Date of Patent: August 5, 2014Assignee: Broadcom CorporationInventors: Tommy Yu, Amy Gayle Hundhausen
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Publication number: 20140204980Abstract: Systems, methods and apparatus are provided through which in some implementations a here-i-am (HIA) transmission on a first RF channel, a registration (REG) transmission on a second RF channel and a location tacking messaging (LOC) transmission on a third RF channel is operable to identify location between a network and beacons using a wireless communications channel that permits the beacons to be tracked by the network for location of the beacons.Type: ApplicationFiled: January 19, 2013Publication date: July 24, 2014Applicant: TIMES THREE WIRELESS INC.Inventors: Michael Hryciuk, Ned Benner, Edward Robert Benner, Michel Fattouche, Andrew Borsodi
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Patent number: 8768275Abstract: Performing spectral analysis may include, for each of multiple acquisitions: a receiving a plurality of time-domain samples, cross-power spectrum analyzing first and second portions of the plurality of samples resulting in cross-power spectra, and accumulating a vector sum of the cross-power spectra including any cross-power spectra from previous acquisitions. Performing spectral analysis may also include calculating a vector average based on the accumulated vector sum and quantity of acquisitions. Performing spectral analysis may also include displaying the magnitude of the vector average.Type: GrantFiled: November 10, 2011Date of Patent: July 1, 2014Assignee: National Instruments CorporationInventor: Edward B. Loewenstein
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Publication number: 20140146857Abstract: A method for setting frequency channels in a multi-hop wireless mesh network including a plurality of nodes. Each node hops on frequency channels, with a hop period, according to a frequency channels hopping sequence. All data packets transmitted by the nodes have a duration strictly longer than the hop period. When a given node of the plurality of nodes is in a first transmit mode in order to transmit a data packet, it carries out steps of: selecting a transmit frequency channel as a function of the frequency channels hopping sequence; and transmitting the data packet using, for the entire duration of the data packet, the selected transmit frequency channel.Type: ApplicationFiled: November 27, 2013Publication date: May 29, 2014Inventors: Florent Guichard, Fabien Le Moine, Sophie Lostanlen-Nouy
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Patent number: 8724677Abstract: Provided are a method and apparatus (receiver) of receiving and processing a radio signal in a transmitter-receiver environment. The radio signals are transmitted across a wireless interface using Ultra Wideband (UWB) pulses. A transmitted reference approach is utilized. The radio signal include pairs of UWB pulses with each pair of pulses separated by a fixed time delay. The two pulses are then combined to provide for improved noise immunity.Type: GrantFiled: October 17, 2013Date of Patent: May 13, 2014Assignee: University of South FloridaInventor: James L. Tucker
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Publication number: 20140126610Abstract: In one embodiment, a device determines a need to resynchronize a broadcast and unicast frequency-hopping schedules on its network interface. In response to the need, the device may solicit the broadcast schedule from one or more neighbor devices having the synchronized broadcast schedule, and then establishes the unicast schedule for the network interface using communication during the synchronized broadcast schedule.Type: ApplicationFiled: November 5, 2012Publication date: May 8, 2014Applicant: Cisco Technology, Inc.Inventors: Jonathan W. Hui, Wei Hong, Jean-Philippe Vasseur
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Patent number: 8711901Abstract: A video processing device operates in an encoding mode when a mode selection signal has a first value and operates in a decoding mode when the mode selection signal has a second value. The encoding mode utilizes a plurality of function specific hardware engines that each perform a specific coding function and the decoding module utilizes at least one of the plurality of hardware engines.Type: GrantFiled: March 12, 2007Date of Patent: April 29, 2014Assignee: ViXS Systems, Inc.Inventors: Eric Young, Edward Hong
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Patent number: 8711899Abstract: The invention relates to a method for determining a set of frequencies that can be used in a frequency plane for transmitting information between transceivers of a network operating with frequency hopping. One inventive aspect includes determining an initial set of frequencies that can be used, whose variations having a magnitude lower than a threshold, monitoring first and second portions of the frequency plane, the first portion comprising the set of frequencies that can be used, the second portion comprising frequencies that do not belong to that set of frequencies, and subsequently determining a new set of frequencies that can be used. The determination associated with the first portion has a first threshold, and the determination associated with the second portion has a second threshold which is separate from the first.Type: GrantFiled: October 19, 2012Date of Patent: April 29, 2014Assignee: ThalesInventors: Bruno Deltour, Yves Singlas, Thibault De Moegen
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Patent number: 8705656Abstract: A transmission apparatus includes a plurality of orthogonal frequency division multiplexing (OFDM) modulation signal generators, which generate a first OFDM modulation signal and a second OFDM modulation signal. The transmission apparatus also includes a transmitter that transmits the first OFDM modulation signal from a first antenna and the second OFDM modulation signal from a second antenna, in an identical frequency band.Type: GrantFiled: April 18, 2013Date of Patent: April 22, 2014Assignee: Panasonic CorporationInventors: Yutaka Murakami, Masayuki Orihashi, Akihiko Matsuoka
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Patent number: 8687670Abstract: A Bluetooth paging procedure can implement a mechanism for predicting a Bluetooth paging channel in a paging channel hopping sequence. One or more Bluetooth paging channels, on which one or more page requests intended for a Bluetooth device were received, are determined from a plurality of Bluetooth communication channels. One of a plurality of paging channel hopping sequences associated with the Bluetooth device that comprises each of the one or more determined Bluetooth paging channels is identified. A time delay associated with determining a target Bluetooth paging channel from the plurality of Bluetooth communication channels on which to transmit a page response is determined. The target Bluetooth paging channel is determined based, at least in part, on the identified one of the plurality of the paging channel hopping sequences and the time delay.Type: GrantFiled: May 26, 2011Date of Patent: April 1, 2014Assignee: QUALCOMM IncorporatedInventors: Yann Ly-Gagnon, Paul J. Husted
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Patent number: 8660135Abstract: A method, apparatus and computer program product are provided that may reduce the number of false accepts by reducing the instances in which a mobile terminal mistakenly determines that control channel information is intended for the mobile terminal. The method, apparatus and computer program product may determine whether control channel information appears to be directed to a respective mobile terminal, determine whether one or more filler bits have respective predefined values and thereafter identify the information to not be intended for the respective mobile terminal in an instance in which the filler bits fail to have the predefined values. In an instance in which the control channel information provides an uplink grant, the method, apparatus and computer program product may cause data to be transmitted via an uplink established per the uplink grant only if the filler bits have the predefined values.Type: GrantFiled: February 22, 2011Date of Patent: February 25, 2014Assignee: Broadcom CorporationInventor: Jussi Heikki Antila
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Patent number: 8654814Abstract: A method for identifying the presence of an electronic transmission comprising detecting, by a detecting device, the presence of a burst of electromagnetic energy that results from the presence of an original carrier signal and transmitting, by a transmitting device, a spread spectrum meta-carrier signal within a portion of a bandwidth of the original carrier signal, wherein the meta-carrier signal contains information about the original carrier signal and is transmitted such that the meta-carrier signal occupies at least a portion of a bandwidth of the original carrier signal during the presence of the burst of electromagnetic energy.Type: GrantFiled: March 9, 2011Date of Patent: February 18, 2014Assignee: Comtech EF Data Corp.Inventors: Michael Beeler, Cris M. Mamaril, Jeffery Harig
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Patent number: 8649729Abstract: A system and method are provided for transmitting a broadband interference signal and allowing communication through the transmitted interference signal. The system includes an interference transmitter for transmitting the interference signal, the interference transmitter having a transmitter feeder and a first antenna; a radio receiver for receiving a radio signal, the radio receiver having a radio feeder and a second antenna collocated with the first antenna of the interference transmitter; a steering signal generator for introducing at least one steering signal into the interference signal at the transmit feeder; a first directional coupler for sampling a portion of the interference signal that includes at least one of the steering signals; a negative feedback loop for adjusting the amplitude and phase of the sampled portion of the interference signal; and a second directional coupler for coupling the adjusted sampled portion of the interference signal into the radio feeder.Type: GrantFiled: November 20, 2009Date of Patent: February 11, 2014Assignee: Cobham CTS LimitedInventors: Stephen James Nightingale, George John Woloszczuk
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Publication number: 20140036962Abstract: A method of emission of a frequency synchronization signal comprises a first step of determining at least two first emission frequencies respectively associated with at least two first intervals separated temporally by a first duration. The first temporal intervals are of identical duration. The first durations are identical for identical first frequencies and the first durations are different for different first frequencies. The method also comprises a second step of emitting at least one synchronization signal in the first temporal intervals and by using the first frequency, the signal emitted in the first intervals being identical.Type: ApplicationFiled: July 31, 2013Publication date: February 6, 2014Inventors: Marc TOURET, Thierry MENIGAND, Marc COUTOLLEAU
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Patent number: 8644361Abstract: Provided is a terminal apparatus that can suppress the increase in interference between pilot signals in the same slot, while also suppressing the degradation of the flexibility to design cell cluster structures. When hopping information indicates an inter-slot hopping, a mapping unit (212) arranges a first pilot sequences in which a group to which the sequences used in respective slots belong varies on a slot-by-slot basis. When the hopping information indicates an inter-subframe hopping, the mapping unit (212) arranges a second pilot sequences in which a group to which the sequences used in respective slots belong varies on a subframe-by-subframe basis. The sequence group to which the sequences used in any one of the subframes in the second pilot sequences belong is identical with the sequence group to which the sequence used in any one of the slots included in that one subframe in the first pilot sequences belongs.Type: GrantFiled: March 17, 2011Date of Patent: February 4, 2014Assignee: Panasonic CorporationInventors: Yoshihiko Ogawa, Takashi Iwai, Akihiko Nishio, Seigo Nakao
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Patent number: 8630279Abstract: An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group.Type: GrantFiled: May 30, 2007Date of Patent: January 14, 2014Assignees: Electronics and Telecommunications Research Institute, SK Telecom., Co., Ltd, KT CorporationInventors: Kap-Seok Chang, Il-Gyu Kim, Nam-Il Kim, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang
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Patent number: 8619920Abstract: A transmitter comprises a first spreading unit configured to multiply each of multiple data symbols with a first spreading code sequence of a first spreading factor; a compression and repetition unit configured to compress output signals of the first spreading unit in time domain and repeat the compressed signal L times (where L is a natural number greater than or equal to 2); a phase modulation unit configured to multiply the compressed and repeated signal with a user dependent phase and output a data block consisting of L sub-blocks; a second spreading unit configured to replicate the data block according to a second spreading factor and multiply each set of the replicated sub-blocks with a second spreading code sequence of the second spreading factor to produce a two-dimensionally spread signal; and a wireless transmission unit configured to transmit the two-dimensionally spread signal using a single-carrier transmission scheme.Type: GrantFiled: November 5, 2008Date of Patent: December 31, 2013Assignees: NTT DoCoMo, Inc., Agency for Science, Technology and ResearchInventors: Hiroyuki Atarashi, Mamoru Sawahashi, Francois Po Shin Chin, Zhongding Lei, Xiaoming Peng, Ying-Chang Liang
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Patent number: 8619789Abstract: In one embodiment, a battery-operated communication device “quick-samples” a frequency hopping sequence at a periodic rate corresponding to a substantially low duty cycle, and is discovered by (e.g., attached to) a main-powered communication device. During a scheduled sample, the main-powered communication device transmits a control packet to be received by the battery-operated communication device, the control packet containing timing information and transmitted to account for worst-case clock drift error between the two devices. The battery-operated communication device responds to the control packet with a link-layer acknowledgment containing timing information from the battery-operated communication device. Accordingly, the two devices may re-synchronize their timing based on the timing information in the control packet and acknowledgment, respectively.Type: GrantFiled: July 12, 2011Date of Patent: December 31, 2013Assignee: Cisco Technology, Inc.Inventors: Jonathan W. Hui, Lik Chuen Alec Woo, Wei Hong
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Publication number: 20130343431Abstract: A method and apparatus are disclosed for searching for a neighboring bluetooth device. The method includes: when searching out a neighboring bluetooth device, a bluetooth device initiating a searching operation judging whether the neighboring bluetooth device is a recorded bluetooth device in a bluetooth management database; if no, sending a name request command to the neighboring bluetooth device, and acquiring a name of the neighboring bluetooth device; or else, judging whether the name of the neighboring bluetooth device has ever been changed by a user according to a name management field carried in a Frequency Hop Synchronization (FHS) group of the neighboring bluetooth device; if the name has not ever been changed, acquiring a stored name of the neighboring bluetooth device from the bluetooth management database; if changed, sending the name request command to the neighboring bluetooth device, and acquiring the name of the neighboring bluetooth device.Type: ApplicationFiled: June 8, 2011Publication date: December 26, 2013Applicant: ZTE CORPORATIONInventor: Hui Yang
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Patent number: 8615058Abstract: A signal acquisition system efficiently acquires a transmitted signal even at very low power. The system may synchronize to a preamble structure in the transmitted signal and, for example, determine timing parameters that locate the preamble with respect to system timing or other clock references. The system is particularly effective at acquiring weak power signals and is also robust against significant noise and other impairments, and therefore improves the ability of a receiving device that incorporates the signal acquisition system to acquire the signal and establish communication with other devices.Type: GrantFiled: September 27, 2011Date of Patent: December 24, 2013Assignee: Broadcom CorporationInventors: Ka Shun Carson Pun, Siavash Ekbatani, David Ho, Siukai Mak
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Patent number: 8594138Abstract: Improvements are disclosed for in-band signaling, i.e., transmission of data in a voice channel of a digital wireless network during a voice call session. A family of narrow-band signaling methods, some employing tapered waveforms, is disclosed to successfully pass data-carrying signals through the low-bit rate modes of the EVRC-B vocoder commonly used in CDMA wireless channels. These features can be used in cell phones or other wireless communication devices, including automotive applications.Type: GrantFiled: July 18, 2011Date of Patent: November 26, 2013Assignee: Airbiquity Inc.Inventor: Michael Hirano
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Patent number: 8588270Abstract: The invention includes a method for transmitting and detecting high speed Ultra Wideband pulses across a wireless interface. The transmitter includes a serializer and pulse generator. The receiver comprises a fixed delay line, multiplier, local serializer (with a sequence matching the transmitter), digital delay lines, low noise amplifier and logic fan-out buffer along with an array of D flip-flop pairs. Each flip-flop pair is enabled, at fixed time increments, to detect signals at a precise time; the timing is controlled by the pseudo-random sequence generated by the local serializer. A local tunable oscillator is controlled by detecting the phase change of the incoming signal and applying compensation to maintain the phase alignment and clock synchronization of the receiver to the clock reference of the transmitter. The invention uses a pair of pulses with a fixed delay and then relies on mixing the two to provide better noise immunity.Type: GrantFiled: December 4, 2012Date of Patent: November 19, 2013Assignee: University of South FloridaInventor: James L. Tucker
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Patent number: 8571148Abstract: A system including a control module and a correlation module. The control module receives signals, including subcarriers having frequencies in a frequency band, via a plurality of antennas, and divides the frequency band into sub-bands each including a plurality of the subcarriers. The correlation module generates sets of correlation values by correlating symbols in the sub-bands with a plurality of preamble sequences. A set of correlation values is generated for one of the plurality of antennas and is generated based on the preamble sequences. The control module generates sums by adding selected correlation values from the sets. The selected correlation values in a sum are generated respectively for the plurality of antennas and are generated based on one of the preamble sequences. The control module detects a preamble sequence in the signals by determining whether a largest one of the sums is greater than or equal to a predetermined threshold.Type: GrantFiled: August 7, 2012Date of Patent: October 29, 2013Assignee: Marvell International Ltd.Inventors: Jungwon Lee, Hui-Ling Lou
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Patent number: 8547951Abstract: A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.Type: GrantFiled: June 1, 2010Date of Patent: October 1, 2013Assignee: QUALCOMM IncorporatedInventors: Tingfang Ji, Ayman Naguib, Arak Sutivong, Dhananjay Ashok Gore, Alexei Gorokhov
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Patent number: 8548027Abstract: The embodiments of the present invention disclose an apparatus for transmitting multi-ary error-correcting codes, an apparatus for receiving multi-ary error-correcting codes, a data transmission system, and relevant methods to simplify operations. The apparatus for transmitting multi-ary error-correcting codes includes: a multi-ary channel encoder, adapted to perform multi-ary coding for source data frames of a user to obtain encoded sequences; a symbol mapper, adapted to perform symbol mapping for the encoded sequences to obtain symbol sequences; and a spreading and interleaving unit, adapted to spread and interleave the symbol sequences. Moreover, a corresponding apparatus for receiving multi-ary error-correcting codes, a data transmission system, and relevant methods are provided.Type: GrantFiled: April 30, 2010Date of Patent: October 1, 2013Assignee: Huawei Technologies Co., Ltd.Inventors: Yanxing Zeng, Raymond W. K. Leung, Ying Jin, Chao Zhang
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Publication number: 20130251000Abstract: Methods, systems and metering devices are provided for performing synchronous communication in a frequency hopping communication system without the use of expensive clock circuitry and/or significant amounts of data traffic on the communication system.Type: ApplicationFiled: March 22, 2012Publication date: September 26, 2013Applicant: ELSTER SOLUTIONS, LLCInventor: Kenneth C. Shuey
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Publication number: 20130243039Abstract: Techniques for transmitting pilot and traffic data are described. In one aspect, a terminal may scramble its pilot with a scrambling sequence generated based on a set of static and dynamic parameters. The static parameter(s) have fixed value for an entire communication session for the terminal The dynamic parameter(s) have variable value during the communication session. The terminal may generate a scrambling sequence by hashing the set of parameters to obtain a seed and initializing a pseudo-random number (PN) generator with the seed. The terminal may then generate the pilot based on the scrambling sequence. In another aspect, the terminal may use different scrambling sequences for pilot and traffic data. A first scrambling sequence may be generated based on a first set of parameters and used to generate the pilot. A second scrambling sequence may be generated based on a second set of parameters and used to scramble traffic data.Type: ApplicationFiled: May 3, 2013Publication date: September 19, 2013Applicant: QUALCOMM IncorporatedInventors: Aamod Khandekar, Alexei Gorokhov, Mohammad J. Borran, Rajat Prakash
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Patent number: 8537876Abstract: A method, an apparatus, and a computer program that includes forming frequency hopping position of the sounding reference signal is based on a hopping pattern. The hopping pattern of the sounding reference signal is configured to utilize a tree assignment for a frequency allocation of the sounding reference signal and to support at least one frequency band branch per layer. The hopping pattern of the sounding reference signal is also configured to provide consecutive sounding reference signals on widely separated frequency allocations.Type: GrantFiled: March 20, 2009Date of Patent: September 17, 2013Assignee: Nokia Siemens Networks OyInventors: Kari Hooli, Kari Pajukoski, Esa Tiirola
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Patent number: 8520629Abstract: Provided are a method and an apparatus for performing a piconet coordinator (PNC) handover in a wireless personal area network (WPAN) in which devices using various PHY transmission modes coexist. A device that enters the WPAN transfers information about its PHY transmission mode to the PNC through an association request message so that a problem that conventional services are not provided to a user in the WPAN due to a difference in PHY transmission modes of the devices during the PNC handover can be solved.Type: GrantFiled: November 11, 2008Date of Patent: August 27, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Chang-yeul Kwon, Seong-soo Kim, Ji-sung Oh, Jae-min Lee
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Patent number: 8503594Abstract: The present invention includes a method of determining a phase estimate for an input signal having pilot symbols. The method includes receiving a plurality of pilot symbols, and then multiplying two or more pilot symbol slots by corresponding correlator coefficients to correct a phase estimate of the input signal.Type: GrantFiled: September 5, 2012Date of Patent: August 6, 2013Assignee: Broadcom CorporationInventors: Tommy Yu, Amy Gayle Hundhausen
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Patent number: 8503578Abstract: A method of processing first and second corresponding signals having a delay therebetween. The method includes introducing a plurality of different delays between the first and second signals, successive delay amounts differing from each other by less than the interval between chip boundaries, and for each introduced delay, summing samples of the second signal which are obtained at the times of, at least, chip boundaries between bits of the first signal which have the same state, to obtain a value; thereby to obtain a representation of how the value varies according to the introduced delay, which representation contains a level change associated with an introduced delay which bears a predetermined relationship to the delay between the first and second signals.Type: GrantFiled: March 27, 2008Date of Patent: August 6, 2013Assignee: Mitsubishi Electric CorporationInventor: Nongji Chen
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Patent number: 8472499Abstract: An adaptive multi-channel architecture for a wireless network is provided. A frequency hopping sequence generator module is compliant with a frequency hopping spread spectrum (FHSS) communications protocol. The frequency hopping sequence generator module is capable of performing FHSS concurrently on a plurality of communications channels. A frequency replacement module is coupled to the frequency hopping sequence generator module. The frequency replacement module is configured to receive feedback data over a feedback channel and adaptively select a transmission channel from the plurality of communications channels using the feedback data.Type: GrantFiled: December 18, 2007Date of Patent: June 25, 2013Assignee: Honeywell International Inc.Inventors: Haowei Bai, Randall H. Black, Blaine B. Shelton, Allalaghatta Pavan
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Patent number: 8446892Abstract: A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.Type: GrantFiled: May 13, 2005Date of Patent: May 21, 2013Assignee: QUALCOMM IncorporatedInventors: Tingfang Ji, Ayman Naguib, Arak Sutivong, Dhananjay Ashok Gore, Alexei Gorokhov
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Patent number: 8443083Abstract: Multiple applications sharing common resources are arbitrated such that failures resulting from unavailable resources can be avoided. Whenever an application (e.g., a data application) desires to perform an operation (e.g., PPP resynchronization) that requires the use of a shared resource (e.g., an RF receiver), a determination is made as to whether that resource is available. The operation may be delayed while the resource is unavailable. The application may be assigned the resource if it is available or becomes available and may then start the operation. The resource is locked while the operation is pending to avoid assignment to another application. The resource arbitration allows applications to complete their operations without encountering failures due to other applications taking over the resources.Type: GrantFiled: April 27, 2006Date of Patent: May 14, 2013Assignee: QUALCOMM IncorporatedInventors: Sanjeev Khushu, Sriram Nagesh Nookala, Simon Turner, Uppinder Singh Babbar
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Patent number: 8432950Abstract: A maneuvering signal for controlling a radio-controlled object is transmitted using 2.4 GHz band frequency hopping techniques. In a trainer mode, an instructor's radio control transmitter is configured to transmit the maneuvering signal and receive a trainer signal in each of frame periods by which a frequency is switched in accordance with the frequency hopping scheme. A trainee's radio control transmitter is configured to transmit the trainer signal for each of the frame periods by which a frequency is switched in accordance with the frequency hopping scheme.Type: GrantFiled: September 16, 2010Date of Patent: April 30, 2013Assignee: Futaba CorporationInventors: Masahiro Tanaka, Eiichi Nishizawa
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Publication number: 20130094537Abstract: In one embodiment, a device in a channel hopping communication network independently maintains a slot counter, and computes a channel identification (ID) based on a function having inputs of i) a unique feature of the device, ii) a current slot of the slot counter, and iii) a set of possible channel IDs. Accordingly, the device configures its radio to receive on the computed channel ID for the respective current slot. In another embodiment, the device may determine, for a neighbor device, a current neighbor slot and unique neighbor feature, and correspondingly computes a neighbor channel ID based on the function using the unique neighbor feature, the current neighbor slot, and the set of possible channel IDs. As such, the device configures its radio to transmit on the computed neighbor channel ID for the respective current neighbor slot.Type: ApplicationFiled: October 13, 2011Publication date: April 18, 2013Applicant: CISCO TECHNOLOGY, INC.Inventors: Jonathan W. Hui, Jean-Philippe Vasseur