Miscellaneous Patents (Class 375/377)
  • Patent number: 7809093
    Abstract: To provide a mobile terminal capable of shortening the time required for deciding whether a terminal is located within the range of an area frequency at the time of the terminal power switched on, and securely performing location registration to a cell producing a large electric field intensity by recognizing an area frequency in advance.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: October 5, 2010
    Assignee: Fujitsu Limited
    Inventor: Yusuke Shinoda
  • Patent number: 7809090
    Abstract: In a method for determining a transmitted data rate, a received data frame may be decoded using different candidate rates to generate a first decoded bit sequence associated with each candidate rate. A first frame quality indicator and a first error metric may be generated for each of the candidate rates based on the associated first decoded bit sequence and a decoding metric for the associated first decoded bit sequence. One of the candidate rates may be selected as the transmitted data rate based on the first frame quality indicators, the first error metrics and an error metric threshold.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: October 5, 2010
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Francis Dominique, Hongwei Kong, Walid E. Nabhane, Ashok Armen Tikku
  • Patent number: 7792180
    Abstract: A data transceiver that determines according to signal strength of a received radio wave whether a receiving operation should be continued. A measurement unit counts demodulation clocks of a demodulator and supplies a measurement result indicating instability of reception data until the count reaches a predetermined target count value, and supplies a measurement result indicating stability of the reception data after the count value is reached. A determinator receives the result of measurement indicative of instability, and outputs a determination result indicative of stopping a receiving operation regardless of signal strength. When the determinator receives the result of measurement indicative of stability, the determinator outputs a determination result corresponding to the signal strength of the reception data. Thus, receiving operation is advanced after reception data is sufficiently stable.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: September 7, 2010
    Assignee: Oki Semiconductor Co., Ltd.
    Inventor: Takeshi Ichikawa
  • Patent number: 7787582
    Abstract: A control unit in which at least one inertial sensor and a processor are accommodated in a housing. The data transmission between the inertial sensor and the control unit is performed digitally. The transmission may be provided with error bits or status bits. The data transmission is configured to be bidirectional in particular. Four lines are provided between the control unit and the sensor, one of the lines being used for selecting the sensor.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: August 31, 2010
    Assignee: Robert Bosch GmbH
    Inventors: Eckard Steiger, Christian Ohl, Hartmut Schumacher
  • Patent number: 7787543
    Abstract: A pulse pattern generator (11) has a pulse generating unit (12) and a lowpass filter (14), and the pulse generating unit (12) includes an amplitude-value setting unit (13, 13a). The pulse generating unit (12) generates a pulse signal formed in a step-like wave in which at least one of rise and fall of a signal is changed in a step-like manner. The lowpass filter (14) smoothes the pulse signal generated by the pulse generating unit (11), and outputs a smoothed pulse signal. The amplitude-value setting unit (13, 13a) adjusts an amplitude value of a step-like wave that forms the pulse signal in order to set a shape of an eye waveform based on a setting value when an eye pattern of the output from the lowpass filter (14) is formed. The pulse pattern generator (11) can output the pulse signal having a desired pulse pattern having the predetermined eye closure from the lowpass filter (14).
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: August 31, 2010
    Assignee: Anritsu Corporation
    Inventor: Kazuhiko Yamaguchi
  • Patent number: 7778350
    Abstract: Provided is a multi-carrier communication device capable of reducing the deterioration of a reception quality while suppressing the peak power of a multi-carrier signal. In this device, a clipping strain measurement unit (108) calculates the individual average powers (or the clipping strain powers) of peak suppression signals contained in a center area and in end areas. Moreover, the clipping strain measurement unit (108) uses the calculated clipping strain, to calculates the ratios of the signal powers to the clipping strain powers (or the ratios of the signals to the clipping strains) individually for the center area and the end areas, and outputs the calculated ratios of the signals to the clipping strains to a puncture-modulation mode selection unit (109).
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: August 17, 2010
    Assignee: Panasonic Corporation
    Inventors: Sadaki Futagi, Takashi Kitahara
  • Patent number: 7778374
    Abstract: A dual reference input receiver, and a method of receiving, wherein the input receiver includes a first input buffer which is synchronized with and enabled by a clock signal, senses a difference between the input data signal and a first reference voltage, and amplifies the sensing result; a second input buffer which is synchronized with and enabled by the clock signal, senses a difference between a second reference voltage and the input data signal, and amplifies the sensing result; and a phase detector which detects a difference between a phase of output signals of the first and second input buffers, and outputs a signal corresponding to the detection result. The first and second reference voltages may respectively be higher and lower than a median voltage of the input data signal. Thus, a single input data signal is advantageously used and a wide input data eye is provided.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: August 17, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Young-jin Jeon
  • Patent number: 7778349
    Abstract: A method and an apparatus for transmitting information contained in a transmission signal via at least one channel includes a number of processing steps at the transmitter end. At least one pulse sequence with at least one pulse is produced as stipulated by the transmission signal. The pulse sequence is output to the at least one channel. The channel is monitored for the presence of an interference signal. If an interference signal is detected on the channel, the pulse sequence is repeated.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: August 17, 2010
    Assignee: Infineon Technologies AG
    Inventor: Karim-Thomas Taghizadeh-Kaschani
  • Patent number: 7773715
    Abstract: A process variable transmitter that preferably includes a transmitter output circuit that provides bidirectional HART and controller area network communication transceiver lines. The transmitter output circuit also includes sensor circuit interface contacts. An isolated circuit couples to the sensor circuit interface contacts. The isolated circuit includes sensor circuitry sensing a process variable. The isolated circuit further comprises a galvanic isolation barrier galvanically isolating the sensor circuitry from the HART and controller area network transceiver lines. A stacked power supply provides power management. Other aspects may include a controller area network current limiter diagnostic output, timed sequencing of microcontroller startup and shutdown, a local operator interface and power management.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: August 10, 2010
    Assignee: Rosemount Inc.
    Inventors: Brian Lee Westfield, Kelly Michael Orth
  • Patent number: 7773714
    Abstract: The invention concerns a method (500) for employing adaptive event codes. The method includes the steps of generating (512) at least one adaptive event code in which the adaptive event code corresponds to a preexisting event code, storing (514) the adaptive event code in at least one table (154, 156), running (516) the table in which the adaptive event codes are at least initially disabled and enabling (522) the adaptive event code in response to a system event in which the preexisting event code that corresponds to the enabled adaptive event code is executed (526). The method can further include the step of ignoring (518) the adaptive event codes during the running step when the adaptive event codes are disabled.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: August 10, 2010
    Assignee: Motorola, Inc.
    Inventors: Charbel Khawand, Jianping Tao, John J. Vaglica
  • Patent number: 7764755
    Abstract: A method of synchronization of a digital circuit includes selecting a first site and a second site from a plurality of different sites of the digital circuit where a signal to be synchronized occurs; passing a first signal, which is the signal to be synchronized of the first site, via a first line that starts at the first site, ends at the second site, and contacts each of the sites just once, to the second site; passing a second signal, which is the signal to be synchronized of the second site, via a second line that starts at the second site, ends at the first site, and contacts each of the sites just once, to the first site; determining, for each site, a first phase shift between the signal to be synchronized of this site and the first signal, and a second phase shift between the signal to be synchronized of this site and the second signal; and determining, from the first and second phase shifts of each site, a delay for each site, with which the signal to be synchronized of the respective site is delayed
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: July 27, 2010
    Assignee: Qimonda AG
    Inventors: Michael Brünnert, Paul Georg Lindt
  • Patent number: 7760796
    Abstract: The present invention provides a transceiver for receiving and transmitting data over a network, and a method for testing the same. In particular, the present invention provides a physical layer transceiver having a built-in-self-test (BIST) device that allows for, among other things, pulse density/width variation and jitter control.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: July 20, 2010
    Assignee: International Business Machines Corporation
    Inventor: Joseph A. Iadanza
  • Patent number: 7756216
    Abstract: As in a conventional technology, a hard clipping process and a filtering process are performed on a transmission signal. An original transmission signal is subtracted from a signal on which the processes have been performed, and an inverse sign signal to the suppressed signal is retrieved. By giving a gain to the signal, and adding up to the original transmission signal, a peak voltage is suppressed. The gain can be a ratio of a difference signal between a hard clipped signal and an original transmission signal to a signal of suppression of a filtered signal from the original transmission signal, or a value determined by a simulation depending on the cutoff frequency of a low pass filter used in the filtering process.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: July 13, 2010
    Assignee: Fujitsu Limited
    Inventors: Hiroyoshi Ishikawa, Hajime Hamada, Kazuo Nagatani, Nobukazu Fudaba, Tokuro Kubo
  • Patent number: 7756487
    Abstract: A novel and useful apparatus for and method of local oscillator (LO) generation with non-integer multiplication ratio between the local oscillator and RF frequencies. The LO generation schemes presented are operative to generate I and Q square waves at a designated frequency while avoiding the well known issue of harmonic pulling. The input signal is fed to a synthesizer timed to a rational multiplier of the RF frequency L/N fRF. The clock signal generated is divided by a factor Q to form 2Q phases of the clock at a frequency of L(N*Q)fRF, wherein each phase undergoes division by L. The phase signals are input to a pulse generator which outputs a plurality of pulses. The pulses are input to a selector which selects which signal to output at any point in time. By controlling the selector, the output clock is generated as a TDM based signal. Any spurs are removed by an optional filter.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: July 13, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory Lerner, Nir Tal, Robert B. Staszewski
  • Patent number: 7752042
    Abstract: Methods and apparatus to operate an audience metering device with voice commands are described herein. An example method to identify audience members based on voice, includes: obtaining an audio input signal including a program audio signal and a human voice signal; receiving an audio line signal from an audio output line of a monitored media device; processing the audio line signal with a filter having adaptive weights to generate a delayed and attenuated line signal; subtracting the delayed and attenuated line signal from the audio input signal to develop a residual audio signal; identifying a person that spoke to create the human voice signal based on the residual audio signal; and logging an identity of the person as an audience member.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: July 6, 2010
    Assignee: The Nielsen Company (US), LLC
    Inventor: Venugopal Srinivasan
  • Patent number: 7742556
    Abstract: Circuits, methods, apparatus, and systems for recovering a clock from a spread spectrum signal having a periodic modulation profile. The circuits generally include an error detector circuit configured to compare the spread spectrum signal and a recovered clock signal, and to produce a first error signal corresponding to the periodic modulation profile and a second error signal corresponding to phase differences other than the spread spectrum modulation, a record and playback unit configured to record a value to a frequency memory, said value based on the first error signal and produce a third error signal corresponding to a predicted periodic modulation based at least in part on the recorded value, and a signal generator configured to produce the recovered clock signal in response to the second and third error signals.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: June 22, 2010
    Assignee: Marvell International Ltd.
    Inventors: Haoli Qian, Runsheng He
  • Patent number: 7738592
    Abstract: A wireless communication apparatus capable of suppressing the reduction in the error correction ability in the wireless communication apparatus at the receiving end even when the propagation path environment is bad and hence the reception quality of received signals is low.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: June 15, 2010
    Assignee: Panasonic Corporation
    Inventors: Masaru Fukuoka, Kenichi Miyoshi, Sadaki Futagi
  • Patent number: 7738569
    Abstract: Methods and systems are disclosed for ultra-wideband (UWB) secure wireless device pairing. Secure pairing between devices for secure UWB communications is conducted over in-band UWB communications to provide secure pairing without requiring a visual confirmation through a graphical user interface (GUI), in particular, for wireless personal area network (WPAN) communications. The secure in-band pairing of wireless UWB devices over a UWB radio link provides considerable advantages over prior secure pairing techniques.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: June 15, 2010
    Assignee: Dell Products L.P.
    Inventors: Liam B. Quinn, Douglas M. Anson, William Dale Todd Nix
  • Patent number: 7733977
    Abstract: Disclosed are a radio transmission device and a radio transmission method capable of containing a plenty of mobile stations for receiving low-rate data and avoiding lowering a system throughput. A group ID assigning unit (108) groups UE receiving low-rate data and assigns a frequency by using the group ID. An SCCH processing unit (109) generates an SCCH containing the group ID. A low-rate control information processing unit (113) generates low-rate control information indicating a timing slot to which a low-rate UE has been assigned. A multiplexing unit (117) multiplies low-rate control information on RB to which low-rate data is assigned when multiplexing a pilot channel, SCCH, and data.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: June 8, 2010
    Assignee: Panasonic Corporation
    Inventors: Kenichi Kuri, Akihiko Nishio, Masaru Fukuoka
  • Patent number: 7729443
    Abstract: A wireless communication method of repetition system and the like for ensuring that when the same data symbols are combined, a diversity gain is achieved. In a step (ST 420), a data symbol placing part (105) decides destination places of respective replicated data symbols (S1-S4) such that the same data symbols are not placed at destination place numbers (7,8) of data symbols that exhibit poor channel estimation precisions. In a step (ST 430), the data symbol placing part (105) places, in accordance with the decision in the foregoing step (ST 420), the four data symbols (S1-S4), which are received from a repetition part (102), in one frame received from a channel estimation error predicting part (104).
    Type: Grant
    Filed: December 26, 2005
    Date of Patent: June 1, 2010
    Assignee: Panasonic Corporation
    Inventors: Masaru Fukuoka, Sadaki Futagi, Daichi Imamura, Tomohiro Imai
  • Patent number: 7729418
    Abstract: A testing circuit measures a center frequency of a clock signal outputted by a clock generator. The clock generator has a frequency modulator capable of (1) performing a frequency sampling accurately for the duration of modulation frequency and reducing the duration for frequency measurements, and (2) implementing proper testing of the down-spread controlling feature as one of the SSCG modulation functions by accurately determining the center frequency of the clock signal. The testing circuit measures a center frequency of a clock signal outputted by a clock generator by converting an analog modulation signal into a digital signal and outputting the digital signal, counting the period of the clock signal to obtain a count according to the digital signal outputted by the clock generator, and comparing the count with the predetermined specification values related to the center frequency of the clock signal to obtain and output a comparison result.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: June 1, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuji Watabe
  • Patent number: 7724812
    Abstract: The present invention discloses a de-jittering method for a clock signal, which is implemented by adopting a controllable frequency divider and includes: taking the clock signal to be de-jittered as a reference signal, and comparing a feedback clock signal outputted by the controllable frequency divider with the reference signal; generating the control signal that is then transmitted to the controllable frequency divider; the controllable frequency divider performs frequency division upon the input high-frequency signal to generate a stable clock, and the stable clock is outputted as the feedback clock signal which has been de-jittered. The present invention also discloses a de-jittering apparatus for implementing the above-mentioned method, which includes: a circuit for generating a control signal and a controllable frequency divider. By applying the present invention, the de-jittering circuit for clock signal can be simple.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: May 25, 2010
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Jun Xia
  • Patent number: 7720186
    Abstract: Data is communicated through two separate circuits or circuit groups, each having clock and mode inputs, by sequentially reversing the role of the clock and mode inputs. The data communication circuits have data inputs, data outputs, a clock input for timing or synchronizing the data input and/or output communication, and a mode input for controlling the data input and/or output communication. A clock/mode signal connects to the clock input of one circuit and to the mode input of the other circuit. A mode/clock signal connects to the mode input of the one circuit and to the clock input of the other circuit. The role of the mode and clock signals on the mode/clock and clock/mode signals, or their reversal, selects one or the other of the data communication circuits.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: May 18, 2010
    Assignee: Texas Instruments Incorporated
    Inventor: Lee D. Whetsel
  • Patent number: 7702031
    Abstract: A wireless communication system is configured for adaptive modulation of a transmitted symbol. The specific modulation and/or coding is uniquely identified and data related thereto is embedded within the transmitted symbol. A receiver extracts pilot signals form the transmitted symbol and performs a correlation analysis to identify the particular modulation/coding used for that particular transmitted symbol. This permits adaptive modulation on a symbol-by-symbol basis. A base station communicating with a plurality of peripheral subscribers may utilize different modulation/coding for each subscriber depending on channel conditions.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: April 20, 2010
    Assignee: NextNet Wireless, Inc.
    Inventors: J. Eric Dunn, Mervin L. Grindahl, Keith Barnes
  • Patent number: 7697654
    Abstract: Techniques are provided to determine a more realistic measure of a physical carrier-to-interference plus noise radio (pCINR) associated with a wireless channel between first and second wireless communication devices. Channel conditions are used to derive a channel margin quantity that is in turn used “discount” the pCINR. The discounted pCINR is then used to determine a modulation and encoding scheme that can be used on the wireless channel for communications between the first and second wireless communication devices.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: April 13, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Hang Jin, John Grabner, Li Guo
  • Patent number: 7697653
    Abstract: A mobile station is configured to acquire at least one of country information and carrier in formation as output control information. The mobile station is also configured to receive download data that includes harmful level information. The mobile station includes a predetermined rule for determining whether output of the data is to be permitted based on the harmful level information and the output control information.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: April 13, 2010
    Assignee: NTT DoCoMo, Inc.
    Inventors: Yasutaka Urakawa, Masanori Fujita
  • Patent number: 7693235
    Abstract: A concatenated coding scheme, using an outer coder, interleaver, and the inner coder inherent in an FQPSK signal to form a coded FQPSK signal. The inner coder is modified to enable interative decoding of the outer code.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 6, 2010
    Assignee: California Institute of Technology
    Inventors: Marvin K. Simon, Dariush Divsalar
  • Patent number: 7672363
    Abstract: A method of and system for determining the time required for a digital bit or bit stream to traverse a round-trip path from a source transceiver to at least one destination transceiver and back is disclosed. The relative timing of the transmitted bit or bit stream is compared to the return bit or bit stream using a high speed comparison configuration so as to provide in substantially real-time various measurements related to or derived from the time required to traverse the round trip path, including distance measurement in indoor positioning, real-time locating, adaptive cruise control, intelligent transportation systems, robotics, collision avoidance, personnel accountability, emergency location, search/rescue. In addition, a method of and system for determining the distance between transceivers, and a method of and system for determining the angular position of a transceiver with respect to at least two other transceivers are disclosed.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: March 2, 2010
    Assignee: Tag Safety Systems, Inc.
    Inventor: Edward Bokhour
  • Patent number: 7672367
    Abstract: A system includes a transceiver for communicating over a telecommunication line that is coupled to the transceiver. The transceiver comprises logic configured to measure attenuation of at least one signal transmitted across the telecommunication line. The logic is further configured to automatically select, based on the measured attenuation, a plurality of different data rates for a plurality of initialization signals communicated via the transceiver during an initialization phase that precedes a data phase.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: March 2, 2010
    Assignee: Adtran, Inc.
    Inventors: Marc Kimpe, Jack G. Atkinson, Jr., Richard L. Goodson, Arlynn Wilson
  • Patent number: 7668698
    Abstract: Embodiments of the invention are generally directed to systems, methods, and apparatuses for the direct duty cycle calibration of a receiver clock. In some embodiments, an integrated circuit includes a receive (RX) data path, a RX clock path, and a control path. In some embodiments, the control path uses RX latches, a majority detector, and digital duty cycle control logic to calibrate the duty cycle of the clock signal. Other embodiments are described and claimed.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: February 23, 2010
    Assignee: Intel Corporation
    Inventor: Yueming Jiang
  • Patent number: 7668253
    Abstract: A method for allocating a subchannel in a transmitter of an Orthogonal Frequency Division Multiple Access (OFDMA) cellular communication system in which an entire frequency band includes a plurality of bands, each of the bands includes a plurality of bins, and each of the bins includes a plurality of subcarriers. The method includes dividing a predetermined time interval into an Adaptive Modulation and Coding (AMC) subchannel time interval and a diversity subchannel time interval; selecting any one of the plurality of bands in the AMC subchannel time interval; selecting a predetermined number of bins among the plurality of bins in the selected band; and allocating the selected bins to the AMC subchannel.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: February 23, 2010
    Assignee: Samsung Electronics Co., Ltd
    Inventors: In-Seok Hwang, Jae-Ho Jeon, Soon-Young Yoon, Sang-Hoon Sung, Seung-Joo Maeng, Hoon Huh, Jae-Hee Cho, Jeong-Heon Kim
  • Patent number: 7643575
    Abstract: The present invention relates to receiver equipment with AC-coupled receiver circuits and AC coupling filters. A switch connected between a first stage and a second stage among the receiver circuits is adapted to switch from a high coupling corner frequency, for rapid settling of a signal during preparation of data reception, to a low corner frequency, for low signal distortion during data reception. The receiver circuits are adapted to use known properties in the signal to perform the switch at a time when the short term DC-components of the signal are as low as possible.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: January 5, 2010
    Assignee: Infineon Technologies AG
    Inventors: Michael Lewis, Mikael Rudberg, Elmar Wagner
  • Patent number: 7636409
    Abstract: The present invention relates to a system and method for generating a first clock frequency for a plurality of digital data bursts compressed in time, where each of the plurality of digital data bursts has been multiplexed into one of a plurality of data blocks of higher speed digital data. The system and method includes acquiring the width in data elements of a digital data burst and the width in data elements of a data block of higher speed digital data. The width of one period of a clock pulse is computed at the first clock frequency. A clock pulse is generated at the first clock frequency.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: December 22, 2009
    Assignee: Broadcom Corporation
    Inventor: John Bodenschatz
  • Patent number: 7613270
    Abstract: The present invention includes a time-division-multiple-access (TDMA) communication system having a base station and at least one mobile station, each transmitting and receiving an analog radio-frequency signal carrying digitally coded speech. The speech is encoded using a vocoder which samples a voice signal at variable encoding rates. During periods when the radio-frequency channel is experiencing high levels of channel interference, the encoded voice channel having a lower encoding rate is chosen. This low-rate encoded voice is combined with the high degree of channel coding necessary to ensure reliable transmission. When the radio-frequency channel is experiencing low levels of channel interference, less channel coding is necessary and the vocoder having a higher encoding rate is used. The high-rate encoded voice is combined with the lower degree of channel coding necessary to ensure reliable transmission.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: November 3, 2009
    Assignee: LG Electronics Inc.
    Inventors: Jaleh Komaili, Yongbing Wan
  • Patent number: 7613269
    Abstract: A method for calculating equal error protection (EEP) profiles is disclosed. The method uses a profile function related to a sub-channel size to calculate EEP profiles and then uses the EEP profiles to decode data. When a receiver receives a protection level and a size value of the sub-channel size, a corresponding sub-channel size can be rapidly obtained through a reference table of the protection level and the sub-channel size so as to calculate the required EEP profiles. The method in the present invention requires only a few adders/subtractors and shifters or an easily realizable multiplier to calculate the profiles so that the objective of effectively saving cost and rapidly obtaining the profiles is achieved.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: November 3, 2009
    Assignee: KeyStone Semiconductor Corp.
    Inventors: Chung-Jung Huang, Tsai-Sheng Kao
  • Patent number: 7613239
    Abstract: A digital signal offset adjusting apparatus has a capacitor causing an output terminal to pass a high frequency band of an input digital signal. A first coil has one end connected to an input terminal and a second coil has one end connected to an output. An operational amplifier has an input connected to another end of the first coil, a second input connected to a direct current voltage generator and an output connected to another end of the second coil. The operational amplifier outputs a signal obtained by subtracting and combining the low frequency band, the direct current component and a direct current bias voltage. A frequency characteristic compensating circuit is connected between a reference point and the second input of the operational amplifier. The gain of the operational amplifier increases with a component having a higher frequency from among low frequency bands of the input digital signal.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: November 3, 2009
    Assignee: Anritsu Corporation
    Inventors: Satoru Shiratsuchi, Kazuhiro Fujinuma, Sumio Saito
  • Patent number: 7602875
    Abstract: A sampling apparatus for converting first data, sampled at a first sampling rate, into second data, sampled at a second sampling rate. A FIFO storing the first data based on a write control signal and outputs the second data read out based on a read control signal indicating whether the second data is to be read out during the next time interval. The apparatus further includes a frequency detection unit for measuring the first clock signal during the current time interval to generate the value of the first current clock frequency, generating the value of a current predicted clock frequency from the value of the first current clock frequency and the value of the directly previously predicted clock frequency and for using the value of the current predicted clock frequency as the directly previously predicted clock frequency during the next time interval.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: October 13, 2009
    Assignee: NEC Electronics Corporation
    Inventors: Eiji Sudo, Yasushi Ooi
  • Patent number: 7599446
    Abstract: A modulation device comprises a modulation unit (2) that modulates data in a hierarchical manner using multiple types of modulation techniques, and a transmission unit (3) that transmits the hierarchically modulated data. A demodulation device comprises a receiving unit (4) that receives the hierarchical modulation data having been subjected to hierarchical modulation using multiple types of modulation techniques, and a demodulation unit (6) that demodulates the hierarchical modulation data using a demodulation technique corresponding to a specific hierarchy of the hierarchical modulation data.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: October 6, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Sung Uk Moon, Takahiro Hayashi, Toshiyuki Futakata
  • Patent number: 7596166
    Abstract: An integrated circuit device is provided including a plurality of circuit blocks which operate based on a clock signal. The quartz oscillation circuit outputs a first clock signal. A spectrum spread clock generator outputs a second clock signal having a spread frequency. A clock signal is output to the plurality of circuit blocks and, based on an instruction to output the clock signal from a CPU, a clock signal output to the plurality of circuit blocks is switched from the second clock signal to the first clock signal.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: September 29, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masayuki Hongou
  • Patent number: 7593499
    Abstract: A signal routing apparatus comprises a register bank to store a set of data signals. A delay locked loop generates a set of phase displaced clock signals. A phase controlled read circuit sequentially routes the set of data signals from the register bank in response to the phase displaced clock signals. A Low Voltage Differential Signaling buffer connected to the phase controlled read circuit transmits the data signals in a Low Voltage Differential Signaling mode. The phase displaced clock signals operate in lieu of a higher clock rate in order to reduce power consumption.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: September 22, 2009
    Assignee: Altera Corporation
    Inventors: Kerry Veenstra, Krishna Rangasayee, Robert Bielby
  • Patent number: 7583756
    Abstract: Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different channel conditions at different times, and different multipaths may also experience different channel conditions even when received close in time. A pilot filter with an adaptive response is used to provide an improved estimate of the channel response. Various adaptive pilot filtering schemes may be used. In a first scheme, the channel conditions are estimated based on the quality of the received pilot. In a second scheme, the channel conditions are estimated based on the quality of the pilot estimates (i.e., the filtered pilot symbols). For each scheme, a particular filter response is selected based on the estimated quality of either the received pilot or the pilot estimates.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: September 1, 2009
    Assignee: Qualcomm Incorporated
    Inventors: Parvathanathan Subrahmanya, Da-shan Shiu, Avneesh Agrawal
  • Patent number: 7583774
    Abstract: A clock synchronizer, for generating a local clock signal synchronized to a received clock signal, is described and claimed, along with a corresponding clock synchronization method. The clock synchronizer incorporates a reference oscillator providing a reference signal, and a synthesizer circuit arranged to synthesize a local clock signal from the reference signal. The synthesizer circuit comprises a phase-locked-loop circuit, including a phase detector receiving the reference signal, and a controllable divider arranged in a feedback path from a controlled oscillator to the phase detector, the divider being controllable to set a frequency division value N along the path to determine a ratio of the local clock frequency to the reference frequency. The clock synchronizer also incorporates a clock comparison circuit adapted to generate a digital signal indicative of an asynchronism between the local and remote clock signals. A control link is arranged to link the clock comparison circuit to the divider.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: September 1, 2009
    Assignee: Wolfson Microelectronics plc
    Inventor: Paul Lesso
  • Patent number: 7583734
    Abstract: When a controller transmits a clock pulse of a positive phase as a first transmit signal (a) and a clock pulse of an opposite phase as a second transmit signal (b), the controller modulates the “H” pulse of the second transmit signal to a signal advanced by time of td1 relative to the “L” pulse of the first transmit signal when the logic of transmit data is “1”, and to a signal advanced by time of td2 relative thereto when the logic of transit data is “0” and transmits the modulated signal. A data carrier device detects the change of the delay time of the second transmit signal by using a clock extracted from the first transmit signal to demodulate data (e).
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: September 1, 2009
    Assignee: Panasonic Corporation
    Inventors: Shota Nakashima, Atsuo Inoue, Seizo Inagaki
  • Patent number: 7580486
    Abstract: A multi-input multi-frequency synthesizing apparatus and method for a multi-band radio frequency (RF) receiver. The frequency synthesizing apparatus may generate an output from a greater number of high frequency signals by using one multi-input single side band (SSB) mixer. The multi-input SSB mixer may generate a signal whose frequency is an addition of frequencies of two signals selected from a signal selection control unit, or a difference of frequencies therebetween. According to a circuit configuration of the multi-input SSB mixer, the signal selection control unit may select more than two signals.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: August 25, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Choong-Yul Cha, Eun Chul Park, Hoon Tae Kim
  • Patent number: 7580487
    Abstract: An apparatus and a method for estimating a carrier to interference and noise ratio (CINR) in a communication system. The CINR value is precisely estimated by removing the error floor value, which is caused by the inaccurate sliding average window SAW channel estimation value, from the CINR estimation value. Since the CINR value is precisely estimated, performance of the adaptive power control or the adaptive modulation and coding device is improved.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: August 25, 2009
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jae-Hwan Chang, Yun-Sang Park, Bong-Gee Song
  • Patent number: 7577227
    Abstract: In one embodiment of the method of adaptively selecting an airlink coding scheme in a telecommunications network, a coding scheme operating region is determined based on a currently used coding scheme and measurements representative of a block error rate. A block error coding scheme is determined based on the determined coding scheme operating region. In another embodiment of the method of adaptively selecting an airlink coding scheme in a telecommunications network, a first coding scheme is determined based on measurements representative of one or more conditional channel quality metrics, and a second coding scheme is determined based on measurements representative of a block error rate. One of the first and second coding schemes is selected as the coding scheme.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: August 18, 2009
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Kenneth C. Budka, Arnab Das, Wei Luo
  • Patent number: 7577189
    Abstract: A method is provided that includes selectively engaging impedance circuits one at a time from a plurality of selectable impedance circuits in-line with a communication channel. Each of the plurality of selectable impedance circuits includes a hybrid circuit responsive to a modem and to the communication channel. The method further includes determining a performance characteristic for each of the impedance circuits and selecting one of the plurality of selectable impedance circuits for transmission based on the respective performance characteristic.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: August 18, 2009
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Gregory L. Bella, Thomas J. McCabe
  • Patent number: 7573948
    Abstract: A radio frequency (RF) transmitter includes a digital radio processor and a baseband processor. A complex analog-to-digital converter (ADC) within the radio processor provides an analog interface to the baseband processor to receive an analog complex modulated baseband signal and convert the analog complex modulated baseband signal to a digital complex modulated baseband signal. A demodulator within the radio processor demodulates the digital complex modulated baseband signal to recreate the original transmit digital data as a demodulated digital signal. The demodulated digital signal is processed by a digital processor in the radio processor to mitigate the effects of various imperfections in the radio processor circuitry.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: August 11, 2009
    Assignee: Broadcom Corporation
    Inventor: Henrik T. Jensen
  • Patent number: 7570714
    Abstract: A data transfer apparatus is composed of a transmitter and a receiver. The transmitter includes an output buffer developing a differential signal in response to a data signal, and an amplitude controller. The receiver includes an input buffer converting the differential signal into a single-end signal, and an amplitude detector developing a feedback signal in response to the single-end signal. The amplitude controller controls an amplitude of the differential signal in response to the feedback signal.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: August 4, 2009
    Assignee: NEC Electronics Corporation
    Inventors: Yoshihiko Hori, Keiichi Nakajima
  • Patent number: 7570706
    Abstract: A method of controlling a communication device that is operable to transmit digital data over a plurality of frequency channels. The method includes selecting an initial transmission power and a corresponding data rate for each channel. The method also includes identifying in a first channel a first ratio of a first decrement in transmission power to a first data rate decrement that is greater than a second ratio of a second decrement in transmission power to a second data rate decrement. Then, the initial transmission power allocation of the first channel is reduced by the first decrement. The method also includes reallocating the decremented initial transmission power of the first channel to one or more other channels.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: August 4, 2009
    Assignee: AT&T Intellectual Property II, LP
    Inventors: Richard Henry Erving, Lalitha Sankaranarayanan