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| Number | Title | Issue Date |
| 8040993 | Signal processing method in MIMO system and apparatus thereof Disclosed is a signal processing method and apparatus in MIMO system. In a mobile communication system having a plurality of transmitting antennas, the present invention includes the steps of receiving a feedback signal including status information of at least one c... | 10/18/2011 |
| 7945008 | Systems and methods for lattice enumeration-aided detection Embodiments provide systems and methods for improved multiple-input, multiple-output (MIMO) detection comprising generating at least one list of candidate vectors by employing lattice enumeration which approximates hyperellipsoid detection search space and calculati... | 05/17/2011 |
| 7760836 | Skew-correcting apparatus using external communications element An apparatus for determining the amount of skew to be injected into a high-speed data communications system of including a plurality of lanes having a data bus per lane, relative to a reference lane, for system skew compensation. By knowing the relative amount of sk... | 07/20/2010 |
| 7706494 | Wireless communication apparatus A wireless communication apparatus includes: a transmitter which sends transmitted data while mixing it with a carrier; a receiver which receives the transmitted data sent from the transmitter while mixing it with the carrier; a spreading waveform generator which ge... | 04/27/2010 |
| 7558356 | Providing global positioning system (GPS) timing signals to remote cellular base stations In a cellular network, a GPS receiver includes circuitry that modulates a global positioning system (GPS) timing pulse signal with a carrier signal and transmits the modulated signal to one or more remote base stations. When the modulated timing pulse signal is rece... | 07/07/2009 |
| 7433438 | Vestigial side band synchronization signal detection circuit A vestigial side band (VSB) synchronization (sync) signal detection circuit and method of generating a VSB sync signal is described. The circuit may include means for generating a first control signal related to sync signal generation, based on receipt of a selected... | 10/07/2008 |
| 7430263 | System and method for timing correction for fast PN acquisition A timing correction system for fast PN acquisition is provided. The system includes a signal sampler for testing any incoming signal and a real-time clocker coupled to the signal sampler. A parallel correlator is coupled to the real-time clocker for searching for a ... | 09/30/2008 |
| 7430196 | Transmission systems A receiver comprising a processor having an input to receive a sequence of transmission frames conforming to a transmission protocol to represent payload data, a memory arranged to store and to provide to the processor a transmissi... | 09/30/2008 |
| 7430262 | Frame synchronization method and system A method and system for frame synchronization in a digital data transmission. A synchronization word is selected that is suitable for good correlation in a receiver detector. Either traffic bits or control bits are interleaved within the synchronization word in a pr... | 09/30/2008 |
| 7418248 | Signal reception device, signal transmission device, radio communication system, and signal reception method A signal reception device is disclosed that is able to improve interference cancellation capabilities even when signals having different center frequencies exist on the same frequency band. The signal reception device includes an interference suppression unit to gen... | 08/26/2008 |
| 7412018 | Rapid acquisition synchronization sequences for direct sequence spread spectrum systems using code time offsets In a wireless communication system which includes a synchronization signal generator which generates a synchronization sequence, an RF transmitter which transmits the synchronization signal, and one or more receiver that receives the signal, where the synchronizatio... | 08/12/2008 |
| 7403583 | System and method for predictive synchronization for locating interleaving frames and demodulation training sequences A system and method for using Psuedo-Noise (PN) phase to determine frame start of a data frame is provided. The system and method includes at least two PN component codes, wherein the at least two PN component codes are relatively prime. A received PN composite enco... | 07/22/2008 |
| 7386066 | Method and device for detecting pulses of an incident pulse signal of the ultra wideband type A detection device includes an antenna for receiving an incident signal, and for delivering a base signal. A comparator receives the base signal and provides an intermediate signal representative of the sign of the base signal relative to a reference signal. A sampl... | 06/10/2008 |
| 7369600 | Burst communications apparatus and method using tapped delay lines A communications apparatus and method use tapped delay lines as multiplexers and demultiplexers. In one embodiment, a receiver (100) uses a tapped delay line (110) as a demultiplexer to acquire a burst communication at very high data rates in the range... | 05/06/2008 |
| 7366090 | Apparatus and method for generating a preamble sequence in an OFDM communication system A method for generating a preamble sequence in an orthogonal frequency division multiplexing (OFDM) communication system having A subcarriers in a frequency domain. The method comprises generating a length-2×M×N preamble sequence, where 2×M×N is less than A, by ... | 04/29/2008 |
| 7366268 | Selective data inversion in ultra-wide band communications to eliminate line frequencies A method for generating an ultra-wide-band (UWB) having a reduced discrete frequency component defines frame synchronization signal and an inverted frame synchronization signal. As each frame is generated, the method randomly selects the frame synchronization signal... | 04/29/2008 |
| 7366195 | Apparatus and method for efficiently transmitting and receiving multicast data Apparatuses and methods for efficiently transmitting and receiving multicast data having a scalable data structure preferably provide for the transmission of a first data stream at a basic data rate using a first modulation scheme that can be received by all receive... | 04/29/2008 |
| 7362837 | Method and apparatus for clock deskew A clock signal is deskewed relative to a data signal by sweeping a sampling point in time and sweeping an amplitude offset. Bit error measurements are made at each sampling point in time and compared. Bit error measurements may be made by comparing received data to ... | 04/22/2008 |
| 7355467 | Physical layers Improvements to the physical layer are provided, for example a test circuit that does not introduce further skew into critical clock signals. A boundary scan test circuit is also provided used to isolate an integrated circuit for applying test vectors or circuit bra... | 04/08/2008 |
| 7353446 | Cyclic redundancy check circuit for use with self-synchronous scramblers The present invention provides a circuit for detecting and correcting errors in a bit stream. At least two logic gates receive inputs from a plurality of circuit elements. The plurality of circuit elements are coupled to receive and store a portion of a bit stream. ... | 04/01/2008 |
| 7349503 | Adaptive interference immunity control Wireless local area networks must work in less than ideal environments, including environments having externally and internally generated interfering RF signals. Interfering signals can cause significant problems with signal detecting, amplifier gain adjustment, and... | 03/25/2008 |
| 7342538 | Asynchronous local position determination system and method In a local positioning system, the land-based transmitters include free running oscillators or oscillators free of clock synchronization with any remote oscillator. A reference receiver receives the ranging signals from different transmitters and generates timing of... | 03/11/2008 |
| 7342528 | Circuit and method for reducing electromagnetic interference A spread spectrum system having a self-oscillating delay-line digital pulse width modulator and a method for mitigating electromagnetic interference. The spread spectrum system has a pseudo-random pattern generator connected to a digital-to-analog converter, which i... | 03/11/2008 |
| 7336597 | System and method for two channel frequency offset estimation of OFDM signals An orthogonal frequency division multiplexed (OFDM) receiver achieves improved frequency synchronization by generating a fine frequency offset of an OFDM packet with a two-channel frequency offset estimation scheme. Concurrent autocorrelations are performed with tra... | 02/26/2008 |
| RE40111 | Wireless alarm system A remote power meter monitoring system using spread spectrum transmitters, fast frequency shift keying, spread spectrum receivers and a computer. The spread spectrum transmitter uses a chip code generator, preamble register, address register data register and oscill... | 02/26/2008 |
| 7333529 | Apparatus and method for measurement of communication quality in CDMA system In order to perform synchronization detection with high speed, high precision and high reliability and to measure communication quality (propagation characteristics) at high precision and high efficiency, a mobile station (202) includes synchronization detect... | 02/19/2008 |
| 7332950 | DLL measure initialization circuit for high frequency operation A memory device, delay lock loop circuit (DLL) and DLL reset circuitry are described. The DLL includes a shift register and a measured delay for pre-loading the shift register. The reset circuitry selectively filters a clock signal propagation through the measured d... | 02/19/2008 |
| 7334078 | Method and system for handling streaming information One aspect of the present invention leads to a method of handling streaming information. The method includes receiving the streaming information and analyzing the streaming information to locate one or more points of interest in the streaming information. An index o... | 02/19/2008 |
| 7330452 | Inter-frequency neighbor list searching Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and ... | 02/12/2008 |
| 7324606 | Computationally efficient system and method for channel estimation A system and method is provided for determining a channel estimate utilizing partial channel estimates to provide an aggregated channel estimate. A partial channel estimate is determined upon receipt of a data burst, such that a different subset of the channel estim... | 01/29/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7317776 | Efficient pseudo-noise sequence generation for spread spectrum applications The invention solves the problem of efficiently generating pseudo noise sequences with an arbitrary offset delay. Novel and improved architectures are used, based on the matrix-vector pseudo noise generators. A first embodiment of this invention includes a plurality... | 01/08/2008 |
| 7313173 | Correlation detection method and apparatus, transmission diversity detection method and apparatus, each method and apparatus for detection within a small time unit One code is generated by combining (including addition) 2 or more codes, correlation detection method which detects the correlation by multiplying such a generated code by the reception data. In communication system based on W-CDMA method, first spreading code (a·C... | 12/25/2007 |
| 7305060 | Spread range control apparatus A spread range control apparatus of the present invention controls a clock generator, which generates a spread spectrum clock based on setting of spread data, so as to regulate a spread range of the spread spectrum clock. The spread range control apparatus includes:... | 12/04/2007 |
| 7304522 | Spread spectrum clock generator A spread spectrum clock generator includes a plurality of delay cells, wherein each delay cell includes at least one delayer receiving an external clock signal and causing a predetermined propagation delay to the received clock signal, and a controller transmitting ... | 12/04/2007 |
| 7305057 | Multichannel filter-based handheld ultra wideband communications A multichannel filter-based handheld UWB communication transceiver is presented for outdoor operations. Using eleven multichannels with multicarrier modulations, the invented handheld UWB communication transceiver can transmit and receive UWB signals at a data rate ... | 12/04/2007 |
| 7301915 | System and method for resolving frequency and timing uncertainty in access transmissions in a spread spectrum communication system A method for reducing the number of required frequency and time hypotheses to acquire an access transmission in a satellite communication system. By reducing the number of required hypotheses, the amount of hardware required to acquire the access transmission is red... | 11/27/2007 |
| 7298779 | Fast code acquisition method based on signed-rank statistic The present invention relates to the fast code acquisition methods based on signed-rank statistic. In more detail, it presents novel detectors required for PN (PN) code acquisition in DS/SS system. In accordance with the present invention, first, the LOR (LOR... | 11/20/2007 |
| 7295857 | Method and apparatus for performing acquisition in power save mode for wireless communication systems Techniques to efficiently attempt acquisition of a packet data system (e.g., an IS-856 system). If a terminal has acquired one or more channels in a voice/data system (e.g., an IS-2000 system), then it can attempt acquisition on channels in the packet data system th... | 11/13/2007 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
