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| Number | Title | Issue Date |
| 7899085 | Ranging between radios using pseudo time of arrival sequence Systems and methods for refining the determination of the time of arrival (TOA) of given data. A portion of packet data is designated to be used as a pseudo TOA sequence. The packet information is modulated using, e.g., BPSK, and thereafter spread with a chipping st... | 03/01/2011 |
| 7724783 | System and method for passing data frames in a wireless network A method is provided for receiving a data frame in an ultrawide bandwidth network. In this method, a device receives an ultrawide bandwidth signal containing a data frame. The device then performs an acquisition operation during a first preamble in the data frame, a... | 05/25/2010 |
| 7693191 | System and method for receiving a multiple format wireless signal An apparatus (200) and method (300) for receiving a communications signal. A spread spectrum signal demodulator (210) is adapted to demodulate a packet header (110) of a data packet (102) that is communicated by a wireless communic... | 04/06/2010 |
| 7515615 | Systems and methods for pseudo-random signal generation in a multi-carrier communications system The present invention provides systems and methods for pseudo-random signal generation in a multi-carrier communications system. In embodiments, a transmitter includes a pseudo-random bit sequence (PRBS) generator and Medley signal generator. The PRBS generator can ... | 04/07/2009 |
| 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 |
| 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 |
| 7426391 | Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to... | 09/16/2008 |
| 7366414 | Method and apparatus utilizing tunable differential group delay A method and apparatus for utilizing tunable differential group delay with at least a component of a fiber optic transmission system includes providing a tunable differential group delay system that is optically connected to a component of the fiber optic transmissi... | 04/29/2008 |
| 7366154 | Forward error correction scheme for high rate data exchange in a wireless system A transmitter/receiver system for high data transfer in a wireless communication system includes a physical layer processor that comprises an FEC coder, a demultiplexer and a plurality of modem processors. The FEC coder applies error correction codes to the high dat... | 04/29/2008 |
| 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 |
| 7324559 | Centralized synchronization for wireless networks This invention synchronizes the sample clocks of an entire wireless network from a single central base station. Unlike a conventional digital radio network where every terminal must have a synchronization circuit in its receiver to adjust the sample clock, each of t... | 01/29/2008 |
| 7301969 | OFDM transmitting apparatus, receiving apparatus and transmitting system and signal structure of transmission signal for use in the same A transmitting system wherein a transmission signal composed of main data and a TMCC signal having a SYNC pattern indicating the header portion and a bit pattern indicating setting information of the main data is transmitted and received. In the transmitting apparat... | 11/27/2007 |
| 7289588 | 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 -M×N preamble sequence, where M×N is less than A, by using... | 10/30/2007 |
| 7277458 | Apparatus and method for tracking a phase of a pseudo-random noise (PN) sequence of a pilot signal in a mobile terminal An apparatus and method are disclosed for acquiring by a mobile terminal a pseudo-random noise (PN) sequence of a pilot signal received from a base station by means of a searcher, designating a phase of the acquired PN sequence as a reference phase to track the phas... | 10/02/2007 |
| 7239707 | Staggered pulse acquisition method and apparatus A transmitter employing a cryptographic algorithm and key generates and transmits a staggered pulse signal that includes a plurality of high-power pulses that are part of a pseudonoise (PN) code. The high-power pulses are separated by a group of low-power chips and ... | 07/03/2007 |
| 7230910 | Optimal channel sounding system A channel sounding system employs orthogonal sequences to meet the Cramer-Rao bound in estimating the channel and achieves considerable simplification of the structure necessary to perform the channel sounding. These advantages are achieved by developing orthogonal ... | 06/12/2007 |
| 7227887 | Apparatus and method for moving PN hypothesis in high speed searcher There is provided a PN (Pseudorandom Noise) hypothesis moving apparatus and method in a high speed searcher. In the PN hypothesis moving apparatus, a PN sequence generator system has a PN sequence generator for generating a PN sequence and a PN state register for st... | 06/05/2007 |
| 7224716 | Communication methods and apparatus employing spread spectrum techniques and doppler-tolerant polyphase codes A communication apparatus and method that includes generating a series of successive spread-spectrum signals formed through the concatenation of a direct sequence spread spectrum code with a Doppler Tolerant Polyphase Code (DTPC) is herein disclosed. By transmitting... | 05/29/2007 |
| 7221664 | Transmittal of heartbeat signal at a lower level than heartbeat request A communication system, such as a wireless CDMA system, detects markers with fewer errors by having field units transmit the markers at different power levels (e.g., 9 dB for one marker and 11 dB for another marker). The difference in power levels of the markers all... | 05/22/2007 |
| 7193984 | Method for determining a time offset of a CDMA signal A method is described for determining a time offset of a CDMA signal incurred during transfer. For each of a plurality of time offset estimates, the received chip sequence is multiplied with a conjugate complex scrambling code that is shifted by a number of chips ac... | 03/20/2007 |
| 7190691 | Method of controlling timing for uplink synchronous transmission scheme A method of controlling timing for an uplink synchronous transmission scheme is disclosed, including combining time alignment bit (TAB) information transmitted received during a predetermined period, determining a timing renewal value based on the combination, and c... | 03/13/2007 |
| 7173946 | Multimedia multiplexing method A multiplexing method for multimedia communication is provided, which is compatible with the H.223 protocol by changing a header of a multiplex protocol data unit (MUX-PDU). The multiplexing method includes the steps of encoding media data, and multiplexing the medi... | 02/06/2007 |
| 7173958 | Method for cell search under effect of high clock offset The present invention discloses a cell search method for a CDMA system, using a three-stage cell search. The method comprises matching an incoming signal from the base station, wherein the frequency of the incoming signal having an uncertain range; over-sampling the... | 02/06/2007 |
| 7133398 | System and method for asynchronous communications employing direct and indirect access protocols A communication access protocol improves the accessibility of devices operating on an asynchronous network (100), while supporting reduced power consumption. The network (100) includes a mediation device (130) for facilitating communications amo... | 11/07/2006 |
| 7116698 | Generator of repetitive sets of spread spectrum sequences A generator of repetitive sets of spreading sequences comprising element (20), for counting and for forming an address and a table (30) containing L sets of S sequences, wherein the address contains q=1+log2S bits, in which one set among L (... | 10/03/2006 |
| 7110438 | Method and apparatus for cell search for W-CDMA with non-ideal sampling The invention discloses a cell search method for a CDMA system for a three-stage cell search procedure. The cell search method have the steps of matching of incoming signals by a chip matched filter; over-sampling the incoming signals N times against a chip rate by ... | 09/19/2006 |
| 7110465 | Noise canceling method and apparatus In a noise canceling method and an apparatus therefor which notices the colored noise looked macroscopically, positively cancels the dominant noise component in the low frequency band, shifts the S/N value to plus, and can extract the reception signal buried in the ... | 09/19/2006 |
| 7106787 | Acquisition matched filter for W-CDMA systems providing frequency offset robustness A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal acquisition procedure performed in the receiver. In operation, a Stage... | 09/12/2006 |
| 7107420 | Apparatus and method to adjust data transfer rate A method to adjust the data transfer rate for one of (N) primary backup appliances. The method forms by a first primary backup appliance at least one consistent transactions set. The first primary backup appliance receives the (n)th status signal, and the (n+1)th st... | 09/12/2006 |
| 7103085 | Wireless communications system with secondary synchronization code based on values in primary synchronization code A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchroniza... | 09/05/2006 |
| 7095856 | Method and apparatus to maintain encryption synchronization in a multi-modulation TDM system Encryption synchronization (e-sync) is maintained between a transmitter (104) and one or more receivers (102) in a multi-modulation TDM system (100) where information is communicated in slots (402) comprising a slot header (404) an... | 08/22/2006 |
| 7095757 | System and method for optimizing terrestrial signal acquisition in a communication system A system optimizes terrestrial signal acquisition in a communication system by initially determining whether a first synchronization signal is available from a first ensemble, which has an associated first programmed content of a terrestrial signal. Next, when the f... | 08/22/2006 |
| 7079855 | Method for operating a GSM mobile radio system The invention relates to a method for operating a GSM mobile radio system, according to which at least one transmitter, which is allocated to a reference time generator, emits a signal including information concerning a reference time. The signal including the afore... | 07/18/2006 |
| 7061966 | Frame synchronization and scrambling code indentification in wireless communications systems and methods therefor A mobile wireless communications device and methods therefore, including receiving a signal (710), storing a portion of the received signal (730), identifying all possible pilot signals by determining slot boundary information for the stored signal por... | 06/13/2006 |
| 7058090 | System and method for paralleling digital wrapper data streams A system and method are provided for paralleling data streams in a G.709 network of connected integrated circuits. The system comprises a demultiplexer for receiving a first digital wrapper data stream having a first data rate. The demultiplexer demultiplexes the fi... | 06/06/2006 |
| 7054350 | Method and system for acquiring pseudo-noise (PN) decade-code phase A method and system for synchronizing the PN phase of a pseudo-noise (PN) coded signal with a phase of a master PN decade-code is provided. The method includes the steps of associating the master PN decade-code initialization t0 with a first time zone ref... | 05/30/2006 |
| 7050466 | Apparatus and method for acquiring multi-user signal synchronization in code division multiple access system An apparatus and method for acquiring multi-user signal synchronization in a CDMA system is disclosed. In a preferred embodiment, pilot signals are generated using different PN seeds and the generated pilot signals are aligned to thus be transmitted within a predete... | 05/23/2006 |
| 7046698 | Communicating apparatus and communicating method A communicating apparatus performs an asynchronous communication with a base station. The communicating apparatus is provided with: a receiving device for receiving a down link signal, which is transmitted from the base station and in which a division signal is inse... | 05/16/2006 |
| 7042854 | Method and apparatus for acquiring a synchronization signal A method and system for acquiring a time division multiplexed synchronization signal in a satellite communication system is provided. The signal is provided as a series of frames with beacon signals time division multiplexed into at least one time slot of each frame... | 05/09/2006 |
| 7012936 | Initializing method and data transmitter A first initialization pattern signal is a signal in which a maximum signal level and a minimum signal level appear alternately, and a second initialization pattern signal is a signal in which all signal levels appear in a predetermined arrangement. In a ring-shaped... | 03/14/2006 |
