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7609751 Method and apparatus to initiate communications between an unknown node and an existing secure network  
A first node initiating communications with a second node already in a secure network sends a discovery burst having a preamble portion and a payload portion. The preamble portion is sent at a...
7602835 Multi-rate spread spectrum composite code  
A correlator despreads a P/N long code constructed from two or more constituent codes A, B, C having N, M and L elements respectively. In a third stage, L filter taps decorrelate elements of the...
7602834 System and method for determining a fine frequency offset of a received signal  
A system and method for determining a fine frequency offset of a composite code spread spectrum signal is disclosed. The method includes despreading at least one component of the composite spread...
7590396 Multimode communication device with shared signal path programmable filter  
A multimode communication device with a shared signal path programmable filter and a method for utilizing a shared signal path programmable filter in a multimode communication device. Various...
7590164 Method and apparatus for efficient use of communication resources in a communication system  
The frame of data is partitioned into a plurality of portions of data symbols. A plurality of channel elements is assigned to demodulate data symbols of correspondingly the plurality of portions of...
7580470 Apparatus for recovering E8-VSB map information and method thereof  
A Kerdock decoder of the present invention generates correlation reliability from a relation between correlation values to output together with a Kerdock-decoded map data. A map deciding unit...
7577168 Method for detecting symbol synchronization and apparatus thereof  
An apparatus for detecting symbol synchronization in a received signal including a first preamble and a second preamble which is consecutive to the first preamble, the apparatus including a first...
7567533 Packet detection system, packet detection device, and method for receiving packets  
A packet detector for a multi-band orthogonal frequency division multiplexing system includes a plurality of packet detection units each corresponding to a time frequency code for detecting packets...
7564891 Method of using long cellized codes in a joint detection system  
The invention discloses a method of applying a long cell-code in a joint detection system. At transmitters, multiples of the spreading code (spreading factor) is taken as the length of the long...
7545854 Doppler corrected spread spectrum matched filter  
A method and apparatus for a spread spectrum matched filter with Doppler correction suitable for using in a radio frequency receiver. The system includes a signal sampler operable to receive signal...
7526010 Doped multi-rate spread spectrum composite code  
A composite code is made for example by exclusive-OR'ing each real element of a first constituent code A with each element of a second constituent code B to obtain a basic composite code. To...
7515653 Digital broadcasting receiver, driving method thereof, and self-diagnosis method thereof  
A digital broadcasting receiver, a driving method, and a self-diagnosis method thereof, are provided. The digital broadcasting receiver includes: a digital demodulator for demodulating a digital...
7508865 System and method for tracking an ultrawide bandwidth signal  
A system and method for fast synchronization of an incoming signal with a UWB receiver. The present invention synchronizes a UWB receiver with an incoming signal. The present invention correlates a...
7508860 Pulse signal generator for ultra-wideband radio transception and radio transceiver having the same  
Provided are a pulse signal generator for UWB radio transception and a radio transceiver having the same. The pulse signal generator includes: an envelope generator generating a plurality of...
7508796 Wireless base station, wireless frames synchronization detection method used therein, and recording medium on which program therefor is recorded  
In a baseband processing unit in a node-B, a path search circuit includes a path capture unit, path track transfer unit, and channel estimation unit, all of which are primarily provided for the...
7499509 Receiver for compensating nonlinearly distorted multicarrier signals  
An apparatus for compensating nonlinearly distorted multicarrier signals, a multicarrier signal receiver using the same, and a method therefor are provided, where the apparatus for compensating...
7492808 Decoding method using adaptive step-size algorithm for a space-time coded DS-CDMA system  
Disclosed is a method for decoding received signals on communication channels between at least one transmit antenna and plural receive antennas in a space-time coded direct sequence (DS)-CDMA...
7492807 Pseudo-random bit sequence (PRBS) synchronization for interconnects with dual-tap scrambling devices and methods  
A method for synchronizing interconnects in a link system according to various embodiments can include receiving input data at a transmit side, the transmit side including at least one...
7489721 Simplified block linear equalizer with block space time transmit diversity  
The present invention is a method and system for receiving data transmitted using block space time transmit diversity (BSTTD) in a code division multiple access (CDMA) communication system. The...
7474688 System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher  
System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher. A preferred embodiment comprises the specification of a hypothesis for a particular...
7454209 Adapting operation of a communication filter based on mobile unit velocity  
A method and apparatus are provided for adapting a pilot filter based on the velocity of a wireless communication device (WCD) in relation to a wireless network infrastructure. The pilot filter is...
7447259 System for direct acquisition of received signals  
Signal processing architectures for direct acquisition of spread spectrum signals using long codes. Techniques are described for achieving a high of parallelism, employing code matched filter banks...
7447254 Self-correlating pseudo-noise pairing  
A method of transmitting communications codes is used in spread spectrum communications systems. The method includes transmitting a first pseudo-noise code, and transmitting a second pseudo-noise...
7424050 Matched filter circuit and correlation calculation method  
There are provided input route selecting means 711 - 713 and 723 - 725 for selecting, in accordance with the oversampling phase, input routes along which reception data and codes are to be...
7418065 Multicarrier receivers and methods for detecting cyclic prefixes having unknown lengths  
A multicarrier receiver sequentially correlates two training symbols to determine a length of a cyclic prefix associated with each of the training symbols.
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...
7412014 Timing-adjusting method and apparatus, and diversity receiving method and apparatus  
An A-D conversion unit performs analog-to-digital conversions on baseband signals. A correlation processing unit carries out a correlation processing. A power computing unit computes the power of...
7406113 Integrated circuit for code acquisition  
A semiconductor integrated circuit for processing a plurality of received broadcast signals, such as GPS signals, is operable in two modes: acquisition and tracking. In an acquisition mode, sample...
7397842 Method and apparatus for combining weight computation in a DS-CDMA RAKE receiver  
A RAKE receiver circuit generates combining weights based on channel estimates and combining statistics that comprise channel coefficient statistics, noise statistics, and channel estimation error...
7394873 Adaptive channel estimation for orthogonal frequency division multiplexing systems or the like  
Briefly, in accordance with one embodiment of the invention, a channel estimator may be adapted to provide a channel estimate based at least in part on an estimated delay spread. The channel...
7388899 Spreading code structure for ultra wide band communications  
The ultra wide band communication system of the present invention includes a transmitter (station) and a receiver (station). The transmitter and the receiver employ spreading code comprised of code...
7386035 Method of compensating for energy loss and eliminating inter-symbol interference and inter-chip interference and rake receiver for WLAN adopting the same  
Provided is a method of compensating for energy loss and eliminating inter-symbol interference (ISI) and inter-chip interference (ISI) in wireless signals, and a rake receiver for wireless LANs...
7359425 Ultra-wideband transmitter and receiver, and ultra-wideband wireless communication method  
An ultra-wideband transmitter and receiver, and a ultra-wideband wireless communication method, which perform ultra-wideband wireless communication by a low-speed digital circuit having a low power...
7356094 Digital broadcast receiving apparatus  
A digital broadcast receiving apparatus for receiving a broadcast signal generated by combining sub signals modulated using a random sequence generated based on an initial value set in accordance...
7349498 Method and system for data and edge detection with correlation tables  
A system and method is disclosed for evaluating a data group of oversampled bits to detect edge transitions and for improving use of information available from a sampled data while maintaining...
7327780 Wireless communications systems and methods for multiple operating system multiple user detection  
The invention provides methods and apparatus for multiple user detection (MUD) processing that have application, for example, in improving the capacity CDMA and other wireless base stations. One...
7324585 System and method for performing symbol boundary-aligned search of direct sequence spread spectrum signals  
System and method for performing symbol boundary aligned searches of signals. A preferred embodiment comprises a search control unit (such as search control unit 725 ) that can determine a start...
7317753 Dynamic matched filter bank and its application in multi-channel spread spectrum communication systems  
A dynamic matched filter bank consists of a plurality of matched filters with either the reference signal for each matched filter changes with the time or the input signal to a matched filter is...
7315567 Method and apparatus for partial interference cancellation in a communication system  
A method of partial interference cancellation of a received signal that includes a first data component and a second data component is disclosed. The method includes the steps of determining a...
7301993 Channel estimation in a spread spectrum receiver  
A method and apparatus for channel estimation in a spread spectrum receiver include processing that begins by despreading a received spread spectrum complex baseband sample utilizing a pseudorandom...
7295624 Wireless system with hybrid automatic retransmission request in interference-limited communications  
A wireless receiver for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, wherein the signals comprise a...
7280624 Method and apparatus for noise threshold calculation in wireless communication  
Determination of the impulse position in a multipath channel in a noisy environment includes dynamically adjusting a threshold value when making comparisons against a signal property level.
7277470 Multi-user detection in an MC-CDMA telecommunication system  
A multi-user detection method and device for a receiver in a multi-carrier code division multiple access telecommunication system, each communication to or from a user of the system being coded...
7274729 Spread spectrum communication device and communication system  
A structure of a spectrum spreading communication device which solves the problem with the conventional spectrum spreading communication using Barker codes, etc., and limits the rise of the...
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...
7218665 Deferred decorrelating decision-feedback detector for supersaturated communications  
The present invention provides an efficient means of estimating symbols transmitted in a multi-user environment in overloaded or super-saturated conditions by employing a deferred decorrelating...
7200164 Packet-based multiplication-free CCK demodulator with a fast multipath interference cipher  
A complementary code keying (CCK) demodulator used in a RAKE receiver receiving CCK symbols in a multipath environment computes multipath interferences (MPIs) required for canceling intra-codeword...
7194021 Digital matched filter  
A digital matched filter receives an input signal in natural order, correlates the input signal against a code and generates a filtered output signal in a permuted order with respect to the input...
7187707 Synchronization code detecting apparatus for cell search in a CDMA system  
A synchronization code detecting apparatus is designed for synchronization code detection in cell search in a code division multiple access (CDMA) system. The synchronization code detecting...
7184465 Signal processing method and apparatus for a spread spectrum radio communication receiver  
A signal received by a base station is fed to a set of filters matched to spreading codes allocated to pilot channels originating from radio terminals. The outputs from the matched filters are...
Matches 1 - 50 out of 191 1 2 3 4 >