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| Number | Title | Issue Date |
| 8155168 | Inductive communication system with increased noise immunity using low-complexity transmitter A modulator for a communications system includes a spread spectrum coder and a pulse code modulator having a signal input port connectable to a signal output port of the spread spectrum coder. The modulator performs a robust and error free modulation and coding sche... | 04/10/2012 |
| 8149895 | Method and system for code reuse and capacity enhancement using null steering The number of users and data capacity of wireless systems are increased by employing apparatus and method for increasing the number of spreading codes available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes tha... | 04/03/2012 |
| 8139622 | System and method for generating and detecting the identifier sequence of the bandwidth-limited transmitter A system and method for generating and detecting identifier sequence of a bandwidth-limited transmitter are disclosed, comprising an identifier sequence generating portion and a detection portion. The identifier sequence generating portion comprises: generating a fr... | 03/20/2012 |
| 8098712 | Optical correlation apparatus and method Optical correlators are discussed, suitable for in-vehicle distance measurement. The correlators use modulation sequences based on maximal length sequences. A number of different modulation sequences are obtained by generator (32) from a single maximal length... | 01/17/2012 |
| 8054867 | Apparatus for transmitting data and additional information simultaneously within a wire-based communication system An apparatus is provided for transmitting data signals and additional information signals having partially overlapping frequency bands simultaneously within a wire based communication system over the same wired medium using a spread spectrum technique for modulating... | 11/08/2011 |
| 8045597 | Multi-path searching A method of multi-path searching in a cellular network is provided. The method carries out a correlation process over a predetermined integration period in relation to a first pilot signal received in connection with a first cell of the cellular network to generate ... | 10/25/2011 |
| 8027371 | Combine time multiplexed pilot (TMP) derotation with descrambling and despreading in data correlators used by rake receivers The invention provides a code modification circuit for receiving a descrambling/dispreading code at a first input pair thereof and a pilot derotation code at a second input pair thereof, and arranged to combine the codes to form a combined code for providing to a co... | 09/27/2011 |
| 7986724 | Digital audio/video broadcast on cellular systems A method for providing information to a plurality of wireless mobile communication devices. The method includes dedicating at least one channel of a plurality of spread spectrum data channels as a broadcast channel. The frequency and phase of a carrier signal and of... | 07/26/2011 |
| 7924906 | Spread-spectrum receiver An assembly of simultaneously transmitted electrically generated signals, which contains a subset of binary spreading-code sequences that are members of a large set of binary spreading-code sequences available to a particular node of a multi-node communication netwo... | 04/12/2011 |
| 7912113 | Techniques for estimating received signal strength and carrier to interference and noise ratio in OFDM systems A technique for determining a received signal strength indicator of a target base station at a subscriber station includes performing a discrete Fourier transform on a received signal to provide a transformed signal. In this case, the transformed signal occupies one... | 03/22/2011 |
| 7835421 | Electric detector circuit A detector is provided for determining the carrier frequency of symmetrical, direct sequence, spread spectrum (DSSS) signals. The DSSS signal is divided between two signal paths, one path containing a frequency band inverter and the other a time delay unit. The outp... | 11/16/2010 |
| 7830949 | Cross correlation circuits and methods Embodiments of the present invention include techniques for performing cross correlations. In one embodiment the present invention includes a cross correlation system for use in a communication system comprising a wireless receiver receiving a signal including a fir... | 11/09/2010 |
| 7773661 | Method and apparatus for monitoring a redundant (standby) transmitter in a radio communications system A method for monitoring a redundant (passive) transmitter, being, for example, part of a base station of a point-to-multipoint radio communications system transmits, during normal operation, a spread-spectrum signal over the redundant transmitter, the spread-spectru... | 08/10/2010 |
| 7773662 | Synchronizing to symbols received via wireless communications channel Synchronization techniques for reducing the effects of time dispersive wireless communications channels are presented. A synchronization technique for communications over a time dispersive wireless channel includes receiving a signal having at least identical first ... | 08/10/2010 |
| 7769076 | Method and apparatus for performing frequency synchronization A method and apparatus for performing frequency analysis of sub-epoch correlations to estimate an unknown frequency of a received signal is provided. The method includes forming a sequence of correlation values from a plurality of correlations performed over a perio... | 08/03/2010 |
| 7751463 | Method and apparatus for suppressing interference based on channelization code power estimation with bias removal Processing in a baseband processor is improved by estimating channelization code powers when processing received signals and reducing at least one of interference and noise power from the code power estimates. According to one embodiment of a wireless communication ... | 07/06/2010 |
| 7746916 | Method and apparatus for generating and transmitting code sequence in a wireless communication system A method of generating a code sequence in a wireless communication system is disclosed. More specifically, the method includes recognizing a desired length of the code sequence, generating a code sequence having a length different from the desired length, and modify... | 06/29/2010 |
| 7697593 | Multiple-input multiple-output (MIMO) timing synchronization using correlation with first and second known signal A timing synchronization detects a temporary timing in a manner such that the presence of a first known signal in the received packet signal is detected by performing correlation processing on the first known signal in the received packet signal. The timing synchron... | 04/13/2010 |
| 7672358 | Method and apparatus for performing signal correlation at multiple resolutions to mitigate multipath interference A method and apparatus for selecting a signal processing resolution. A received signal is processed using a first resolution. When a multipath condition is detected, the signal is processed using a second resolution. ... | 03/02/2010 |
| 7653121 | Power level measuring device and a mobile station A disclosed power level measuring device includes a power calculator for calculating power values based on correlation values between a received signal and known signals, for each of sampling times within a predetermined period; a time divider for switching connecti... | 01/26/2010 |
| 7643536 | Asynchronus communication system for remote monitoring of objects or an environment A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be ... | 01/05/2010 |
| 7643537 | Spread spectrum signal detection with inhibiting for known sidelobe locations A method and apparatus for detecting a spread spectrum signal is described. Signals can be detected using correlation techniques. When a signal is detected, declaring of signal presence is inhibited for offsets of signal parameters from the parameters of the detecte... | 01/05/2010 |
| 7639730 | Methods and apparatus for improving signal timing accuracy A technique for determining the time of arrival of a signal includes generating a spread spectrum signal with a number of code sectors, each including a periodic sequence of spread spectrum chips that corresponds to a predetermined correlation function. The periodic... | 12/29/2009 |
| 7636382 | Encoding Viterbi error states into single chip sequences A technique for receiving an error state in a single chip sequence in a wireless communications network is disclosed. The error state may comprise a Viterbi error state. The error state may be identified as a target code encoded in the single chip sequence, the targ... | 12/22/2009 |
| 7623562 | Initial synchronization acquiring device and method for parallel processed DS-CDMA UWB system and DS-CDMA system's receiver using the same Provided are an initial synchronization acquiring device and method in a parallel processed DS-CDMA UWB system and a DS-CDMA UWB system's receiver using the same. The initial synchronization acquiring device is constructed to include a correlator for correlating inp... | 11/24/2009 |
| 7613227 | Reverse link correlation filter in wireless communication systems A single, common correlation filter (CF) core is provided in a receiver for recovery of data from received code division multiple access (CDMA) signals. Signals are received over CDMA channels with different data rates, where the received signals include user inform... | 11/03/2009 |
| 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 varying frequency between high and low thresholds that are reflective of ... | 10/27/2009 |
| 7606292 | Sub-sequence accumulation filter and method A parallel correlator and method includes temporarily storing in a series of P sequence registers, each of length R1, serial bit-sequences of a code of length N=P*R1. In a first-level of processing, certain unique bit sequences are inverted to ... | 10/20/2009 |
| 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 third constituent code from the input received signal, leaving elements... | 10/13/2009 |
| 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 data symbols. The number of the plurality of portions of data symbol... | 09/15/2009 |
| 7586974 | Method and apparatus for rake finger allocation in a DS-CDMA receiver A Direct-Sequence Code Division Multiple Access (DS-CDMA) receiver and method of allocating probing correlators and combining correlators (fingers). A front-end processor converts received radio signals to baseband samples. Based on average path strengths, a control... | 09/08/2009 |
| 7558312 | Parallel correlator implementation using block integration for spread-spectrum communication An apparatus for processing spread spectrum signals digitized at a predetermined sampling frequency. The apparatus includes an intermediate frequency signal preprocessing unit, a plurality of parallel block integrators. The intermediate frequency signal preprocessin... | 07/07/2009 |
| 7496129 | Method and apparatus for space division multiple access receiver Methods and systems consistent with this invention receive a plurality of transmitted signals in a receiver having a plurality of receive elements, wherein each transmitted signal has a different spatial location. Such methods and systems receive the plurality of tr... | 02/24/2009 |
| 7474687 | Staged correlator A correlator has a feedback circuit having a first input coupled to an incoming data stream, a second input and an output. A data register is to store an incoming data stream having a number of candidate bits, the data register having an output coupled to the second... | 01/06/2009 |
| 7453920 | Code synchronization in CDMA satellite wireless communications system using uplink channel detection An uplink signal transmitted by a terminal is received by a satellite wireless communications system. The uplink signal includes a known information element, e.g., a reverse access channel (R-ACH) preamble, spread according to a spreading code specific to a componen... | 11/18/2008 |
| 7443938 | Method and system for synchronization between transmitter and receiver in a communication system A method and system for synchronization between a transmitter and a receiver in a communication system is provided. The receiver receives a plurality of signals from the transmitter. According to this method, a frequency burst is detected in the received signal at t... | 10/28/2008 |
| 7436878 | Method and apparatus for efficient carrier bin search for a composite spreading code A matched filter decorrelator is described for efficiently performing a carrier frequency search while despreading a P/N long code constructed from two or more constituent codes such as codes A, B, C. The received signal is phase rotated into a frequency bin and par... | 10/14/2008 |
| 7433391 | Spread-spectrum receiver with fast M-sequence transform A receiving system dynamically searches a communications band for transmissions of messages having the same nominal communications parameters, including the use of the same spreading code, but having potentially different specific frequencies and code-phases. The re... | 10/07/2008 |
| 7433390 | Received communication signal processing methods and components for wireless communication equipment A wireless transmit receive unit (WTRU) and methods are used in a wireless communication system to process sampled received signals to establish and/or maintain wireless communications. A selectively controllable coherent accumulation unit produces power delay profi... | 10/07/2008 |
| 7433384 | System and method for received signal prediction in wireless communications system Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Ra... | 10/07/2008 |
