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7616717 |
Coarse timing synchronization
A system for determining the burst start timing of a signal includes logic configured to receive the signal, generate correlation moduli and generate a first timing output based on the correlation...
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7616716 |
Synchronisation in a receiver
A radio receiver is suitable for use in an OFDM wireless communications system, in which it is necessary to identify a timing point at a start of a frame. In order to ensure optimum performance of...
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7616715 |
Method and system for estimating the speed of a mobile device in a network
A method for estimating the speed of a mobile device in a network is provided that includes selecting a correlation length from a plurality of possible correlation lengths. A correlation result is...
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7616714 |
Process and device for the prediction of noise contained in a received signal
A device and method for predicting noise in a signal that is received by a digital receiver is provided. The device includes an autocorrelation function determination device and a noise predictor...
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7616695 |
MIMO equalizer design: an algorithmic perspective
A receiver in a MIMO-OFDM system may estimate the transmitted signal by performing a QR decomposition on the channel response matrix. The receiver may utilize Givens rotations to perform the...
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7613257 |
Synchronizing method for impulse radio network
A method to synchronize impulse radio signal in a receiver based on a cross-correlation between an input signal and a template pulse train is described. The method comprises the steps of receiving...
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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...
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7609773 |
Method of determining the location of the FFT window and the delay spread for the platinum broadcast channel estimator
In one embodiment, the invention comprises a channel estimation method, comprising determining a FFT window position, and calculating a delay spread. In another embodiment, the step of determining...
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7606338 |
Analog correlator for very high speed data communication
An analog correlator for very high speed data communication, including a single transmission line receiving an input signal and used as a signal delay circuit, a plurality of analog multipliers...
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7606337 |
Enhancing signals
Described herein is a method of enhancing signals received by a receiver in a mobile telecommunications network. The method comprises correlating the received signals to produce a correlation and...
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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 R 1 , serial bit-sequences of a code of length N=P*R 1 . In a first-level of...
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7602864 |
Method and apparatus for predicting CCK subsymbols
A correlator comprises a plurality of phase rotators, a plurality of combining modules, a plurality of computation modules, and a selection module. The plurality of phase rotators selectively...
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7602863 |
Method and apparatus for providing iterative timing recovery
A method includes the steps of receiving a signal indicative of data bits, and performing per survivor processing-iterative timing recovery (PSP-ITR) on the received signal to generate...
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7602854 |
Method of receiving of OFDM signal having repetitive preamble signal
A method of receiving an orthogonal frequency division multiplexing (OFDM) signal. The method includes receiving sample signals from the OFDM signal, providing reference sample signals, calculating...
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7602852 |
Initial parameter estimation in OFDM systems
A coarse estimate of a location of an information carrying part of a symbol in a received signal in a telecommunication system is generated. This involves generating correlation values by...
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7602840 |
Acquisition of a gated pilot
Systems and techniques to acquire a gated pilot signal by searching for a first gated pilot signal, deriving timing information from the search for the first gated pilot signal, and searching for a...
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7599452 |
Method and system for applying Viterbi type PSK demodulation for optimum correlation of GPS signals
A method and system of improving sensitivity in the demodulation of a received signal over an arbitrary measurement time epoch, the method comprising the steps of: correlating the received signal...
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7596168 |
Diversity receiving apparatus, controlling method of the same, and computer-readable medium containing program therefor
A diversity receiving apparatus receives first and second reception signals and is constituted by including one or more phase shifters that generate one or more third signals having phases...
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7596167 |
Allocation method, network element, module and user device
The invention is related to a network element, comprising: means for receiving feedback information from the user device; means for creating a first orthogonality measure by using the feedback...
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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...
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7590198 |
Impulse-based communication system
A synchronization acquisition method for impulse-based communication including synchronizing received information with a first pulse signal having the same period as the transmit information...
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7587016 |
MIMO timing recovery
Multiple-input-multiple-output (MIMO) timing recovery. A novel approach is presented to perform timing recovery when processing the multiple received signals within a MIMO communication device....
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7586837 |
Acquisition of a gated pilot signal
Systems and techniques are disclosed detecting an embedded signal which includes producing a plurality of first correlated values from a portion of the first signal and a second signal,...
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7583764 |
Versatile system for interference tolerant packet detection in wireless communication systems
The present invention provides a system for obviating interference effects in packet detection within a wireless communications network. A plurality of reference signals is provided—a first of...
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7583761 |
Channel estimation for wireless systems without matrix inversion
In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using...
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7583758 |
Carrier detection applicable for SISO, MIMO, MISO, and SIMO communications
Carrier detection applicable for SISO, MIMO, MISO, and SIMO communications. A novel approach is presented to perform carrier detection for a signal found in any of a wide variety of communication...
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7583740 |
Apparatus and method for tracking sampling clock in multi-carrier communication system
An apparatus and method for tracking a sampling clock are disclosed. The apparatus includes a compensating circuit compensating phases of a first and a second received symbols according to a...
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7580479 |
Receiving method and receiver
Baseband BB input units input baseband received signals. An initial weight data setting unit sets weighting coefficients to be utilized in the interval of a training signal as initial weighting...
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7580464 |
Method for detecting UWB pulse sequences and analog detection means suitable for this purpose
The present invention relates to a method for transmitting data in the form of at least one sequence of Np pulses over Np time windows Tf, each pulse being enclosed within a time chip Tc whose...
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7580450 |
Parameter estimator with dynamically variable integration time
A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator...
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7580449 |
DSSS and OFDM two-way waiting reception method and wireless LAN apparatus
A DSSS and OFDM two-way waiting reception method is disclosed. The reception method includes the steps of (a) maintaining a two-way waiting state if none of an RSSI trigger, an OFDM search trigger,...
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7577218 |
Signal acquisition apparatus and method for reducing false alarm rate
A signal acquisition apparatus and method for reducing a false alarm rate are disclosed. The apparatus includes a comparator for detecting a first peak by comparing a correlation value of a...
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7577217 |
Detector for clock phase and carrier phase
A detector for a receiver generates a clock phase detection signal and a carrier phase detection signal from of a plurality of clock polyphase signals of an oversampled signal. The detector...
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7577216 |
Guard interval and FFT mode detector in DVB-T receiver
For determining FFT and GI (guard interval) modes within a receiver, a correlation signal is generated from an in-phase and quadrature (I/Q) stream. An plurality of GI mode division signals are...
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7577188 |
Physical layer and MAC enhancements using complex sequences on a wireless channel
A method and apparatus to enable physical layer MAC layer enhancements while at the same time allowing complete backward compatibility with existing protocols. The method and apparatus determine on...
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7570721 |
Apparatus and method for multi-phase digital sampling
A method and apparatus for determining a relationship between an input signal frequency and a reference signal frequency is envisioned. The system derives a plurality of internal reference signals...
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7567637 |
Wireless communication system and method with frequency burst acquisition feature using autocorrelation and narrowband interference detection
A wireless communication system is provided that detects a frequency burst (FB) through analysis of the autocorrelation function of received signals. The system can accommodate the relatively large...
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7567636 |
Method and apparatus for performing signal correlation using historical correlation data
A method and apparatus for estimating a satellite signal parameter in a satellite positioning system receiver is described. In an example, a plurality of correlation results between a satellite...
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7561630 |
Transmission parameter recognition apparatus and method thereof
A transmission parameter recognition apparatus and the method thereof are disclosed. The transmission parameter recognition apparatus includes a correlation function processing module, a...
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7558346 |
Symbol detector based on frequency offset compensation in ZigBee system and symbol detecting method thereof
The invention relates to a symbol detector for detecting symbols received in a receive modem of short-range wireless personal area network of a ZigBee system (IEEE 802.15.4). An OQPSK short-range...
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7558345 |
Apparatus and method for synchronizing symbol timing synchronization applicable to orthogonal frequency division multiplexing (OFDM) receiver
An apparatus and method applied to an orthogonal frequency division multiplexing (OFDM) receiver performs symbol timing synchronization by correlation between channel impulse responses. The...
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7555072 |
Method and circuit for detecting guard intervals in OFDM communication systems
A circuit for detecting a guard interval in an orthogonal frequency division multiplication (OFDM) communication system, using two successive autocorrelation calculations for a received sample...
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7555034 |
Apparatus and method for detecting timing error based on cyclic correlation
Provided is an apparatus and method for detecting timing errors based on characteristics of cyclic correlation. The apparatus and method can detect the timing errors of many users by using the...
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7551698 |
Derivation of eigenvectors for spatial processing in MIMO communication systems
Techniques for deriving eigenvectors based on steered reference and used for spatial processing. A steered reference is a pilot transmission on one eigenmode of a MIMO channel per symbol period...
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7551697 |
Reduced complexity soft-output noncoherent continuous phase demodulator systems
A method and system of demodulating a received transmission is disclosed. The method comprises disassembling a symbol sequence into a before sequence, a current symbol, and an after sequence. The...
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7551696 |
Method and apparatus of detecting ISI/ICSI in an OFDM system
A method for detecting inter-symbol interference (ISI) in an OFDM system includes the steps of computing a first correlation value representing the correlation between a plurality of first signals...
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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...
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7545853 |
Method of acquiring a received spread spectrum signal
A method of acquiring a received spread spectrum signal, especially a GPS signal, is disclosed together with a spread spectrum signal receiver and a cellular telephone incorporating such a...
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7545849 |
Signal spectrum spreading and combining system and method
The present invention facilitates efficient and effective combination of multiple spread spectrum signals into a single stream. A spread spectrum signal combination system and method of the present...
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7545845 |
Wireless communication system, wireless transmitter, wireless receiver, wireless communication method, wireless transmission method and wireless reception method
The transmitting side encodes a digital signal to be transmitted by using a code not containing any DC component, and transmits the digital signal without using any carrier. The receiving side...
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