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7209445 |
Method and system for extending the reach of a data communication channel using a flow control interception device
A system and method for extending the reach of a data communication channel using flow control interception devices is described. The method decreases the latency-induced reduction in the data...
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7206146 |
Biphase magnetic pattern detector using multiple matched filters for hard disk drive
A hard disk drive (HDD) holds data using a biphase scheme. A plurality of matched filters are used to detect binary data represented by the biphase pattern without the need for synchronous sampling...
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7206335 |
Optimum interpolator method and apparatus for digital timing adjustment
A digital timing synchronizer of a receiver is provided for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect...
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7206362 |
Binary data transmission on a single information channel
In the invention, it becomes possible to extract all clock information data processing data by simultaneously comparing first, second and third voltage levels to each data bit in clocked time...
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7203254 |
Method and system for synchronizing in a frequency shift keying receiver
The invention provides a method and apparatus for achieving timing synchronization during signal acquisition and for achieving frequency synchronization in a digital communication receiver after...
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7203257 |
Best linear unbiased channel estimation for frequency selective multipath channels with long delay spreads
A channel impulse response for a channel is determined by determining an initial channel impulse response estimate based upon a stored training sequence and a received signal, by thresholding the...
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7200185 |
Star receiver burst processing
Architecture for processing a record of burst information in a transmission link. A waveform sampler samples a received waveform containing a record of symbols imposed on a carrier signal. Symbol...
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7200193 |
Quadrature vestigial sideband digital communications method and system with correlated noise removal
A quadrature vestigial-sideband (QVSB) method and system with correlated noise removal are embodied in a QVSB receiver with a correlated-noise estimator-subtractor configured to obtain I/Q channel...
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7197065 |
Region searcher and method of driving the same and code searcher using the same
A region searcher, a method of driving the same, and a code searcher using the same are disclosed. When a predetermined region is iteratively searched, the energy value corresponding to the same...
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7197092 |
Amplitude-offset invariant template detection for pulse position estimation; methods, systems and program products
A method and system of determining and correcting modulation and offset effects in a received signal. A signal [s(n)] is received subject to modulation effects A on pulse shape or peak [p(n)] and...
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7197280 |
Method and arrangement for fast frequency searching in broadband mobile radio receivers
In the method according to the invention for searching for the carrier frequency f of a mobile radio transmitter in a mobile radio receiver, two or more values e(k) of the spectral input power are...
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7194055 |
Frame synchronization device, communication terminal apparatus using this device and frame synchronization method
According to the present invention, there is disclosed a frame synchronization device which detects a time point to start a data frame from a received signal. Here, the received signal is...
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7190746 |
Multiple lobe dot product detector for M-code GPS receivers
A positioning system receiver is disclosed. The positioning system receiver includes an antenna for receiving radio frequency (RF) signals. The positioning system receiver also includes a radio...
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7187730 |
Method and apparatus for predicting CCK subsymbols
An apparatus and a method for symbol decoding of baseband data in a wireless communications network is disclosed, and specifically CCK subsymbol prediction and symbol demodulation that occurs at...
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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...
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7184496 |
Complementary code decoding by reduced sized circuits
A complementary code decoder technique is provided where the encoded input data is first parallelized. From the parallelized data, correlation values are generated by a correlator circuit that is...
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7180961 |
Receiving device
The receiving device of the invention contains a correlational operation unit that executes a correlational operation between a first modulated signal having a spread-spectrum modulation applied...
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7177376 |
Apparatus and associated method of symbol timing recovery using coarse and fine symbol time acquisition
A receiver determines a symbol synch time for recovering data from a symbol of signal samples generated in accordance with Orthogonal Frequency Division Multiplexing. Each symbol includes a guard...
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7177345 |
Demodulating device and method for W-CDMA base station
A demodulator of a W-CDMA base station comprises: a chip calculator for de-spreading signals received through sectors including antennas; a symbol calculator for using symbols of a control channel...
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7173986 |
Nonlinear overlap method for time scaling
A nonlinear overlap method for time scaling to synthesize an S 1 [n] and an S 2 [n] into an S 3 [n] is disclosed. The S 1 [n] and the S 2 [n] having N 1 and N 2 signals respectively. The...
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7170955 |
Method and apparatus for accurately detecting presence of a valid signal
A method and apparatus for accurately detecting the presence of a valid signal includes processing that begins by determining the energy level of an input signal in real time to produce a real time...
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7171161 |
System and method for classifying signals using timing templates, power templates and other techniques
A system and method for classifying signals occurring in a frequency band. One or more characteristics of one or more signals in the frequency band are detected using any suitable technology, such...
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7167683 |
Bad frame indicator for radio telephone receivers
A method for identifying a bad GSM speed frame and simultaneously maintaining a frame erasure rate below a specified value. The method is based upon a joint use of four signal quality metrics: (1)...
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7164722 |
Radio communications system, transmitter, receiver, radio transmission method, radio reception method and computer program therefor
A radio communications system in which a desired signal can be accurately discriminated from interfering signals, even when signals from a plurality of transmitters are received simultaneously, in...
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7164668 |
Base station multichannel CDMA subtractive interference canceller
Apparatus employed by a base station wherein a plurality of channels are received as a received signal. Each channel is associated with a code. For each of the plurality of channels, others of the...
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7164738 |
Signal canceling method and device
In a signal cancellation method and device which can cancel input signals quickly and reliably (stably), an input signal is split into a first and second signal. The second signal is split into...
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7161977 |
Receiver having a ratio-based signal acquisition method
A GPS receiver having a ratio-based signal acquisition method. The GPS receiver has a tentative signal acquisition when a first ratio of the largest GPS signal correlation value to the second...
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7162643 |
Method and system for providing transfer of analytic application data over a network
A method and system providing a high speed and secure data link for moving large amounts of data across a network, such as the data used in an analytic application. Featured are simultaneous...
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7154967 |
Methods and apparatus for efficient and accurate coarse timing synchronization in burst demodulators
Burst detection with high accuracy is achieved with a single autocorrelation circuit. Autocorrelation is performed using a preamble-embedded correlation sequence chosen such that a steeply sloped...
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7151809 |
Channel estimation and spatial processing for TDD MIMO systems
Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/receive chains at the access point and user...
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7151790 |
Automatic signal extraction and analysis from time-frequency representation
The problem of operationally analyzing spread spectrum frequency-hopping transmissions has been known since the invention of frequency-hopping radios. A frequency-hopping radio transmits a...
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7145955 |
Optimized synchronization preamble structure
Orthogonal Frequency Division Multiplexed transmission and reception using a broadcast burst preamble. The preamble comprises at least one first part (A-FIELD) designed for a coarse frame detection...
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7145893 |
Communication station having an improved antenna system
A communication station includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by...
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7145969 |
Method and apparatus for complementary code keying
An apparatus and a method for decoding data that has been Complementary Code Keying (CCK)-encoded at one of the set of first and second differing data rates. The method includes receiving a symbol,...
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7142587 |
Received path timing detecting circuit at DS-CDMA system
A received path timing detecting circuit in a receiver used in a DS-CDMA system, which can detect received path timing in multi path propagation channels even under surroundings in which noise and...
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7142584 |
Synchronizing a bash station and a mobile station
A method for synchronizing a base station to a mobile station includes transmitting a signal sequence K(i) of length n from the base station to the mobile station. The signal sequence K(i) is...
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7142586 |
Robust delay estimation architecture
In a robust delay estimator system and method, an average PDP buffer serves as a source of reliable control information to other stages of the delay estimator. The PDP output from every path...
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7139338 |
Receiver
A receiver is operable to detect and recover data from at least one set of received signal samples. The signal samples comprise a plurality of data bearing signal samples and a plurality of guard...
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7136436 |
Boundary detection using multiple correlations
Detecting a boundary between training sequences in a transmission is an important operation. In many communications systems, there are no special boundaries or markers to denote the end of one...
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7133647 |
Chiprate correction in digital transceivers
A transceiver for a code division multiple access communication system comprises a receiver to receive coded information signals and a transmitter to transmit coded information signals. A local...
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7133438 |
Acquisition method and apparatus for carrying out the method
Communications acquisition method for correlating an incoming binary-coded spread sequence having m bits and arriving at a frequency f with a locally generated spread sequence by phase-shifting a...
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7133424 |
Method and device for synchronizing a mobile radio receiver with a time slot structure of a received radio signal
In a method for synchronizing a mobile radio receiver with a radio signal time slot structure a first portion, detected during a first time slot period, and a second portion, detected during a...
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7133434 |
Making measurements on parallel frequencies in a radio communications device
A diversity receiver in a radio apparatus has at least two reception branches and a RAKE receiver to combine signal received by the different reception branches as well as a measuring receiver to...
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7133474 |
Method and system for timing recovery and delay spread estimation in a communication system
A timing recovery scheme demarcates a complete range of inter-symbol interference free (ISI-free) sampling positions available in a cyclically extended symbol. The timing recovery scheme computes...
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7130334 |
Method and apparatus for a pilot search using a matched filter
The present invention includes a cellular pilot signal detector or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter to detect a pilot signal...
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7130363 |
Apparatus for estimating phase information using matched filter in communication system and method thereof
An apparatus and method for estimating phase information, including a matched filter that outputs converted synchronization signals, based on received data, and converted information of the...
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7130326 |
Gated time division multiplexed spread spectrum correlator
A civil moderate (CM) code and a civil long (CL) code are time division multiplex (TDM) as a combined code having alternating code chips that spectrum spread a transmitted signal received by a...
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7113555 |
Data channel with joint data estimation and timing recovery
A data channel includes a data detector that approximates both inter-symbol-interference (ISI) and random timing perturbations using a single finite-state hidden Markov model. The ISI is...
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7106813 |
Method and apparatus for combined soft-decision based interference cancellation and decoding
A method of communications channel coding gain optimization using combined ISI cancellation and turbo decoding is provided. Log-likelihood ratio probabilities with extrinsic values are computed...
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7106814 |
Method and wireless device employing a preamble to initiate communications
A wireless receiver 300 and corresponding method to detect a message identifier or preamble that has been generated and provided by a transmitter 200 uses FFTs to estimate frequency and time...
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