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Class 375/147 - Receiver


Subclass of Class 375 - Pulse or digital communications
Definition: Subject matter comprising recovery, demodulation and decoding
No. of patents: 1410
Last issue date: 05/22/2012


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NumberTitleIssue Date
8184675Residual frequency offset exploitation
Respective residual frequency offsets of de-spread correlated signals derived from a received communication signal are determined and used to improve receiver performance in high-velocity situations. The knowledge of the residual frequency offsets of the respective ...
05/22/2012
8175135Equalizer with adaptive noise loading
A method for communication includes receiving signals at a receiver from one or more sources, including a target signal transmitted by a given transmitter. A channel response is estimated from the given transmitter to the receiver, and a filter response is computed ...
05/08/2012
8170082Cross-talk mitigation in global navigation satellite systems
Embodiments related to cross-talk mitigation are described and depicted. ...
05/01/2012
8170083Method and apparatus for reducing the processing rate of a chip-level equalization receiver
A method and apparatus for reducing the processing rate when performing chip-level equalization (CLE) in a code division multiple access (CDMA) receiver which includes an equalizer filter. Signals received by at least one antenna of the receiver are sampled at M tim...
05/01/2012
8155171Multipath signal judging method, program, and multipath signal judging device
A multipath signal judging method includes: performing correlation calculation for I and Q components for a reception signal as a positioning signal modulated in a spread code and a replica code; judging code phase based on the correlation calculation; calculating a...
04/10/2012
8155170Method and apparatus for achieving channel variability in spread spectrum communication systems
A method and apparatus are disclosed for modulating a communication signal in a code division multiple access (CDMA) environment using orthogonal N by N Hadamard spread spectrum codes Orthogonal spreading codes are used that have lengths that are not a power-of 2 to...
04/10/2012
8149896Spur suppression for a receiver in a wireless communication system
Techniques for suppressing spurs in a receiver are described. A processor (e.g., within a wireless device) receives digital samples for a desired signal having a spur located within the bandwidth of the desired signal. A spur is an undesired signal that may be gener...
04/03/2012
8144749Nonparametric MIMO G-Rake receiver
With a nonparametric G-Rake receiver, combining weights may be determined using a nonparametric mechanism in multiple-input, multiple-output (MIMO) scenarios. In an example embodiment, a method for a receiving device having a nonparametric G-Rake receiver entails ca...
03/27/2012
8144748Method and apparatus for equalizing CDMA signals
A minimum mean square error (MMSE) equalizer corresponding to a plurality of receive antennas is generated using channel information for a first plurality of users including a desired user, a ratio of interference power to signal power, channel information for a sec...
03/27/2012
8130817Non-data-aided channel estimators for multipath and multiple antenna wireless systems
Novel non-data-aided maximum likelihood estimators for the delays and the attenuations in an ultra-wide bandwidth channel are proposed. Numerical results show that these new estimators outperform the previous non-data-aided maximum likelihood channel estimators deri...
03/06/2012
8130816Receiver for receiving a spectrum dispersion signal
A receiver for the CDMA system which reduces power consumption during a suspension period of intermittent receiving operation by monitoring a suspension period by a low-power timer so that a VC-TCXO, reference signal group generation and receiving units are turned o...
03/06/2012
8111734Device and method for fast transition from preamble synchronization to data demodulation in direct sequence spread spectrum (DSSS) communications
A device for fast transition from preamble synchronization of a received baseband signal to demodulation of the received baseband signal may include a baseband chip tracking loop to generate an offset tracking value to track any initial chip phase offset and Doppler...
02/07/2012
8102898Channel estimating apparatus, CDMA receiving apparatus, and channel estimating method
A corrected channel estimating apparatus is disclosed, which is capable of removing side-lobe components mutually leaking into transmission paths from channel estimates to increase the accuracy. A channel estimation unit calculates channel estimates for a plurality ...
01/24/2012
8094701Channel estimation for high data rate transmission using multiple control channels
For high rate data transmission, channel estimates may be computed using multiple control channels. An exemplary method comprises determining a transmission parameter for a data channel, generating first and second channel estimates derived respectively from first a...
01/10/2012
8073039Reception apparatus using spread spectrum communication scheme
In a reception apparatus, a matched filter that has conventionally been arranged in a searcher unit is mounted on an acquisition unit together with a large scale memory. The large scale memory once stores reception chip signals, and thereafter outputs them to the ma...
12/06/2011
8073038Wireless communication apparatus and response signal spreading method
A wireless communication apparatus capable of minimizing the degradation of the separation characteristic of response signals to be code-multiplexed. In the apparatus, a control part (209) controls both a ZC sequence to be used for the primary spread in a spr...
12/06/2011
8068533Receiver for GPS-like signals
A module for receiving a plurality of signals that are modulated with a common carrier, where each of the signals includes information that enables a determination of a distance from said receiver to a source that transmits the signal, and outputs to outside the mod...
11/29/2011
8068534Authenticating a signal based on an unknown component thereof
Authentication of a signal, signalA, that is provided as having been received from a source at a first global location by comparing it to a signal that is received from the source at a second global location, signalB, where signalB c...
11/29/2011
8068532Scaling in a receiver for coded digital data symbols
Coded digital data symbols sent through a transmission channel of a communications network are received in a receiver. Estimates (y) represented by a first number (a+b) of bits are calculated, and modified estimates (y′) represented by a second number (c) of bits ...
11/29/2011
8064496Interference cancellation for wireless communication
Interference in a wireless communication is minimized, or at least reduced, by scaling the symbols received from an interfering transmitter. Input samples from the interfering transmitter are isolated and decovered to generate received symbols. The gains of the rece...
11/22/2011
8045599Selection of training sequences for multiple-in multiple-out transmissions
A cellular communication system comprises a Multiple-In Multiple-Out, MIMO, transmitter (101) and receiver (103). The MIMO transmitter (101) comprises a message generator (303) for generating MIMO messages comprising selected training seq...
10/25/2011
8014438Method and apparatus to compute a noise power estimate in a WCDMA network based on dedicated physical control channel (DPCCH) processing
A method to process DP bits within a WCDMA receiver where a noise estimation that may be implemented within hardware is provided for improved flexibility and performance. DPCH pilot symbols are received, quantized, channel compensated and combined. The computation o...
09/06/2011
7965761Multicarrier sub-layer for direct sequence channel and multiple-access coding
Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, a...
06/21/2011
7953139Interference cancellation in a spread spectrum communication system
A code division multiple access communication system transmits a pilot and traffic signal over a shared spectrum. The pilot and traffic signal have an associated code and are received over the shared spectrum. The received signals are sampled and the samples are del...
05/31/2011
7949035GPS signal acquisition system and method
A Global Position System signal acquiring system and method is provided in this invention. Pluralities of counters are set, each corresponding to a code bin and a frequency bin of the signal. Subsequently, the signal corresponding to the counters is repeatedly recei...
05/24/2011
7949036Determining a detection signal in a spread spectrum communications system
Disclosed is a method of generating a detection signal for detecting energy in a spread-spectrum signal, comprising: de-spreading the spread-spectrum signal by applying a predetermined spreading code to obtain a sequence of de-spread signal symbols (202A-2...
05/24/2011
7933313Signal quality measuring apparatus for WiBro system and the method thereof
Disclosed herein are a signal quality measuring apparatus for the WiBro system and a method thereof. The signal quality measuring apparatus for a WiBro system includes a WiBro signal reception unit, a preamble code correlation unit, a channel compensation/demodulati...
04/26/2011
7929591Method and apparatus for multiple scrambling code impairment compensation
In one or more embodiments, a receiver circuit generates impairment correlation estimates for a desired signal that are compensated for the use of different transmission scrambling codes in transmitting the desired signal and an associated pilot signal. In one embod...
04/19/2011
7924908Rake receiver interface
In some embodiments of the present invention, a method and apparatus to generate interrupts in a transfer of information between a rake receiver and a processor, said interrupts having a rate of generation per unit time independent of a rate of the transfer of infor...
04/12/2011
7912114Means for low probability of interception/detection underwater acoustic communications
A direct-sequence spread-spectrum communications method of de-spreading and decoding received data transmitted through an acoustic channel. A first code match filter is applied to receive data to output a first code impulse response comprising a channel impulse resp...
03/22/2011
7889780Method of estimating doppler spread and signal-to-noise ratio of a received signal
A method for estimating a Doppler spread and a signal-to-noise ratio of a received signal includes: (a) calculating one or more functions of a carrier component of the received signal at a first time point relative to a pilot signal embedded in the received signal; ...
02/15/2011
7885317AltBoc receiver
An AltBoc receiver accumulates power measurements over code chip ranges that are associated with time slots that span the code chips. The receiver combines a received signal with code and carrier phase offsets that correspond to the time slots to produce the power m...
02/08/2011
7876809Code division multiple access (CDMA) receiving device, and path searching method
Upon receiving an instruction to open a radio link, a path management unit designates, for one radio link, a spreading code number for a common pilot channel and a spreading code number for an individual channel to a spreading code generator. The spreading code gene...
01/25/2011
7873097Systems and methods for concatenation in spread spectrum systems
A receiver despreads a spread spectrum sequence by partially despreading the spread spectrum sequence using an outer spreading code, and then despreading the partially despread sequence using an inner spreading code. This can advantageously save processing power. In...
01/18/2011
7869485Method and apparatus for detecting lock status of a GPS signal
An apparatus for detecting lock status of a spread spectrum signal, having a first accumulator, a first calculation unit, a second calculation unit, a second accumulator, a multiplier and a comparator. The first accumulator accumulates an in-phase integration result...
01/11/2011
7852906Wireless communication device and channel estimation and separation method in multi input system
In a wireless communication apparatus of multi-input system, Fourier transform is used to estimate the frequency response of a received signal and further provide a converted impulse response of time domain, and a window function having a simple lowpass filter chara...
12/14/2010
7852905System and method for despreading in a spread spectrum matched filter
Implementation of an improved matched filter system for despreading a PN code from a spread spectrum signal utilizes a matched filter system that may be broadly conceptualized as a system that optimizes the number of multipliers and adders utilized by the system in ...
12/14/2010
7848388Minimizing estimation time for rake fingers with help of a speed sensor
An electronic equipment includes a RAKE receiver that includes at least one finger having a settable delay, a transducer operable to provide a signal indicative of motion of the electronic equipment, and a delay estimator circuit operative to calculate a duration be...
12/07/2010
7839916Systems and methods for communication in a global positioning system (GPS) device
An apparatus and methods for communicating between or among global positioning system (GPS) receivers enhanced with wideband transmitters, which can include ultra wideband (UWB) transmitters. In one embodiment, WB pulses are precorrected by a transmitter to align wi...
11/23/2010
7839917Receiver of a CDMA system with a path alignment circuit
A receiver of a CDMA system, receiving a signal transmitted through a multi-path channel, with a path alignment circuit is disclosed. The path alignment circuit has a pack-based memory device serially inputting samples of low over-sampling rate than that required by...
11/23/2010
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