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7627060 |
Receiver and method having envelope compensation signal
In some embodiments, methods and apparatus to reduce nonlinearity in a receiver are generally described herein. Other embodiments may be described and claimed.
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7627056 |
System and method for orthogonally multiplexed signal transmission and reception on a non-contiguous spectral basis
A wireless communication system implements Forward Error Correction (“FEC”) and Interpolated Tree Orthogonal Multiplexing (“ITOM”). ITOM is a compact spectral waveform variant that uses a...
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7627054 |
Device and method for improving the signal to noise ratio by means of complementary sequences
A device and method for improving the signal to noise ratio by means of complementary sequences, consisting of the use of M complementary sets of sequences, understanding complementary as the sums...
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7627043 |
Method and apparatus for transmitting data with reduced coupling noise
A first integrated circuit is coupled to a first connector. A second connector is coupled to the first connector through multiple conductors, in which alternating pairs of conductors are reversed....
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7627021 |
Interference canceling CDMA mobile station receiver
A receiver that provides interference cancellation in conjunction with RAKE processing. Signal parameters corresponding to each of a plurality of fingers corresponding to RAKE processing are...
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7624009 |
Method and system for producing variable length context models
Various embodiments of the present invention provide methods and systems for determining, representing, and using variable-length contexts in a variety of different computational applications. In...
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7623600 |
High speed receive equalizer architecture
Equalization is provided in a high speed communication receiver that includes in various aspects an automatic gain control input stage, a decision feedback equalizer, a clock and data recovery...
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7623591 |
Diversity receiver
A diversity receiver includes N number of Fourier transform circuits, N number of channel estimators, N number of match filters, N number of soft demappers, a combination/selection unit, and a...
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7623579 |
Method of demodulating OFDM type signals in the presence of strong co-channel interference signals
A method of demodulating a signal in a transmission system where the modulation includes several substantially orthogonal subcarriers, and the vector of the propagation channel H[n,k] is known or...
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7623569 |
Apparatus and method for estimating interference and noise in a communication system
A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone...
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7620372 |
Communication device, method for controlling communication, game machine, and game system
A technology for realizing real-time frequency hopping in an environment containing a plurality of masters. A game machine includes a plurality of communication modules which carry out the...
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7620124 |
Direct conversion receiver and receiving method
A receiving method and a direct conversion receiver are provided. The receiver comprises a mixer ( 308 ) for mixing a received signal into a base band signal comprising I and Q branches, and an A/D...
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7619964 |
High doppler channel estimation for OFD multiple antenna systems
Fast fading in cellular systems causes time variation of the Channel Impulse Response (CIR) resulting in significant performance degradation that is reduced by adding a pulse train to the...
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RE40986 |
Channel simulator for mobile systems
A device and a method at a mobile communication system which provide a flexible and realistic way of emulating the time dispersive qualities and the broadband frequency correlation qualities of a...
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7616719 |
Compensation for residual frequency offset, phase noise and sampling phase offset in wireless networks
Improved performance, particularly gain in signal-to-noise ratio (SNR), in high-bandwidth Orthogonal Frequency Division Multiplexing (OFDM) receivers, software and systems is achieved by...
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7616606 |
Mechanism for avoiding triggering silent radio squelch circuits
A ‘smart’ sub-channel hopping control mechanism executes one or more sub-channel selection discriminators to enable the communications controller of a spectral reuse transceiver to delineate on...
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7613438 |
Method for reducing the effect of impulse noise in a motor vehicle radio
Methods are provided for reducing impulse noise effects in a motor vehicle radio. One method includes the steps of first detecting impulse noise received by the motor vehicle radio. The received...
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7613258 |
Apparatus and method for determining GPS tracking loop parameter based on SNR estimation
A method for estimating signal quality of a spread spectrum signal is provided. The method includes squaring a plurality of in-phase correlation results and a plurality of quadrature correlation...
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7613250 |
Distortion compensation apparatus
Provided is a distortion compensation apparatus which can correspond to the number of carriers adaptively. The apparatus includes a distortion compensation processing circuit multiplying an input...
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7613248 |
Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems
Techniques for processing a data transmission at a transmitter and receiver, which use channel eigen-decomposition, channel inversion, and (optionally) “water-pouring”. At the transmitter, (1)...
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7613228 |
M-Algorithm multiuser detector with correlation based pruning
A multiuser detector system with correlation based pruning including a parameter estimation module adapted to receive complex signals, and to produce estimated signature waveforms for each of K...
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7609791 |
Iterative decoding with intentional SNR/SIR reduction
The excess signal-to-interference ratio (SIR) or the like of a communication channel is determined by repeatedly decoding received information with successively reduced effective SIR. The step size...
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7609790 |
Joint signal demodulation in a low and high data rate channel environment
A receiver is capable of demodulating both high data rate and low data rate transmissions. An antenna receives the high and low data rate transmissions, as a received signal. An interference...
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7609789 |
Phase noise compensation for MIMO WLAN systems
The present invention provides a method for reducing phase noise in OFDM systems by analyzing a time-dependent representation of the phase noise that changes in real time according to received...
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7609785 |
Mitigation of interference in cell search by wireless transmit and receive units
A wireless transmit receive unit (WTRU) provides facilitation of cell search. In one embodiment, received samples are split into a plurality of sample sets for processing. Each of the sets is...
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7609759 |
Method and system of nonlinear signal processing
A nonlinear equalizer for treating the nonlinear component of a distorted digital signal includes a first processing unit adapted to receive the distorted digital signal and yield an appropriate...
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7607052 |
Physical coding sublayer for a multi-pair gigabit transceiver
A physical coding sublayer (PCS) transmitter circuit generates a plurality of encoded symbols according to a transmission standard. A symbol skewer skews the plurality of encoded symbols within a...
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7606546 |
Variable frequency clock generator for synchronizing data rates between clock domains in radio frequency wireless communication systems
A system, method and system are disclosed for using a variable frequency clock generator to synchronize an average data rate over intervals of time in a variable clock domain to make it equal to a...
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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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7606318 |
Method of space-time encoding and decoding for frequency selective fading channel
The invention discloses a space-time encoding and decoding method for a frequency selective fading channel, comprising: an encoder takes two independent data fields of a time slot in input data as...
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7606299 |
Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system
In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics....
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7606293 |
Bidirectional turbo ISI canceller-based DSSS receiver for high-speed wireless LAN
A bidirectional turbo ISI canceller cancels precursor-ISI as well as postcursor-ISI in a received signal without incorporating a multiplicative feedforward equalization filter. This is accomplished...
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7605838 |
Broadcast signal receiving apparatus and method of filtering noise signals
Broadcast signal-receiving apparatus and a method filtering noise signals. The broadcast signal-receiving apparatus includes a tuner to convert an RF signal to a lower frequency signal to output an...
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7602867 |
System and method for linear distortion estimation by way of equalizer coefficients
Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients...
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7602866 |
Signal receiver devices and methods
A method/apparatus is provided that detects impairment in a received signal and employs the structure in the receiver that is designed for that purpose. Preferably, the method/apparatus detects the...
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7602838 |
Linear turbo equalization using despread values
A linear turbo-equalizer for use in a CDMA receiver equalizes a despread received signal (rather than the spread received signal) to suppress self-interference resulting from coupling between...
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7599674 |
Overload protection for receiver front end
An embodiment is a receiver for a communications system that may substantially block unwanted signals in a frequency range to protect the receiver from overload. Simultaneously, the receiver of an...
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7599666 |
Communication system and method using transmit diversity
Influencing the transmission of signals from a transmitting device to a receiving device in a communication system comprising at least one transmitting device and at least one receiving device is...
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7599423 |
Successive interference canceling for CDMA
Successive interference canceling for CDMA. ICI may result from a signal's multi-path effects, or by filtering/suppression of some of the component energy of the signaling waveforms. Energy...
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7599344 |
Method and apparatus for reducing multi-user processing in wireless communication systems
A method and apparatus is disclosed for reducing multi-user processing at the receiver in wireless communication systems. Detected codes are grouped according to channel impulse response and a...
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7596363 |
Method and system for measuring receiver mixer IQ mismatch
Aspects for measuring receiver mixer IQ mismatch in a transceiver are described. The measuring includes providing a training signal for a receiver mixer, the training signal having periodic,...
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7596194 |
System and method for automatic roaming in land mobile radio systems
A system and method for automatic roaming in land mobile radio (LMR) systems are provided. The method includes determining a signal quality value for each of a plurality of communication channels...
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7596192 |
Automatic gain control method for radio communication mobile station
A signal transmitted from a base station is received by a receiver. The received signal is supplied to an AGC amplifier and is then supplied to a demodulator, so that the signal is demodulated into...
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7596190 |
System, method, and apparatus for correction of code doppler shift
A method of signal reception according to one embodiment of the invention includes compensating for an estimated or measured Doppler shift during integration of a correlated signal. Such a method...
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7593492 |
Combinational hybrid turbo-MUD
A high quality real-time Turbo-Mud processing system that chooses between a high complexity multi-user detectors that results in better estimates of the bit streams and computationally low...
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7593486 |
Apparatus and method for controlling transmission mode in a MIMO mobile communication system
An apparatus and method for controlling a transmission mode in a MIMO mobile communication system are provided. In a receiver in the MIMO mobile communication system, an error checker checks errors...
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7593475 |
Space-time and/or space-frequency block coding using complex signal swapping
A method of space-time and/or space-frequency block encoding begins by receiving at least two complex signals, wherein each of the at least two complex signals includes a real component and an...
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7593461 |
Multi-user detection using equalization and successive interference cancellation
A plurality of signals are received in a shared spectrum. Samples of the received user signals are produced as a received vector. The received vector is segmented into a plurality of segments. For...
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7593458 |
FEXT determination system
Operational data is utilized to determine the FEXT interference induced by one line into the other DSL line. FEXT interference can be calculated using the NEXT interference measured between the two...
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7592936 |
Input distribution determination for denoising
A denoising process or system uses convex optimization to determine characteristics of a clean signal. In one embodiment, a noisy signal that represents a set of symbols can be scanned to determine...
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