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9031123 Communication system and method using subspace interference cancellation  
A receiver performs interference mitigation under blind or semi-blind conditions using diversity present in the signal of interest or in the interferer. A first path interference mitigation...
9031124 Scheme for generating hypothesis and estimating a carrier frequency offset in a receiver  
A method of generating a hypothesis and estimating a CFO includes receiving a signal including a set of radio frames, dividing each received radio frame of the set into a set of received...
9020021 Precoding loss reduction  
An apparatus for encoding data signals includes a transmitter configured to encode and transmit a data signal over a communication channel, the transmitter including a precoder; a signal shaper...
9020023 Reception device and reception method  
The present technique relates to a reception device and a reception method which can improve equalization performance. An equalization processing unit has a time domain equalization unit which...
9014318 Self-calibrating continuous-time equalization  
Embodiments of the invention comprise a continuous-time equalizer for reducing ISI in data received from a communication channel, and methods and circuitry for tuning or calibrating that...
9014249 Communications receiver with channel identification using A-priori generated gain vectors and associated methods  
A communications receiver includes an antenna, and a burst signal acquisition circuit coupled to the antenna to detect a burst signal received over a wireless communications channel. The burst...
9009761 Wireless transport framework with variable frequency domain training  
A system and method for wirelessly transmitting audiovisual information. Training information may be stored in a memory. A plurality of packets may be generated, including the training...
8995510 Apparatus and method for analyzing a signal under test  
A portion of a signal under test corresponding to a portion of interest in an eye pattern is easily identified. An eye pattern display area displays an eye pattern that is derived from sample data...
8995512 Adaptive off-channel detector for receivers  
Receivers (500) and methods of adaptively adjusting the receivers based on a received interferer are described. The peak-to-average ratio of a received signal is used to determine the type of...
8989253 Reconditioning equalizer filter for non-constant envelope signals  
A technique for a reconditioning equalizer filter for non-constant envelope signals is described. The input to a transmitter chain is modified by a reconditioning equalizer filter, prior to being...
8989245 Mirror signal IQ-imbalance correction  
A system and method are provided for calibrating the IQ-imbalance in a low-IF receiver. A Test Signal can be generated in a mirror frequency and conveyed to the receiver. The power of the signal...
8971210 Reconfigurable multi-stream processor for multiple-input multiple-output (MIMO) wireless networks  
A configurable network adapter has N analog front ends, each generating a receiver output and a transmitter input. In a first mode of operation, the analog front end receiver outputs are coupled...
8958471 Method, apparatus, and system for sliding matrix scoreboard utilized in auto feedback closed loops  
Requests are identified for equalization coefficients and a plurality of coefficient selections are tracked relating to the requests. A matrix is maintained within a grid space that is to...
8938037 High speed gain and phase recovery in presence of phase noise  
A circuit for reducing phase errors in a digital communication systems signal is provided. The circuit comprises a demodulator block, a feed-forward path, a feed-back path, and a slicer. The...
8934526 Improvements relating to equalizers  
Methods and apparatus adapting equalizers for compensating for signal distortion of a received digital signal are disclosed. The method comprises deriving equalizer settings for a received signal,...
8929428 Feed-forward equalization in a receiver  
Embodiments are directed to feed-forward equalization. In some embodiments, a first circuit is configured to receive a signal transmitted over a channel as a differential pair, and a second...
8923454 Method, apparatus and system for eliminating aliasing noise in multi-carrier modulation system  
A method, an apparatus and a system for eliminating aliasing noise in a multi-carrier modulation system are disclosed. The method includes: acquiring a first power spectrum density template;...
8923416 Symbol-level repetition coding in power line communications  
Systems and methods for implementing symbol-level repetition coding in power line communications (PLC) are described. In some embodiments, these systems and methods may provide reliable...
8923433 Digital transmitter  
An equalizer provided in a digital transmitter compensates for attenuation in a signal channel to a digital receiver. The equalizer generates signal levels as a logical function of bit history to...
8917803 Circuits and methods for characterizing a receiver of a communication signal  
Circuits and methods characterize a receiver. The circuit includes a decision feedback equalizer (DFE) circuit, a clock and data recovery (CDR) circuit, a data checker, and an eye-scan controller....
8917800 DC balance offset adjustable circuit and semiconductor device including the same  
A mechanism is provided for dynamically adjusting DC offset at the time of deviation from DC balance ½ (DC level) in a data pattern including long-period consecutive bits generating DC offset in a...
8902964 Equalization effort-balancing of transmit finite impulse response and receive linear equalizer or receive decision feedback equalizer structures in high-speed serial interconnects  
Methods and apparatus for provision of equalization effort-balancing of transmit (TX) Finite Impulse Response (FIR) and receive (RX) Linear Equalizer (LE) or RX Decision Feedback Equalizer (DFE)...
8891710 Frequency-domain filtering for channel estimation in communications systems  
A method of channel estimation includes receiving a signal after transmission over a media having a plurality of sub-carriers in a frequency band. The signal is preprocessed including performing a...
8879615 Equalization adaptation using timing detector  
An equalization adaptation circuit comprises an equalizer, a transition determination circuit, a phase error circuit, a sequence recovery circuit, a phase error accumulator circuit, a transition...
8873608 Measurement of IQ imbalance in a vector modulator  
Described are methods of determining imbalance in an IQ modulator. Example methods include applying a set of at least three test signals to the I channel and Q channel to generate an output, then...
8867599 Equalization of transmissions  
Transmissions from mid-bus test equipment to a first device and from a second device to the mid-bus test equipment are equalized. Equalization instructions are passed from the first device through...
8867413 Method of pre-equalization by time reversal in FDD  
A method of pre-equalizing a data signal transmitted in frequency division duplex includes receiving via an originating reference antenna a first pilot sequence transmitted by a destination...
8867673 Selective quantization of decision metrics in wireless communication  
A method for quantizing decision metrics (e.g., log likelihood ratios (LLRs)) for reduction of memory requirements in wireless communication is described. The method includes selecting a...
8861580 Method and apparatus for determining one or more channel compensation parameters based on data eye monitoring  
Methods and apparatus are provided for determining one or more channel compensation parameters based on data eye monitoring. According to one aspect of the invention, a method is provided for...
8861575 Method and apparatus for equalizing signals  
A system and apparatus are disclosed for a method and apparatus for equalizing signals. An apparatus that incorporates teachings of the present disclosure may include, for example, an equalizer...
8855186 Methods and systems for providing optimum decision feedback equalization of high-speed serial data links  
Computationally efficient methods and related systems, for use in a test and measurement instrument, such as an oscilloscope, optimize the performance of DFEs used in a high-speed serial data link...
8855180 Receiver with enhanced DC compensation  
The disclosure relates to a receiver system that employs multiple instances of a DC compensation system to reduce DC offsets in a receiver path. The receiver has a receiver front end configured to...
8855184 System and method for non-interleaved signal field  
Efficient decoding in IEEE 802.11ah networks can be achieved by transmitting the signal (SIG) preamble field without interleaving bits within the SIG field. This may allow channel equalization and...
8842722 Decision feedback equalizers with high-order continuous time feedback  
Equalization techniques are provided for high-speed data communications and, more specifically, DFE (decision feedback equalizer) circuits and methods are provided which implement a high-order...
RE45136 Telephone status notification system  
A telephone line status notification system including at least one telephone line having a status, a communications network, at least one communications terminal which is connectable to the...
8817860 Systems and methods for performing phase tracking within an ADC-based tuner  
Systems and methods for performing phase tracking scheme for an Analog to Digital converter based tuner. In many embodiments, a phase tracking scheme is used that includes a phase locked loop that...
8797837 System and method for in-phase/quadrature multiplexing  
Systems and methods for multiplexing signals are disclosed. In one embodiment, the method comprises receiving a first signal having at least a real component, receiving a second signal having at...
8792396 Method of pre-equalizing a data signal by time reversal in FDD  
Pre-equalizing a data signal transmitted in frequency division duplex by an originating entity having a set of originating antennas to a destination entity having a set of destination antennas,...
8787436 Method and apparatus for reducing power consumption of communication device  
A communication device is disclosed including: an analog-to-digital converter (ADC) for converting an analog input signal into a digital input signal; an equalizer module coupled with the ADC for...
8787438 Reconditioning equalizer filter for non-constant envelope signals  
A technique for a reconditioning equalizer filter for non-constant envelope signals is described. The input to a transmitter chain is modified by a reconditioning equalizer filter, prior to being...
8781043 Successive equalization and cancellation and successive mini multi-user detection for wireless communication  
Techniques for recovering a desired transmission in the presence of interfering transmissions are described. For successive equalization and cancellation (SEC), equalization is performed on a...
8767812 Systems and methods for frequency domain realization of non-integer fractionally spaced time domain equalization  
Various systems and methods are described for performing fractionally spaced time domain equalization (TEQ). One embodiment is a method implemented in a communication system for training a...
8755428 Feed-forward equalizer architectures  
Circuits and methods are provided for efficient feed-forward equalization when sample-and-hold circuitry is employed to generate n time-delayed versions of an input data signal to be equalized. To...
8755264 Systems and methods for high rate OFDM communications  
Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the...
8750363 Methods and apparatus for weighted equalization  
Systems and techniques for equalization of a response of a receiver. In one embodiment, a response of a device to a known signal is measured to generate a measured signal. A processor is operated...
8743946 Frequency-domain equalization and combining for single carrier transmission  
A communication receiver including a time domain receive filter to provide a filtered output, the filtered output including colored noise. The receiver also includes a frequency domain,...
8737459 Transmitter equalizer optimization  
A transmitter includes an equalizer for conditioning a data signal in response to a first and a second equalizer setting. The first and second equalizer settings are both associated with a...
8724690 Multipath delay calculator for a decision feedback equalizer  
The present invention is directed to a decision feedback equalizer that implements a multipath delay calculator to determine the delay between a line-of-sight component of a received data signal...
8724686 Equalization by the pulse shape inverse of the input to the FRI processing in pulse based communications  
Certain aspects of the present disclosure relate to a method for equalizing a pulse signal corrupted by a noise and by various channel effects for obtaining a signal based on the periodic-sinc...
8718210 Channel impulse response estimation for wireless receiver  
Estimating a channel impulse response (CIR) for a wireless transmission, for example a multimedia broadcast multicast services single frequency network (MBSFN) transmission, may be performed by a...