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7627287 |
On-channel repeater
An on-channel repeater has a receiving antenna for receiving an RF signal and a transmitting antenna for transmitting on the same frequency as the input signal. An amplification path between the...
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7627064 |
System and method for enhanced symbol generation
According to some embodiments, an input symbol may be received, and a hard symbol may be generated from the input symbol. A probability associated with the hard symbol may be calculated along with...
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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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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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7623837 |
Receiver for an integrated heterodyne communication system including BAW-type resonators
A heterodyne receiving circuit for a digital communication system including a first band pass filter receiving a signal from an antenna, an amplifying circuit and a second narrow band pass filter...
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7623605 |
Interference canceling matched filter (ICMF) and related methods
An interference cancelling matched filter (ICMF) may include an antenna array for receiving a signal burst including a training sequence therein, and an adaptive space-time filter connected to the...
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7623604 |
Suppressing interference for wireless reception and improvements relating to processing a frequency shift keyed signal
A communications receiver may include an adaptive filter unit for removing coherent interference components from a received signal. In the absence of a signal of interest, the filter may adapt...
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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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7623595 |
Digital technique of compensating mismatches between in phase and quadrature channels
Methods and systems for filtering an input signal include receiving a first demodulated signal produced by multiplying a first generated signal with a received input signal, receiving a second...
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7623578 |
Time domain equalization using frequency domain operations
An equalizer for a multi carrier transmission system, converts a transmitted multi carrier signal into sampled frequency domain signals, and suppresses time domain delay dispersion, on the sampled...
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7623571 |
Wideband multiple access telecommunication method and apparatus
A method and system for retrieving a desired user data symbol sequence from a received signal are disclosed. In one embodiment, the method includes i) receiving a channel modified version of a...
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7620132 |
Positioning signal reception device and control method of positioning signal reception device
A positioning signal reception device receives a positioning signal transmitted from a position information satellite, and includes: a signal reception portion that obtains a reception signal by...
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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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7616720 |
Multirate digital transceiver
A multirate digital transceiver in which, on reception, signals are simultaneously decimated and coarsely down converted in an iterative process to narrow down a received wideband to a desired...
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7616711 |
Frequency domain filtering to improve channel estimation in multicarrier systems
A channel estimation system comprises a filtering component that selectively scales a plurality of carriers as a function of location of the plurality of carriers within a frequency band, wherein...
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7616699 |
Method of soft bit metric calculation with direct matrix inversion MIMO detection
A telecommunication MIMO receiver implements soft bit metric calculation with direct matrix inversion MIMO detection. The receiver has a detector that detects data symbols in a received signal 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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7613260 |
Modem control using cross-polarization interference estimation
A receiver includes an input circuit, which is coupled to at least one antenna so as to receive, process and digitize first and second signals, thus generating first and second streams of input...
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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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7606339 |
Information handling system including adaptive interference suppression feature and method of operation
An information handling system includes a wireless device and interference suppression apparatus that adapts to the different interference problems experienced by the wireless device when the...
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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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7606137 |
Cancellation systems for multicarrier transceiver arrays
Frequency-dependent cancellation separates a plurality of interfering signals received by a plurality of receivers. Received wideband single-carrier signals or multicarrier signals are separated...
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7602853 |
Method and apparatus for channel estimation
The invention relates to DVB-T system, and in particular, to a channel estimation method for OFDM symbols. A plurality of symbols are received to generate a pilot response. A finite impulse...
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7602844 |
On-line step-size calculation using signal power estimation and tone grouping of the frequency-domain equalizer for DMT-based transceiver
An efficient method for calculating the step-sizes for a frequency-domain equalizer of a discrete-multitone communications system using signal power estimation and tone grouping (SPE-TG) while...
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7602835 |
Multi-rate spread spectrum composite code
A correlator despreads a P/N long code constructed from two or more constituent codes A, B, C having N, M and L elements respectively. In a third stage, L filter taps decorrelate elements of the...
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7599433 |
Apparatus for and method of controlling a feedforward filter of an equalizer
A method of controlling a feedforward filter of an equalizer includes the steps of generating a complex representation of an output of the feedforward filter and generating a representation of a...
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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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7596195 |
Bandpass filter with reversible IQ polarity to enable a high side or low side injection receiver architecture
The invention enables a reversing IQ polarity in a bandpass filter so that the bandpass filter can filter signals with high side or low side injection.
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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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7596183 |
Joint optimization of transmitter and receiver pulse-shaping filters
A method for jointly designing a transmitter pulse-shaping filter and a receiver pulse-shaping filter having respective filter coefficients includes defining one or more performance-related...
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7593494 |
System and method for canceling impulse noise
A system for canceling impulse noise comprises an adaptive impulse canceler and a combiner. The adaptive impulse canceler is configured to receive a common mode component of a received signal and...
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7593493 |
Method and system for pre-equalization in a single weight (SW) single channel (SC) multiple-input multiple-output (MIMO) system
In wireless systems, a method and system for pre-equalization in a single weight (SW) single channel (SC) multiple-input multiple-output (MIMO) system are provided. A first receive antenna and at...
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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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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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7590206 |
Equalization apparatus and equalization method
An equalization apparatus and method estimate a channel response based on a received signal and a reference signal. Equalization processing estimates intersymbol interference with the received...
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7590205 |
Receiver with sliding intermediate frequency (IF) architecture and programmable bandwidth and method
Embodiments of a multi-mode receiver, transmitter, and method are generally described herein. Other embodiments may be described and claimed. In some embodiments, a sliding IF architecture that...
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7590204 |
Technique for adaptive equalization in band-limited high data rate communication over fading dispersive channels
In high data rate communication applications where digital data information is error-corrected coded and interleaved and transmitted with spectral limitations over fading dispersive channels, a...
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7590172 |
Low bias estimation of small signal-to-noise ratio
A user equipment includes an estimator. The estimator is configured to select a first estimate of a signal-to-noise (SNR) ratio, calculate a first amplitude and first noise variance, calculate a...
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7587010 |
Complex filter circuit and receiver circuit
A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having...
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7587009 |
Synchronization and estimation of a transmission channel
A method of estimating a transmission channel ( 302 ) comprises receiving a signal burst, which includes a sequence of training symbols; and determining ( 305 ) a desired synchronization position...
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7586996 |
Method for controlling the power of the output signal from an amplifier system and the associated system
Filtered digital information representative of the power of an output signal from an amplifier is generated, and control information from a setpoint representative of a desired power for the output...
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7586992 |
Apparatus and method for channel estimation and cyclic prefix reconstruction in an OFDM-STBC mobile communication system
An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second...
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7586983 |
Systems and methods for offset cancellation in integrated transceivers
In high speed receiver circuitry (e.g., on a programmable logic device (PLD) or the like), decision feedback equalization (DFE) circuitry is used to at least partly cancel unwanted offset (e.g.,...
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7583756 |
Adaptive pilot filter for a wireless communication system
Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different...
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7583737 |
OFDM signal receiver device and OFDM signal receiving method
The present invention relates to a OFDM signal receiver device that performs weighting for branch metrics based on average noise power or signal-to-noise power ratio and conducts Viterbi decoding...
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7583724 |
Low-power mixed-mode echo/crosstalk cancellation in wireline communications
A signal processing system includes an AGC and pre-echo cancellation system for receiving an analog signal, amplifying signal magnitude (over all frequencies) to a pre-determined level by AGC, and...
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7583723 |
Method and apparatus providing an advanced MIMO receiver that includes a signal-plus-residual interference (SPRI) detector
A method is disclosed to obtain M final symbol decisions for signals received through N receive antennas that were transmitted in M parallel data layers, using a same spreading code from M transmit...
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7583722 |
Scaling using gain factors for use in data detection
Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector....
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7580466 |
Demodulation device and demodulation method
The present invention relates to a demodulation device and a demodulation method, and its object is to demodulate subcarrier components utilizing estimated delay profiles to control the timing for...
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7580455 |
Decision feedback equalization with fractionally-spaced feedback data
A decision feedback equalizer (DFE) architecture uses feedback samples that are over-sampled with respect to the symbol rate. On-baud feedback samples are quantized with a slicer, while off-baud...
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