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RE44219 |
Adaptive receiving system and method for MIMO
Disclosed is an adaptive receiving MIMO (multi input and multi output) system and method which decides a symbol detecting order so as to estimate the symbol having the minimum summation of weights...
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8443034 |
Input vector selection for reducing current leakage in integrated circuits
Techniques are generally described for selecting input vectors that reduce or minimize leakage current for a plurality of integrated circuits (ICs) with the same design, but that differ due to...
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8428115 |
Adaptive equalization system and method
An adaptive equalization system includes an equalizer, a common-mode extraction buffer unit, a low-pass filter unit, a first and second energy compare units, a current comparator, and a digital...
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8417752 |
Offset cancellation in equalizer circuitry
An equalizer circuitry that includes an equalizer stage having a programmable current source is described. In one implementation, the programmable current source cancels voltage offset. Also, in...
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8417754 |
Identification of integrated circuits
Techniques are generally described for generating an identification number for an integrated circuit (IC). In some examples, methods for generating an identification of an IC may comprise selecting...
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8392493 |
Noise canceling device, weighing device, method of canceling a noise, and method of designing a digital filter
It is an object of the present invention to provide techniques which allow for easier change in filter characteristics of a digital filter. Then, in order to attain this object, in a weighing...
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8380774 |
Coefficient memory for least mean square finite impulse response filter
A read channel of a magnetic recording apparatus includes a filter that uses filter coefficients to process the data detected by a read head from the magnetic recordable media. The coefficients...
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8355430 |
Adaptive demodulation of a data communication
An embodiment of the invention pertains to demodulating a data communication into a sequence of symbols. In this embodiment, a first filter generates a first convolution between a first plurality...
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8341202 |
Code division multiple access (CDMA) system for calculating coefficients of filter and method for filtering a received signal
A method for calculating coefficients of a filter and a method for filtering are provided. The invention directly factorizes a specific function in a cepstrum domain by spectral factorization and...
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8335440 |
Method, system, and apparatus for blind equalization of BPSK signals
A system, method, and apparatus is disclosed for enabling a constant modulus algorithm (CMA) to be reliably used for blind equalization training of an equalizer. According to one embodiment,...
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8320439 |
Methods and apparatus for adaptive link partner transmitter equalization
Methods and apparatus are provided for adaptive link partner transmitter equalization. According to one aspect of the invention, a local transceiver adapts one or more equalization parameters of a...
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8300684 |
Real-time eye monitor for statistical filter parameter calibration
In described embodiments, filter parameters for a filter applied to a signal in, for example, a Serializer/De-serializer (SerDes) receiver and/or transmitter are generated based on real-time...
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8295340 |
Minimum mean square error equaliser with reduced complexity
The present invention relates to the field of communication devices, e.g. wireless communication devices. More particularly, the present invention relates to the field of signal equalization,...
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8284828 |
Monitoring instability and resetting an equalizer
Instability resulting from non-linear impairments is detected and an equalizer of an end device is reset. An equalization instability threshold is retrieved from a data storage device. An...
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8275026 |
Equalizer with controllably weighted parallel high pass and low pass filters and receiver including such an equalizer
An adjustable equalizer that includes a first branch including a low pass filter (LPF) and having a variable gain (β), and a second branch including a high pass filter (HPF) and having another ...
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8275028 |
Advanced television systems committee (ATSC) digital television (DTV) receiver
A computer system may comprise a receiver to perform equalization. The receiver comprises an equalizer. The equalizer may determine locations of a principal tap, a platform noise tap, and a...
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8259854 |
Channel estimation using common and dedicated pilots
The present invention relates to a receiver apparatus and method of channel estimation in a telecommunication system which provides at least two pilot sequences, and to a computer program product....
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8233523 |
Multidimensional asymmetric bang-bang control
In one embodiment, a system includes one or more digital feedback equalizers (DFEs) that include one or more residual intersymbol interference (ISI) detectors, one or more column balancers, and one...
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8223904 |
Multiple hypothesis decoding
A multiple-input receiver for processing one or more communication signals is disclosed. The receiver includes a first and second demodulators, a decoder and decision logic. The first and second...
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8213494 |
Sign-based general zero-forcing adaptive equalizer control
In one embodiment, a system includes one or more digital feedback equalizers (DFEs) that include one or more residual intersymbol interference (ISI) detectors, one or more column balancers, and one...
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8208529 |
Equalization apparatus and method of compensating distorted signal and data receiving apparatus
Provided are an equalization apparatus and method of compensating a distorted received signal. The equalization apparatus includes: a filter unit removing inter-symbol interference (ISI) from a...
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8204103 |
Scalable equalizer for multiple-in-multiple-out (MIMO) wireless transmission
Systems and techniques relating to processing information received from a spatially diverse transmission. In some implementations, an apparatus includes an input configured to receive data that has...
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8175201 |
Systems and methods for adaptive equalization in recording channels
Various embodiments of the present invention provide systems and methods for performing adaptive equalization. For example, various embodiments of the present invention provide methods for adaptive...
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8144759 |
Adaptive methods employing optimal convergence factors for processing complex signals and systems
Complex adaptive methods for complex information processing employ optimal individual convergence factors for real and imaginary components of the weight vector. For wireless receivers operating on...
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8131791 |
Decision feedback equalizer having parallel processing architecture
An integrated circuit includes a decision feedback equalizer (DFE) including a first and second digital equalizer logic including circuitry to compensate first and second bits in a received stream...
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8126045 |
System and method for latency reduction in speculative decision feedback equalizers
A decision feedback equalizer (DFE) and method include summer circuits configured to add a dynamic feedback tap to a received input to provide a sum and to add a speculative static tap to the sum....
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8121232 |
Transmitting/receiving system and method of processing broadcast signal in transmitting/receiving system
A receiving system and a method of processing broadcast signal are disclosed herein. The receiving system includes a signal receiving unit, a detector, and a channel equalizer. The signal receiving...
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8117249 |
Equalizer systems and methods utilizing analog delay elements
Systems and methods provide analog delay elements, which may be utilized in isolation or in a cascade, such as for use within equalizers or other types of applications. For example, a delay element...
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8098724 |
Automatic calibration in high-speed serial interface receiver circuitry
Circuitry for receiving a serial data signal (e.g., a high-speed serial data signal) includes adjustable equalizer circuitry for producing an equalized version of the serial data signal. The...
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8094707 |
List-based detection in fading channels with long intersymbol interference
An apparatus, computer software, and method for data detection in channels suffering from intersymbol interference comprising receiving a signal representative of a binary digit of data, computing...
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8085835 |
System and method for performing ranging in a cable modem system
The present invention provides a system and method for performing ranging operations in a able modern system. In accordance with embodiments of the present invention, transmission times,...
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8081675 |
De-emphasizing cable equalizer
In accordance with the teachings described herein, an extended equalizer circuit is provided for equalizing a digital communication signal transmitted over a transmission medium that causes a...
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8077642 |
Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems
A method includes transmitting a first signal over a network from a first communication link to a second communication link. The method further includes receiving a second signal with the first...
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8064556 |
Fractionally-spaced equalizers for spread spectrum wireless communication
This disclosure describes equalization techniques for spread spectrum wireless communication. The techniques may involve estimating a channel impulse response, estimating channel variance, and...
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8031765 |
Feedforward equalizer for DFE based detector
A system includes a first filter that receives an input signal and comprises N taps to filter postcursor inter-symbol interference (ISI) of the input signal. S taps of the N taps have a coefficient...
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8018986 |
Signal receiving apparatus including equalizer, terminal apparatus, signal receiving method, and signal receiving program
A signal receiving apparatus which can reduce a circuit scale to reduce a cost in a mobile wireless communication system which transmits and receives a spread spectrum signal is provided. The...
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8014471 |
Bit stream conditioning circuit having adjustable input sensitivity
A high-speed bit stream interface module interfaces a high-speed communication media to a communication Application Specific Integrated Circuit (ASIC) via a Printed Circuit Board (PCB). The...
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8001170 |
Equalizer system and filtering method
An equalizer system comprises a gain adjuster and a filter system. The gain adjuster provides a plurality of gain settings. The filter system is coupled to the gain adjuster and filters an input...
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7991078 |
Signal processing apparatus, signal processing method, and program
In a signal processing apparatus adapted to process a signal transmitted via a transmission path, distortion of a waveform of a signal value of a specific symbol is predicted on the basis of a...
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7987220 |
Computing filter coefficients for an equalizer in a communication receiver
The present invention provides an equalizer (200) and a method for computing equalizer filter coefficients in a communication receiver. The equalizer filter coefficients are computed on the basis...
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7978759 |
Scalable equalizer for multiple-in-multiple-out (MIMO) wireless transmission
Systems and techniques relating to processing information received from a spatially diverse transmission. In some implementations, a method comprises: obtaining a received signal that was...
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7974336 |
Equalization system and method thereof
An equalization system used in a communication receiver has multiple equalization stages. A front equalizer supplies equalization output to a feed back filter in a rear equalizer to speed...
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7953163 |
Block linear equalization in a multicarrier communication system
A method and apparatus for channel equalization in a multi-carrier communication system. The method may include receiving a symbol having multiple sub-carriers and reducing an error on at least one...
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7907738 |
Speaker equalization tool
A computer readable medium containing program instructions for controlling a parametric equalizer is provided. Generally, a computer readable code is provided for displaying a composite...
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7903727 |
Channel memory length selection method and apparatus for wireless communication systems
A channel memory length selection method for wireless communication systems is provided. The method comprises estimating an initial channel impulse response (CIR) for the wireless communication...
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7894517 |
Self-calibrated adaptive equalization system and methods of performing the same
A self-calibrating, adaptive equalization system for generating an ideal digital signal is disclosed. The adaptive equalization system includes an equalizer and a high-gain buffer. The equalizer...
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7885325 |
Apparatus for and method of controlling a feedforward filter of an equalizer
A method of synchronizing a feedforward filter (46) that receives a signal resulting from the transmission of a series of symbols through a channel, wherein the series of symbols includes a...
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7852914 |
Fade equalizer
Processing a received signal is disclosed. It is determined that a received signal does not satisfy a prescribed signal quality criterion. Based at least in part on the determination, an equalizer...
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7848405 |
Communication system
Forward and backward equalization processes are effectively used in a communication system for equalizing a received signal of a frame including a known symbol part. The known symbol part is...
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7839924 |
Partial response transmission system
A partial response signaling system includes a transmitter circuit configured to equalize input data in response to a control signal and to transmit a partial response signal through a transmission...
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