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WO/2007/119766A1 |
A large-scale sound system or communication system is numerically and stably identified. When an input signal is represented by the M(≤ N)-th order AR model, high-speed H∞ filtering can be performed with a computational complex 3N + ...
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WO/2007/115010A1 |
A noise level of an input signal is determined by a noise calculation module. based on the noise level, a boundary setting module sets a reduced constellation boundary interval. This reduced constellation boundary interval is employed by...
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WO/2007/105152A2 |
There is provided a method that comprises identifying a parasitic signal transfer in a filter using a signal-directed graph; and adding compensation paths to the filter to reduce or eliminate the effect of the parasitic signal transfer. ...
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WO/2007/096466A1 |
Information on orbits like those of the Global Navigation Satellite Systems (GNSS) or other transmitters is collected in Near Real-Time (NRT) from global or local computing centres like those of the IGS. Carrier-phase reconstructions of ...
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WO/2007/091363A1 |
An adaptive digital filter for removing the influence of the characteristics of a transmission channel such as a multipath from the digital demodulated signal and removing the influence of the DC component included in the demodulated sig...
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WO/2007/051693A2 |
An apparatus, system, and method are disclosed for adaptive asynchronous equalization using leakage. An equalizer sums products of a plurality of tap signals from a delay line sampling a read signal and a plurality of corresponding tap c...
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WO/2007/048682A1 |
An unknown transmission function comprising an input signal (x) and an actual output signal (y) is estimated. According to the invention, an estimated output signal (y) is generated by means of an adaptive process (2) using the input sig...
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WO/2007/048692A1 |
An unknown transmission function (H) comprising an input signal (x) and an actual output signal (d) is estimated. According to the invention, an estimated output signal (y) is generated by means of an adaptive process (2) using the input...
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WO/2007/020324A1 |
An impedance matching system may be used, for example, for impedance matching between a transmitter/receiver front-end and an antenna in a mobile communication device. In a tunable impedance matching system according to the invention a t...
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WO/2007/013315A1 |
[PROBLEMS] To provide an adaptive filter capable of sufficiently reducing a mean square error of an error signal. [MEANS FOR SOLVING PROBLEMS] An adaptive filter includes: a first transversal filter (11) for inputting an input signal; a ...
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WO/2007/010889A1 |
An adaptive digital filter includes: a filter unit having a plurality of multipliers (3360 to 336N-1) grouped into at least one multiplier and the other multipliers according to expectation values of filter coefficients and generating a ...
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WO/2007/010849A1 |
An adaptive digital filter includes: a filter unit for generating an output signal by convolution of an input signal and a filter coefficient for output: or a filter unit for inputting a complex signal having two signals generated from o...
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WO/2007/010678A1 |
An input terminal (301) receives a complex signal having, in its real and imaginary parts, one and the other of two signals, respectively, which are generated from a single real signal and which are deviated in phase from each other by 9...
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WO/2007/010727A1 |
A complex signal having one signal in a real part and the other signal in an imaginary part, the two signal being generated from one real signal and having phases shifted by 90 degrees from each other, is inputted into an input terminal ...
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WO/2006/097771A1 |
A method for estimating a system state, for example an aircraft trajectory, in a decentralised network having a plurality of nodes, each node having means for receiving and sending information and means for processing information, and ea...
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WO/2006/095861A1 |
An unknown system structure estimation device includes an adaptive FIR filter. A signal inputted to the unknown system having resonance characteristic is inputted as a main input signal to the adaptive FIR filter. A signal obtained by su...
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WO/2006/083432A1 |
A reconfigurable circuit and a related method for its use, the circuit including multiple microelectromechanical systems (MEMS) switches connected between selected points in the circuit. The MEMS switches are controlled to select a desir...
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WO/2006/039826A1 |
The invention relates to a method for estimating an unknown transfer function (H) which comprises an input signal (x) and an actual output signal (y). According to the invention, an estimated output signal (y) is generated in an adaptive...
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WO/2006/036662A2 |
Analogue feed forward equalizer using same delay elements for filter adaptive weight control circuit. Three embodiments.1: locking up due to all coefficients being zero during initialisation avoided by centre spike initialisation method....
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WO/2006/017934A1 |
A method of adaptive filtering using fast affine projection (FAP) that allows for direct solution of the projected error vector from the autocorrelation matrix using a backward and forward recursion technique or LDLT factorization of the...
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WO/2006/000675A1 |
The invention relates to a method for controlling microbiological process in a liquid microbial population-containing medium consisting in on-line measuring at least one state variable related to the microbiological process and in utilis...
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WO/2005/099092A1 |
A signal processor (10) realizing the second order term of a second order Voltera filter comprising multipliers for multiplying first and second input signals wherein each multiplier comprises one or more delay circuits connected in seri...
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WO/2005/072331A2 |
A digital communication transmitter serves as a signal path (10) which uses an adaptive equalizer (18) in a predistortion role. The adaptive equalizer (18) pre-distorts a complex digital communication signal (12) that need not exhibit an...
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WO/2005/071848A1 |
An equalization circuit is disclosed that enables high data rate transmission over high loss communications channels. Also disclosed is a set of functional blocks and update criteria that allow for the equalization function to be adapted...
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WO/2005/069491A2 |
The present invention concerns a method of filtering an input binary string W for obtaining an output binary string Y, the method being characterised in that it comprises, for each one of one or more first substrings wj having nj bits at...
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WO/2005/067236A1 |
Disclosed are a system, method and device for generating an equalized signal from an input signal. Symbols in the equalized signal may be detected on each of a sequence of symbol intervals to recover a symbol value in the symbol interval...
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WO/2005/067143A2 |
Disclosed are a multi-tap filter, and method of using same, to filter an analog input signal to provide an equalized analog signal. Each of a plurality of coefficients in the multi-tap filter may be updated based, at least in part, upon ...
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WO/2005/062475A1 |
A method and apparatus for dynamically inserting gain in an adaptive filter is taught. This selective insertion of gain may be used to allow an adaptive filter to converge more quickly and/or to overcome inherent limitations of the adapt...
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WO/2005/050835A1 |
The invention relates to a method for adapting an amplitude characteristic of an adjustable HF band-pass filter (TD1, TD2, HD1, HD2). The inventive method is characterized by adapting a currently detected amplitude characteristic in acco...
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WO/2005/050622A1 |
A method and apparatus for reducing echo in a communication system are provided. A first signal including a voice component associated to a speaker is received. The first signal is processed to derive a harmonic feature of the voice comp...
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WO/2005/045829A1 |
A filter coefficient adjusting circuit includes a coefficient adjusting circuit (2) that performs equivalent coefficient adjustments by weighting, by factors of n and (2 - n), the initial values of the equivalent coefficients located on ...
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WO/2005/027541A1 |
Processing of a received telephone-signal to limit soundpressure from an earpiece(3) involves frequency-dependent limitation (7) after DTMF-tone suppression (5, 6). The energies (SyN) of synthesised frequency-components (1-N) of the samp...
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WO/2005/027445A1 |
An adaptive equalizer finite impulse response (FIR) filter for high-speed communication channels with modest complexity, where the filter is iteratively updated during a training sequence by a circuit performing the update: h (t + 1) = h...
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WO/2005/027446A1 |
An adaptive equalizer finite impulse response (FIR) filter for high-speed communication channels with modest complexity, where the filter is iteratively updated during a training sequence by a circuit performing the update: (I), where (I...
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WO/2005/024822A1 |
As shown in Fig. 1, a reproduced signal processor (100) comprises a pattern predictor (103) for predicting a prediction value which is a data sequence of a reproduced signal X and judging whether or not the prediction value agrees with a...
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WO/2005/024787A1 |
A signal processing apparatus comprising a first adaptive filter for receiving a first signal to generate a first pseudo signal; a first subtractor for subtracting the first pseudo signal from a second signal to output a first difference...
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WO/2005/022751A1 |
An adaptive lock position circuit includes a jitter distribution extremity detector and a phase shifting circuit. The jitter distribution extremity detector receives an input data signal and is operable to compare the input data signal w...
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WO/2005/022750A1 |
In accordance with the teachings described herein, systems and methods are provided for a precision adaptive equalizer. A variable gain equalizer may be used to apply a variable gain to an input signal to generate an equalized output sig...
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WO/2005/015737A1 |
It is possible to establish an estimation method capable of logically and optimally deciding a forgetting coefficient and develop an estimation algorithm and a high-speed algorithm which are numerically stable. Firstly, a processing sect...
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WO/2005/004328A1 |
A frequency dependent gain circuit is coupled to an output of an amplifier (402). The gain circuit provides at least two ranges of frequency dependent gain characteristics (V&num 1-V&num n) in response to the output of the amplifier. A c...
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WO/2004/095701A1 |
The invention relates to a method for filtering. In the method an adaptive filtering is performed to an input signal (x(n)). The filtered signal is further interpolated. The input signal (x(n)) is also interpolated for adapting the adapt...
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WO/2004/082321A2 |
The present invention provides method and apparatus that improve processing of acoustic signals by reducing acoustic feedback in an acoustic system. An aspect of the invention is a multi-channel digital feedback reducer (DFR) system that...
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WO/2004/059899A2 |
An adaptive coefficient signal generator for use in an adaptive signal equalizer with fractionally-spaced feedback. The signals representing the feedback tap coefficients are generated in conjunction with a timing interpolation parameter...
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WO/2004/053839A1 |
A system and method for separating a mixture of audio signal into desired audio signals (430) (e.g., speech) and a noise signal (440) is disclosed. Microphones (310, 320) are positioned to receive the mixed audio signals, and an independ...
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WO/2004/051648A1 |
There are provided an adaptive equalization circuit and an adaptive equalization method capable of performing a preferable signal processing of high calculation accuracy with a small size and improving the reproduction signal quality and...
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WO/2004/038947A1 |
A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver (508) and a front-end processing and despreading component (510) in electronic communication with the r...
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WO/2004/038949A1 |
A processing device and a processing method for suppressing the operation speed of an LSI and reducing the size, weight, and cost of a mobile terminal. Adders (120a-1 to 4) calculate a channel estimation coefficient after updating accord...
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WO/2004/038600A1 |
A reconfigurable filter node including an input data memory adapted to store a plurality of input data values, a filter coefficient memory adapted to store a plurality of filter coefficient values, and a plurality of computational units ...
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WO/2004/017303A1 |
A method and system for processing subband signals using adaptive filters is provided. The system is implemented on an oversampled WOLA filterbank. Inputs signals are oversampled. The system includes an adaptive filter for each subband, ...
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WO/2004/015861A1 |
A matching network for performing frequency tuned matching between a source and a load. The matching network includes a first capacitor and first inductor, having fixed values, coupled in series from an input port to an output port. A se...
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