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WO/2002/014900A2 |
A video amplifier for a radar receiver includes a temperature compensating attenuator. The attenuator includes a temperature sensitive device, such as a thermistor, arranged in a voltage divider network and is coupled in cascade between ...
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WO/2002/009582A2 |
A method and apparatus for implementing a signal morphology preservation smoothing scheme. The smoothing scheme includes generating an output signal representative of a filtered version of the input signal, wherein the output signal is g...
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WO/2002/009474A2 |
An audio signal processing device is described for deriving auxiliary audio signals, such as audio direction sensing signals or a centre audio signal from first and second audio signals through first and second filter paths, each of whic...
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WO/2001/095488A1 |
For the equalization of linearly distorted CPM-modulated signals an adaptive filter is used. The filter coefficients are adapted by instantaneous errors based on the constant modulus criterion. For stabilization, the coefficients are dri...
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WO/2001/084708A2 |
An input signal is filtered for creating an output signal using an adaptive filter. An error signal is derived from the output signal. The adaptive filter has coefficient whose value can be modified. A value of a coefficient is modified ...
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WO/2001/082474A2 |
The present invention, generally speaking, accelerates convergence of a fast RLS adaptation algorithm by, following processing of a burst of data, performing postprocessing to remove the effects of prewindowing, fictitious data initializ...
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WO/2001/067434A1 |
An active noise reduction system is provided having a novel configuration that uses a fixed point digital filter (20) to estimate an inverted replica of the acoustic noise (19) from the measurement of the control error (21) at some prede...
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WO/2001/065723A1 |
A training section (102) calculates a tap coefficient. An impulse response calculating section (103) calculates the impulse response of the tap coefficient. A tap selecting section (104) selects a tap on the basis of the magnitude of the...
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WO/2001/052411A2 |
A transmitter is disclosed for transmitting a transmission signal via a transmission medium. The transmitter derives a prediction signal from the digital information signal in dependence on an array of prediction filter coefficients. The...
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WO/2001/037435A2 |
A sensor array (10 sub.1-N) receiving system which incorporates one or more filters (16 sub.1-N) that are capable of adaptive and/or fixed operation. The filters are defined by a multiple of coefficients and the coefficients are set so a...
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WO/2001/033773A1 |
A wireless cable replacement system. A personal area network, comprising a device having a first wireless transceiver, and an adapter having a second wireless transceiver in communication with the first wireless transceiver, and a plug c...
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WO/2001/024416A1 |
A method and apparatus for the real-time creation of an output audio signal from an input signal (110) with an unwanted or noise portion (118). The system detects the unwanted portion (118) of the input signal by utilizing an adaptive de...
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WO/2001/017109A1 |
A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, the method accumulates a length of input signal (mixed signal) that comprises a plurality of indep...
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WO/2001/015007A1 |
A method and apparatus for determining the location of the peak of a signal using an adaptive filter bank. The method includes the steps of providing a set of calculated output points for the function using a predetermined calculation in...
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WO/2001/015320A1 |
A transversal filter for suppression of interfering signals in broadband communication systems is described. The filter has only one variable filter coefficient, A = f(a), while the coefficient in the last path always is equal to 1. a = ...
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WO/2001/013516A2 |
A feedforward filter (20) has a plurality of feedforward filter taps (23a-23g), including a feedforward filter reference tap (23d). The reference tap of the feedforward filter is positioned proximate a center position of the feedforward ...
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WO/2001/008306A1 |
The invention relates, in the field of subband decomposition, to the design of filter banks adapted to the input signal statistics. In most cases, two channel filter banks are iteratively applied over several levels of decomposition, the...
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WO/2001/001571A1 |
Stereo echo cancellation is necessary to overcome the objections observed by for example teleconferencing, voice controlled video/audio apparatuses etc.. To improve the existing filters the invention provides an adaptive filter and a sig...
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WO/2000/077953A1 |
An array combining unit (102) array-combines the received signals received by antennas. A most likelihood string estimating unit (106) outputs symbol string candidates for the array-combined received signals. A replica generating unit (1...
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WO2000005598A9 |
A family of multiple scale adaptive filters (20) and filtering methods (20) that automatically adapt their impulse response width to local data characteristics, optimizing the accuracy, yield, and/or detail of interferometric measurement...
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WO/2000/055969A1 |
A method and apparatus (100) is provided for impedance matching for a system capable of supporting voice and data bands. The method includes receiving an input signal having a voice and data band, filtering at least a portion of the data...
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WO/2000/054404A1 |
Device and method for separating a mixture of source signals to regain the source signals, the device and method being based on measured signals, the invention comprises: bringing each measured signal to a separation structure including ...
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WO/2000/051234A1 |
The invention relates to a method for improving the useful signal power/ disturb signal power ratio of an antenna (ANT), comprising at least one sensor (C¿1?-C¿N?), characterized in that said method consists in filtering the signal del...
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WO/2000/046802A1 |
High-order partial response is equalized so that the equalization difference of an input signal having nonlinear distortion is a minimum so as to improve the characteristics of a reproduced signal. An input signal is subjected to high-or...
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WO/2000/038319A1 |
Stable adaptive filter and method are disclosed. The invention solves a problem of instability associated with Fast Affine Projection adaptive filters caused by error accumulation in an inversion process of an auto-correlation matrix. Th...
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WO/2000/030264A1 |
A method of processing signals received from an array of sensors is disclosed comprising the steps of sampling and digitally converting the received signals and processing the digitally converted signals to provide an output signal, the ...
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WO/2000/025489A1 |
Parameters of a technical system are determined, wherein output signals consisting of a plurality of superimposed, statistically independent input signals can be detected. Parameters are detected in such a way that the statistical depend...
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WO/2000/019605A2 |
An improved method for adaptively cancelling acoustic feedback in hearing aids and other audio amplification devices. Feedback cancellation is limited to a frequency band that encompasses all unstable frequencies. By limiting the bandwid...
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WO/2000/013314A1 |
A method and apparatus for updating a precoder coefficients having a duplicate precoder (440) and a correction filter (450) in a receiver, where the correction filter (450) generates incremental coefficients. The incremental coefficients...
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WO/2000/008836A1 |
The invention concerns a device for processing digital data comprising a module (M2, M3) producing on a data vector of the frequency domain Z(k), wherein k varies from 0 to N-1, a convolution with a function U, convolution which correspo...
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WO/2000/008837A1 |
Methods and apparatus for echo and noise cancelation contemplate occasional saturation of an echo and/or noise containing source signal and control adaptation of a cancelation filter to minimize the detrimental effects of such source sig...
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WO/2000/004698A1 |
To achieve an improved convergence behaviour for, e.g., echo cancellation there is provided a digital adaptive filter comprising a filter coefficient update means (52; 78) to successively update filter coefficience in accordance with an ...
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WO/1999/066638A1 |
This invention unifies a set of statistical signal processing, neuromorphic systems, and microelectronic implementation techniques for blind separation and recovery of mixed signals. A set of architectures, frameworks, algorithms, and de...
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WO/1999/059336A1 |
The invention relates to a data processing device for recovering digital data which is received in an analogue transmitted signal. According to the invention, the received signal is digitized and a threshold is determined in a threshold ...
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WO/1999/059245A1 |
The invention relates to a method for calculating a least mean square algorithm using an N-tap filter. A modified least mean square algorithm is used for the calculation. In a first calculation step, calculation is effected using a first...
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WO/1999/054996A1 |
A digital filter includes a plurality of filter cells, each of which includes circuitry to determine a coefficient for the filter cell, to adjust the coefficient in accordance with a gain that is used by each of the plurality of filter c...
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WO/1999/053476A1 |
An active noise controller for muffling noise by giving forth pseudo-noise having the same amplitude as that of the noise and an opposite phase to that of the noise from a loudspeaker and acoustically superposing the pseudo-noise on the ...
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WO/1999/053615A2 |
Device and method for reduction of signal transients, where the signal is divided into frequency bands, the device at least comprising a transient detector (1), a calculating means, means for delaying a signal (2) and an adaptive filter....
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WO/1999/052211A1 |
A method and apparatus that performs blind source separation usign convolutive signal decorrelation. More specifically, the method accumulates a length of input signal (mixed signal) that comprises a plurality of independent signals from...
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WO/1999/044286A2 |
A digital filter (1) has a filter cell (4a) for generating processed data. The digital filter cell includes plurality of coefficient registers (14) which are arranged to circulate a plurality of coefficient values that correspond to a pl...
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WO/1999/039497A1 |
A beamformer is calibrated for use as an acoustic echo canceler in a hands-free communications environment having a loudspeaker and a plurality of microphones. To perform the calibration, a number of adaptive filters are provided in corr...
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WO/1999/038155A1 |
The invention relates to the coding of speech at a variable bit rate, whereby the bit rates can vary from frame to frame, and more specifically to the methods and filters used for improving the quality of the decoded speech. In the solut...
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WO/1999/038029A1 |
The invention relates to a signal-echo surveillance device, comprising at least one transmitting unit for emitting a signal, a receiving unit for receiving an echo signal of the emitted signal reflected by an object, and a control and ev...
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WO/1999/029094A1 |
A novel method and apparatus are disclosed for cancelling echoes originating from a digital mobile handset using an echo canceller (10) located in the network. The method and apparatus thus solve a practical echo problem that many mobile...
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WO/1999/026401A1 |
An echo canceller circuit (25) for use in an echo canceller system is set forth that provides sensitive non-linear echo path response detection (300). The echo canceller circuit (25) comprises a first digital filter (35) having non-adapt...
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WO/1999/026400A1 |
An echo canceler circuit (25) for use in an echo canceller system is set forth. The echo canceller circuit (25) comprises a first digital filter (35) having non-adaptive tap coefficients to simulate an echo response occurring during a ca...
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WO/1999/026402A1 |
An echo canceller circuit (25) for use in an echo canceller system is set forth. The echo canceller circuit (25) comprises a first digital filter (35) having non-adaptive tap coefficients to simulate an echo response occurring during a c...
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WO/1999/026355A1 |
An acoustic echo canceller (AEC) is devised and tested in a real environment. The devised AEC puts together a number of available digital signal processing methods to make a real-time implementation of the AEC possible. The echo length c...
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WO/1999/026399A1 |
An echo canceller circuit (25) is set forth. The echo canceller circuit (25) includes a digital filter (30) having adaptive tap coefficients to simulate an echo response occurring during a call. The adaptive tap coefficients are updated ...
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WO/1999/018666A1 |
A new signal processing method and a signal processing engine which can achieve extremely fast responsiveness to instantaneous changes in the behavior of the signal, and maintain the accuracy of standard harmonic methods. The signal proc...
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