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WO/2004/015709A1 |
A variable cycle pulse signal and a sampling clock are input to counter means (32) in an adaptive signal processing (30). The input cycle is counted by the sampling clock and the count value is input to timing generation means (34). From...
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WO2002067422A9 |
An N dimensional signal processor using D scale non-uniform sampling is disclosed. The processor includes a multi-resolution sampler (A) for outputting a stream of non-uniformly spaced samples resulting in an overall average sampling rat...
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WO/2004/008707A1 |
An adaptive pre-equalizer (15) is disclosed to compensate amplitude ripples in a low cost transmitter pass-band filter (35, 200). A filtered-x LMS algorithm is proposed to calculate the equalizer coefficients (72). To this purpose, the m...
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WO/2003/103170A2 |
In digital communications, a considerable effort has been devoted to neutralise the effect of channels (i.e., the combination of transmit filters, media and receive filters) in transmission systems, so that the available channel bandwidt...
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WO/2003/085830A1 |
A computationally efficient, adaptive multistage Wiener filter employs two modules, a linear filter module that operates at the input data rate and an update module that operates at a plurality of rates but performs many calculations at ...
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WO/2003/084103A1 |
One preferred embodiment of the present invention provides systems (110) and methods (1200) for removing noise from an input analog signal in continuos time. Briefly described in architecture, one embodiment of the system (110), among ot...
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WO/2003/073612A2 |
A method of blind signal separation of convolutively mixed signals comprises firstly processing signals to produce second order independence. In a second step, and together with ranges of signal delay and rotation parameters, the resulti...
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WO2002014891A9 |
A radar detection process includes computing a derivative of an FFT output signal to detect an object within a specified detection zone. In one embodiment, a zero crossing in the second derivative of the FFT output signal indicates the p...
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WO/2003/071679A1 |
Systems and techniques for filtering digital samples are disclosed in which a number of filter coefficients are adapted, and the digital samples are filtered by applying one of the filter coefficients to a parameter, applying each remain...
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WO/2003/063352A1 |
Tuning of a filter circuit is accomplished by determining a real RC time constant value for the filter circuit, then comparing the real RC vale to a predetermined RC value. If the real RC value does not match the predetermined RC value, ...
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WO/2003/053033A1 |
An echo canceller comprises a signal input for a far end signal, an audio input for a distorted desired signal, an echo estimator coupled to the signal input, and a spectral subtracter coupled to the echo estimator and the audio input. T...
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WO/2003/050967A1 |
The invention relates to analog equalization filters used for wide bandwidth traffic reception in a digital subscriber line arrangement. The invention is based on the idea that a received signal is equalized at the receiving end, more pr...
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WO/2003/049285A2 |
A narrowband signal detector has an adaptable filter and controller for controlling the centre frequency and the bandwidth of the filter, to track the narrowband signal. Better control of the filter can be achieved by basing the filter c...
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WO/2003/044978A1 |
An echo canceller includes: an echo cancellation part canceling echo included in a near-end input signal; a noise suppression part employing a low-pass filter having a variable cut-off frequency adaptive to power of an input signal, the ...
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WO/2003/039089A1 |
The invention concerns an asynchronous receiver for digital transmission and recording systems. The receiver comprises a sampling rate converter (SRC) for timing recovery, preceded by a digital adaptive equalizer operating at the samplin...
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WO/2003/039012A1 |
The invention relates to an adaptive channel filter (10) for a receiver unit of a mobile communication system. Said filter contains a channel filter (20) having a variable pass-band width, and a means for controlling (30) the pass-band w...
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WO2002015323A9 |
A multiple beam array antenna system comprises a plurality of radiating elements provided from stripline-fed open-ended waveguide coupled to a Butler matrix beam forming network. The Butler matrix beam forming network is coupled to a swi...
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WO/2003/026236A2 |
Adaptive equalizers are provided that compensate for transmission losses in an input signal, when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a contro...
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WO/2003/016943A1 |
A near object detection (NOD) system includes a plurality of sensors, each of the sensors for providing detection coverage in a predetermined coverage zone. Each of the sensors includes a transmit antenna for transmitting a first RF sign...
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WO/2003/015275A1 |
An adaptive signal processing system for improving a quality of signal. The system includes an analysis filterbank for transforming a primary information signal in time domain into oversampled sub-band primary signals in frequency domain...
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WO/2003/015263A1 |
A system and method for compensating switched mode amplifier (110). The amplifier system includes an adaptive filter (114) coupled to the output of circuitry that recovers the analog signal from the output of the switching amplifier circ...
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WO/2003/015272A1 |
A filter adaptation unit suitable for producing a set of filter coefficients is provided including an error characterization unit for characterizing the error in a filter's impulse response, where the set filter coefficients determining ...
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WO/2003/015292A2 |
A filter is created by sampling noise during an inter−frame gap (110) of a received signal, sampling a data frame preamble (115) from within a data frame (105) of the received signal, and computing filter coefficients based on the nois...
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WO/2003/015274A1 |
A device and method for generating a set of filter coefficients is provided. Sequences of samples of a first and second signal are received where the second signal includes a certain component that is correlated to the first signal. A fi...
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WO/2003/015271A1 |
An apparatus and method suitable for producing a set of filter coefficients are provided. Sequences of samples of first and second signals are received by the apparatus. Each received sample is processed to update a set of auto-correlati...
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WO/2003/015273A1 |
A filter adaptation unit for producing a set of filter coefficients indicative of a transfer function of a system in a given state is provided including a coefficient set selection unit for selecting between two or more sets of filter co...
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WO/2003/014525A1 |
An electromagnetic borehole telemetry system providing improved signal to noise ratio is showned in Figure 1. Adaptive filters (28) use noise channels as references to remove noise form the signal channel. Improved sensors (40) provide n...
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WO/2003/009469A2 |
The invention relates to a filter circuit for processing an audio signal, comprising a first branch in which the audio signal is guided in an essentially unchanged state to an output summation stage, and a second branch comprising severa...
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WO/2003/005581A1 |
A receiver comprises an adaptive filter (22) having an input for a digitised input signal, means (30) for storing a pre-designed filter characteristic, means (26) for analysing a digital representation of the input signal to determine a ...
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WO/2003/001670A1 |
The invention relates to an adaptive Radio Frequency (RF) filter (11), which is particlarly useful as an RF filter in Wireless Local Area Networks (WLAN's). As greater demands are placed on RF systems, for example in WLAN's in order to i...
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WO/2002/097656A2 |
A signal processing method and an apparatus built on the basis of such a method are disclosed. The present invention provides a means of extraction of a more or less specified single sinusoidal component of a given nonstationary signal, ...
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WO/2002/091572A1 |
A method for an adaptive equalization apparatus (500) in a multiple-link hopping radio system includes hopping among a plurality of radio links to receive variable-length bursts of radio signals on the plurality of radio links and equali...
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WO/2002/080362A1 |
The present invention proposes a new method and apparatus for the improvement of digital filterbanks, by a complex extension of cosine modulated digital filterbanks. The invention employs complex-exponential modulation of a low-pass prot...
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WO2001028310A9 |
In one embodiment. a transceiver described and disclosed in the specification and drawings, and a local oscillator (LO) generator, a controller, and a self-test unit. All of these components are packaged for integration into a single IC,...
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WO/2002/061747A1 |
An adaptive equalizing circuit suitably used for the regeneration of a digital signal, and a regenerative device using it. A regenerative signal processed by a data generating circuit and its characteristic information are supplied to a ...
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WO/2002/061732A1 |
A computer system (108) that processes mixtures of signals, such as speech and noise sources derived from multiple simultaneous microphone recordings, in order to separate them into their underlying sources. A source separation routine (...
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WO/2002/060057A1 |
Described is a multichannel filter (20) which comprises $i(S) inputs for receiving S input signals (x¿$i(1)?..x¿$i(S)?) and at least $i(S) filters (14, 28) coupled to the S inputs for filtering the input signals (x¿$i(1)?..x¿$i(S)?) ...
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WO/2002/054387A1 |
A noise removing device comprising a conversion unit for converting an input signal into a frequency region, an SNR calculation unit for using a frequency region signal to determine a signal-to-noise ratio (SNR), a suppression factor gen...
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WO/2002/039682A2 |
The present invention relates to signal processing, and, in particular to a method and system for blind source separation which uses a measure of temporal predictability to identify a source signal from a mixture of such source signals. ...
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WO/2002/039584A1 |
An adaptive filter is implemented by a computer (10) processing an input signal using a recursive least squares lattice (RLSL) algorithm (12) to obtain forward and backward least squares prediction residuals. A prediction residual is the...
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WO/2002/037676A1 |
The present invention discloses an improved adaptive line enhancer comprising an adaptive Gray-Markel lattice notch filter having an adaptive notch frequency, in which the notch frequency is determined according to a notch frequency vari...
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WO/2002/035727A1 |
Quick real-time identification and estimation of a time-non-varying or time-varying system. A new H¿$m(w)? evaluation criterion is determined, a fast algorithm for a modified H¿$m(w)? filter based on the criterion is developed, and a q...
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WO/2002/019258A1 |
A method for analyzing data, the data characterized by a set of scalars and a set of vectors, to analyze the data into components related by statistical correlations. In preferred embodiments, the invention includes steps or devices for,...
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WO/2002/018969A1 |
The invention relates to a system and method for processing a signal being emitted from a target signal source (20) into a noisy environment, wherein said target signal source (20) is located in a target signal source direction $g(f)¿s?...
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WO/2002/017487A1 |
The partitioned block frequency domain adaptive filter according to the invention comprises a plurality of parallel arranged filter partitions. Each filter partition models a part of an impulse response of the adaptive filter and has upd...
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WO/2002/017488A1 |
The partitioned block frequency domain adaptive filter according to the invention comprises a plurality of parallel arranged filter partitions. Each filter partition models a part of an impulse response of the adaptive filter and has upd...
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WO/2002/014098A2 |
In accordance with the present invention, an adaptive cruise control system includes a radio frequency (RF) transmit receive (TR) sensor module (or more simply 'sensor') disposed such that a detection zone is deployed in front of a vehic...
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WO/2002/015396A1 |
A method of providing real time digital pulse shaping includes: receiving a digital pulse input signal (31); applying the digital pulse input signal to first (33, 34, 35) and second (32, 36, 37) processing channels, the first processing ...
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WO/2002/014898A2 |
A near object detection (NOD) system includes a plurality of sensors, each of the sensors for providing detection coverage in a predetermined coverage zone and each of the sensors including a transmit antenna for transmitting a first RF ...
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WO/2002/015334A1 |
A multiple beam array antenna system comprises a plurality of radiating elements (82) provided from stripline-fed open-ended waveguide coupled to a Butler matrix beam forming network (86). The Butler matrix beam forming network is couple...
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