Document 
Document Title 
WO/2002/023721A1 
A digital low pass filter of the FIR type stores the input signal into register means with a plurality of taps. These taps are connected to address a look up table and the filtered output signal is derived from the output of the look up ...

WO2001056167A3 
A simplified algorithm for digital signal interpolation and a novel architecture to implement the algorithm in an integrated circuit ("IC") with significant space constraints are presented. According to the embodiments of the present inv...

WO/2002/021688A1 
The invention relates to a method and to a device for converting a first scanning frequency (f¿A?) of a digitized analog signal to one or more scanning frequencies (f¿B?, f¿C?, f¿D?). The invention is further characterized in that th...

WO/2002/019150A1 
The invention pertains to systems that sample a continuous analog timedomain signal. The invention is particularly applicable to systems whose analog components have a bandwidth limit below that desired or specified. The invention has b...

WO2001071874A3 
A twostage filter (20) for a circuit protection device. The filter includes a first filtering device (22) connected to receive an input signal v, the first filtering device (22) generating an intermediate signal v1, (1), where k is a sa...

WO/2002/017486A1 
A method for long impulse response digital filtering of an input data stream, by use of a digital filtering system. Where the input data stream is divided into zeroinput signals and zerostate signals. One of the zeroinput signals and ...

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...

WO2001058017A3 
An areaefficient finite impulse response filter having permuted bitorder functional elements that provide substantially straight and direct interconnects with minimized length between adjacent elements. A functional element is coupled ...

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...

WO2001071931A3 
A digital tuner (70) for maximizing tuning range for a particular intermediate frequency includes an analogtodigital converter (78) operating at an input clock frequency to sample an analog input signal (76) and output a multibit digi...

WO/2002/009091A1 
A device and a method for compressing signal information by removing (thinning out) the signal component of a signal in a specific frequency band. Firstly an input timeseries signal (e.g., a PCM signal) is converted by an analyzer (11) ...

WO/2002/003382A1 
A method for the conversion of LSF to LPC coefficients (Line Spectral Frequencies to Linear Prediction Coefficients) to avoid excessive growth of intermediate coefficients during calculation of polynomial products. The symmetric and anti...

WO/2002/003550A1 
The invention relates to an interpolation filter and to a method for filtering a digital input signal. The interpolation filter has an amplitude characteristic with a lowpassshaped damping curve in the useful signal frequency range of ...

WO/2001/099277A1 
A method for conversion of input audio frequency data, at an input sample frequency, to output audio frequency data, at an output sample frequency. The input data is subjected to expansion to produce expanded data at an output sample fre...

WO/2001/099279A1 
A signal peak reduction circuit (10), comprising: a bandlimiting filter (13) for limiting the bandwidth of a data bearing signal, a predictive filter (12) for predicting peaks in the data bearing signal at the output of the pulseshapin...

WO2001056154A3 
A digital filter is disclosed, which is characterised, in that at least one of the multipliers in sequential multiplication procedures and/or at least one of the adders in sequential adding procedures, may be fed data representing variou...

WO/2001/097376A1 
The invention relates to a digital comb filter, which comprises n filter stages, whereby each filter stage has a retaining member located at the input of the filter stage. Said retaining member doubles the sampling rate by outputting eac...

WO/2001/097475A1 
An adaptive channel equalizer with adaptive coefficients for compensating for long delays multipaths and distortions. A training sequence is periodically sent over the channel and the adaptive coefficients of the equalizer are periodical...

WO2001045253A3 
The aim of the invention is the offset compensation of a digital signal (r), especially a communications signal that is transmitted in a cordless digital communications system. According to the invention, a recursive digital filter is us...

WO2001052546A3 
A filter structure is provided that facilitates the use of the filter as either a continuous delay Farrow filter or a selectable delay polyphase filter. The less complex polyphase filter is used when the desired scale substantially corre...

WO/2001/089086A1 
Modeling a target spectrum (S) is provided by determining (21) filter parameters (p¿i?,q¿i?) of a filter which has a frequency response approximating the target spectrum (S), wherein the target spectrum is split in at least a first par...

WO/2001/089087A1 
An equalizer substantially eliminates a ghost of a received main signal by (i) applying coefficients b (where b may be equal to one) to the received main signal and the ghost in order to modulatethe received main signal and the ghost so ...

WO/2001/089085A1 
A smallsized and powersaving matched filter circuit is provided. A succeeding stage of a matched filter includes a group of n hold circuits (H21, H22,..., H2n) to which the output signals (Dout1) from a preceding stage are coupled in p...

WO/2001/086808A1 
A digital filter is disclosed, the filter comprising means for determining of a partial filter input initial condition, using a partitioned filter input signal (5010), and partitioned filter input coefficients (5055), means for determini...

WO2001025731A3 
The present invention relates to a method for weighing items and in particular to a method of filtering signals representing the weight of an item. The invention is applicable in all measuring instruments which indicate an average value ...

WO2001043285A3 
The present invention is directed to a reconfigurable finite impulse response (FIR) filter that processes data tap values with canonical sign digit (CSD) coefficients. The FIR filter according to the present invention includes a shift gr...

WO/2001/084707A2 
A apparatus for computing coefficient values for configuring a digital filter for compensating for nonlinearity of an RF/IF device. The apparatus includes a reference signal generator, connected to an input of the RF/IF device, for gene...

WO/2001/084734A2 
A matched filter requiring no highspeed processor and which consumes less power is disclosed. Partial filters 301  30N obtained by dividing number of matched filter taps by N are provided with a controller 341 for controlling which par...

WO/2001/076115A1 
A method for determining correlation using a matched filter in which despreading operation is performing by fixing received data and scanning a despread code. The despread results are integrated for each of the symbol parts before and af...

WO/2001/073947A1 
An arbitrary sample rate conversion apparatus is described. This apparatus includes a buffer (10) for forming blocks of input samples having a first sample rate. For each block of input samples a subfilter is selected from a polyphase fi...

WO/2001/071931A2 
A digital tuner (70) for maximizing tuning range for a particular intermediate frequency includes an analogtodigital converter (78) operating at an input clock frequency to sample an analog input signal (76) and output a multibit digi...

WO/2001/071874A2 
A twostage filter (20) for a circuit protection device. The filter includes a first filtering device (22) connected to receive an input signal v, the first filtering device (22) generating an intermediate signal v1, (1), where k is a sa...

WO/2001/065485A1 
In response to an incoming signal, a coefficient is determined by delay means (10, 11), coefficient multiplication means (20, 21, 22), summing means (30, 31, 32), and offset means (40). Coefficient multiplication means (23) multiplies th...

WO/2001/065692A1 
An apparatus for frequency content separating an input signal, said apparatus comprising a plurality of frequency splitting stages, each stage including one or more upconverter and downconverter pairs, an upconverter and downconverte...

WO/2001/065713A1 
A signal filter comprises a plurality of adding elements (21), each of which has first and second inputs and an output and is operable to provide an output signal representative of the sum of a pair of input signals. The filter also incl...

WO/2001/063464A1 
A wave digital filter which includes a plurality of memoryless adapters (42) each having two or more ports, each port including an input and an output, and at least one controlled gate (44) which delays the propagation of a value into at...

WO/2001/063867A1 
A receiver comprising A/D converters (11 to 14) for converting received analog signals (I1, Q1, I2, Q2) into digital signals, a quantization error reducing signal generator (2) for generating quantization error reducing signals for ran...

WO/2001/057877A1 
A sampling system includes an input terminal for receiving a data signal having a signal component and possibly a noise component. A sampler samples the data signal at a sample rate set in responsive to a control signal. A noise detector...

WO/2001/058017A2 
An areaefficient finite impulse response filter having permuted bitorder functional elements that provide substantially straight and direct interconnects with minimized length between adjacent elements. A functional element is coupled ...

WO/2001/056154A2 
A digital filter is disclosed, which is characterised, in that at least one of the multipliers in sequential multiplication procedures and/or at least one of the adders in sequential adding procedures, may be fed data representing variou...

WO/2001/056167A2 
A simplified algorithm for digital signal interpolation and a novel architecture to implement the algorithm in an integrated circuit ('IC') with significant space constraints are presented. According to the embodiments of the present inv...

WO/2001/056157A1 
A band pass filter (80) includes a pair of filters (82, 83) having different center frequencies and a difference amplifier (84) coupled to the outputs of the filters. The filters preferably have response curves that intersect at 3 dB. T...

WO/2001/056156A1 
An electrical signal is applied to a band pass filter (42), a first notch filter (43), and a second notch filter (44) in any order. The center frequencies of the notch filters straddle the pass band of the band pass filter. The notch fil...

WO/2001/054312A1 
A space profile determining section (102) determines the distribution of strength of the received signal with respect to the direction of arrival of a signal, namely, determines the space profile or space information by using the receive...

WO/2001/052546A2 
A filter structure is provided that facilitates the use of the filter as either a continuous delay Farrow filter or a selectable delay polyphase filter. The less complex polyphase filter is used when the desired scale substantially corre...

WO2000065713A3 
Sample rate converters are known, and are used to convert a signal with a first sample rate (sampling frequency) into a signal with a second sample rate (sampling frequency). To obtain a flexible sample rate converter with sampling frequ...

WO/2001/048924A1 
A band pass filter (50) includes a pair of notch filters (51, 52) having different notch frequencies and a difference amplifier (54) coupled to the outputs of the notch filters. The notch filters preferably have response curves that inte...

WO/2001/047143A1 
A lattice filter (201) determines a backward prediction error and a backward reflectance by using an input signal sequence. A tap coefficient calculating section (202) calculates a tap coefficient by using a reference signal and a backwa...

WO/2001/046953A1 
An arrangement is disclosed for receiving a digital signal from a transmission medium. The arrangement comprises a variable equalizer (6) for equalizing a received signal so as to obtain an equalized signal, and a bitdetector (12) for d...

WO/2001/045268A1 
An oversampling circuit and a digital/analog converter which have small circuit scales and the component costs of which are reduced. The oversampling circuit comprises a multiplying section (1), four data holding sections (21 to 24), f...
