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Patent Searching and Data


Matches 701 - 750 out of 13,093

Document Document Title
WO2000054142A3
The invention relates to a device for comparing data sequences. The device can be used especially for determining the channel impulse response in mobile radiotelephone systems by comparing a receive sequence (r(t)) with a pilot sequence ...  
WO/2002/073615A1
When data from an optical recording medium is demodulated, the data demodulation rate is variable in accordance with a reproduction state. Thus, it is possible to maintain a preferable read performance and reduce power consumption. As me...  
WO/2002/071620A1
While a digital input is oversampled up to eight times to process and the oversample data into a specified digital fundamental waveform with multipliers/adders (4-10) to carry out only folding operation with delay circuits 11¿-1?-11¿-4...  
WO/2002/071617A1
A self-tuning filter is disclosed. The self-tuning filter includes a digital clocking signal and an input coupled to the digital clocking signal, whereby the input reads a value incident on the input when the digital clocking signal chan...  
WO/2002/071256A1
A method for finding optimal filter coefficients includes selecting a wavelet basis k parameters (102). The waveleet basis is reparameterized into k/2 rotation parameters (108) and factorized into a product of rotation and delay matrices...  
WO/2002/069491A1
A method for measuring system clock signal frequency variations is disclosed, whereby the number of search operations can be limited to 2log n, where n is the number of elements (signal values) within the sliding window used. A binary tr...  
WO/2002/069492A2
A highly-programmable Finite Impulse Response (FIR) digital filter overcomes the limitations of conventional configurations. Specifically, a compound FIR filter configuration is provided, offering the advantages of heightened programmabi...  
WO/2002/067422A2
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...  
WO2002009582A3
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...  
WO/2002/063764A1
A digital FIR filter is provided that inputs a series of data samples x[0]x[n] and generates a partial sum output PS[i] where i$m(F)n. The partial sum output is a weighted version of the difference between a partial sum of the previous i...  
WO/2002/060261A2
An electronic filter operates as a correlator that provides a discrete approximation of an analog signal (Figure 1, 10, 11, 12, 13). The analog to digital conversion is integrated directly approximation calculation. An array of sample an...  
WO/2002/060056A2
The present invention comprises a method of obtaining coefficients for a transmit filter such that the power spectral density of the output for the different frequencies comes close to but does not exceed a maximum power spectral density...  
WO/2002/060114A2
A multi−carrier filter for a wireless communications system employing a multi−carrier signal. The multi−carrier filter includes a first mechanism for receiving the multi−carrier signal and extracting carrier signal components A s...  
WO2002037675A8
The invention relates to a filtering method and a filter implementing the filtering method. In the solution, a signal is filtered by at least one real FIR filter (22) having at least one stop frequency pair whose different frequencies ar...  
WO/2002/058244A1
Data to be compressed is differentiated for respective sampling points (S1-S20) and their absolute values are sequentially added to obtain differential total data (D1-D20). Then sampling points, where when data between two sampling point...  
WO2002039727A3
The invention relates to a method and apparatus for detecting asymmetry in transient signals and to a method and apparatus for correcting such asymmetry. In the apparatus for detecting asymmetry there is provided a pre-shoot filter (1) f...  
WO/2002/056468A2
The present invention is directed to efficient and accurate filtering and interpolation techniques. Methods of the present invention reduce the number of required operations and reduce computational errors in the filtering and interpolat...  
WO/2002/054350A2
A multiplierless pyramid filter is described comprising a sequence of scalable cascaded units, each of said units comprising a delay unit and three the adders, said delay unit the adders being coupled to produce a higher order pyramidall...  
WO1999009648A3
An audio processing system is used to process digital audio signals that represent sound emanating from a source that is moving through three dimensional space. The audio processing system has a filter unit that employs infinite impulse ...  
WO/2002/051083A1
An IQ modulator and method for modulating a signal in accordance with I and Q symbols using derivative FIR's operating at the symbol rate and programmable multi-accumulators for waveform generator.This provides advantages that reduced co...  
WO/2002/051003A2
A method and device are described for generating two output signals (I; Q) each substantially identical to a square-wave input signal (A) from a local oscillator (2), wherein the first output signal (I) may have a certain time shift with...  
WO/2002/048904A1
An FIR decimation filter includes the a shift register (51) having M flip-flops arranged in M/R rows (52, 54, 56, 58) of R bits. Each row has a left tap and a right tap. The rows are grouped into upper half and lower half sections. The s...  
WO/2002/047262A2
A filtering method is proposed wherein first several filtering steps (I-III,IV-VI) are made. Each step (I-III,IV-VI) includes: generating a filtered signal (I,IV), rounding this filtered signal (II,V) to a certain accuracy and combining ...  
WO/2002/047296A1
An analog filter comprises first and second arithmetic operation sections (2¿-1?, 2¿-2?) connected in series and each composed of processing circuits connetected in series. Each processing circuit includes an S/H circuit of plural stag...  
WO/2002/047258A2
A filter (26) is used to average power values of a signal that has been subjected to varying gain. The gain is factorised into two factors, the first being the highest power of 2 within the gain, and the second being a factor which can b...  
WO2001089086A8
Modeling a target spectrum (S) is provided by determining (21) filter parameters (pi,qi) of a filter which has a frequency response approximating the target spectrum (S), wherein the target spectrum is split in at least a first part and ...  
WO2001084707A3
A apparatus for computing coefficient values for configuring a digital filter for compensating for non-linearity of an RF/IF device. The apparatus includes a reference signal generator, connected to an input of the RF/IF device, for gene...  
WO/2002/041490A2
A system for digital filtering includes a set of logic gates, a state storage, and a multiplexer. The state storage includes two or more storage banks and may also include combinatorial logic and/or at least one lookup table. In one appl...  
WO/2002/039727A2
The invention relates to a method and apparatus for detecting asymmetry in transient signals and to a method and apparatus for correcting such asymmetry. In the apparatus for detecting asymmetry there is provided a pre-shoot filter (1) f...  
WO/2002/037675A1
The invention relates to a filtering method and a filter implementing the filtering method. In the solution, a signal is filtered by at least one real FIR filter (22) having at least one stop frequency pair whose different frequencies ar...  
WO/2002/031977A1
The invention concerns a finite impulse response filtering device having a transfer function comprising P coefficients, designated c¿q?, wherein P$m(G)1 is a predetermined integer. The invention is characterised in that in such a device...  
WO2001084734A3
A matched filter requiring no high-speed 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/2002/025476A1
An analog FIR filter (500) that processes multiple output samples in parallel is disclosed. The simultaneous parallel processing of multiple samples permits improved sampling rate and improved accuracy as compared to prior art filters.  
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 time-domain 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 two-stage 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 zero-input signals and zero-state signals. One of the zero-input 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 area-efficient finite impulse response filter having permuted bit-order 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 analog-to-digital converter (78) operating at an input clock frequency to sample an analog input signal (76) and output a multi-bit 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 time-series 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 low-pass-shaped 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 band-limiting 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 pulse-shapin...  
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...  

Matches 701 - 750 out of 13,093