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Patent Searching and Data


Matches 651 - 700 out of 13,158

Document Document Title
WO/2003/049316A1
The present invention discloses a limited impulse response digital filter for wireless mobile communication system. The limited impulse response digital filter provides very good bandlimited property and preferable robustness for samplin...  
WO/2003/049395A1
A multirate digital transceiver in which, on reception, signals are simultaneously decimated and coarsely down converted in an iterative process to narrow down a received wideband to a desired channel and, on transmission, signals are in...  
WO/2003/047320A1
The present invention relates to an operating device for a discharge lamp, comprising a power supply circuit for supplying power to the discharge lamp from a supply voltage, means for measuring at least one of the actual lamp current, th...  
WO/2003/047097A1
It is possible to easily design an FIR filter having an arbitrary frequency characteristic only by inputting a waveform of a desired frequency characteristic as an image without having any special knowledge, i.e., by inputting a waveform...  
WO/2003/047091A2
A data processing circuit for a communication receiver comprises an input path (23), a control (27), a sign modifying module (29), first and second delay elements (31, 33), first and second multiplying means (35, 37) and a summing module...  
WO2002078182A3
This invention relates to an integrated circuit comprising a two-dimensional pyramid filter architecture of order 2N-1, where N is a positive integer greater than two. With this architecture reduction of computational complexity or proce...  
WO/2003/044950A1
A time discrete filter comprises a sampling rate converter provided with an input and an output, and a down−sampler having a down−sampling factor nd. The time discrete filter further comprises an up−sampler having an up−sampling ...  
WO2003015292A3
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 noise sample...  
WO2003005356A3
The waveform equalizer (6) for obtaining a corrected signal S' by performing a waveform equalization to a read signal S read out from an information carrier (1). The waveform equalizer (6) has a first filter (61) able to perform a filter...  
WO/2003/039125A1
In telecommunication networks it is particularly necessary to separate signals of various frequency regions from each other, particularly by means of low-pass filters. In said low-pass filter a signal is tapped from a tapping point in a ...  
WO/2003/036794A1
In the present invention a multi-bit time-delay adjuster using Radio Frequency (RF) MicroElectroMechanical (MEM) switches is disclosed for applications in MCPAs with feed-forward linearization technique. The MEM switching system used in ...  
WO/2003/034917A1
A detector for detecting a cardiac event in an IEGM comprises a bank of digital filters. The filter bank comprises at least two filters with substantially different impulse responses corresponding to different properties of said event. T...  
WO2003014961A3
An apparatus and method for filtering data that include retrieving a plurality of data samples from memory; computing a locus of the samples; computing a distance between an input value and the locus; comparing the distance between the i...  
WO/2003/032496A1
Method and arrangement for converting the sample rate of a higher sample rate discrete time signal to a lower sample rate discrete time signal or vice versa. A recursive signal processing algorithm with low pass filtering function is use...  
WO/2003/032488A1
The invention concerns a method and a system for estimating parameters based on a Kalman filter. The invention is characterized in that it consists in taking into account two different input parameters at different points of the Kalman f...  
WO/2003/032489A1
A digital filter and filtering method uses a rate of change limit and an acceleration limit to significantly attenuate high bandwidth noise signals with minimal phase lag, simultaneously passing low bandwidth signals substantially uncorr...  
WO2002097986A3
A hardware-configurable digital filter (100) is adaptable for providing multiple filtering modes. In one embodiment, the digital filter includes a register-based array (112) of logic circuitry, computational circuitry (114) and mode sele...  
WO/2003/028327A2
A circular filtering system which prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these samples to a linear filter such that th...  
WO/2003/028213A1
A method of searching for a best-match decimation vector of decimation factors for non-uniform filter bank, the best match vector allowing perfect or near-perfect reconstruction of an input signal of the non-uniform filter bank, the meth...  
WO/2003/023960A1
A method for designing a digital filter for outputting a signal that is the sum of the products of multiplication of the signals at the taps of delay units (11−16) by the filter factors given by factor units (21−25), several times of...  
WO2002069491A8
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/2003/023959A1
In a filtering system, a first input receives a signal contaminated with noise. A second input receives a noise reference signal. Each notch filter in a set of M notch filters is responsive to a corresponding tuning coefficient so as to ...  
WO/2003/023961A1
A filter circuit is composed of FIR filters, and the filter factor is of a symmetrical type, thereby realizing a linear phase characteristic and preventing phase distortion even if a desired frequency band is emphasized. The first filter...  
WO/2003/021813A1
A radio apparatus is provided with analog RF circuits (1−4) by corresponding to antennas (A1−A4), and the circuits’ outputs are converted into digital signals by A&sol D convertors (5−8). The preceeding stage of adaptive processi...  
WO/2003/019786A2
A digital down converter (100) is provided. The digital down converter (100) includes an input adapted (102) to receive an input signal (101), a mixer circuit (104) coupled to the input to down converter the input signal, and a decimatio...  
WO2002067422A3
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...  
WO2002051003A3
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...  
WO2002056468A3
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/2003/017484A1
A digital signal filter (10) is described for filtering a digital signal made up of a stream of digital words which decomposes each word into a plurality of a tuples, each tuple comprising a plurality of co Each tuple is associated with ...  
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...  
WO/2003/014961A2
An apparatus and method for filtering data that include retrieving a plurality of data samples from memory; computing a locus of the samples; computing a distance between an input value and the locus; comparing the distance between the i...  
WO/2003/015269A2
The invention relates to a method for generating a temporally discrete amplitude value sequence s[n], characterised in that a continuous signal r(t) is filtered and subsequently sampled using a period T. According to the method: - the co...  
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...  
WO2002060056A3
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/2003/015270A2
The invention concerns a method for determining filtering coefficients of a modulated filter bank, based on a prototype filter of length L designed to produce a modulated system with M sub-bands, comprising the following steps: (a) deter...  
WO/2003/009472A1
A fast median filter and method is disclosed. The median filter used by a processor (26) includes a predetermined number of median cells (10-14), each of the median cells is connected to the same input and the same output through a switc...  
WO/2003/009473A1
A FIR in a Gigabit transceiver represents data words in three bits: SIGN representing word sign, SHIFT representing requirement for a shift operation, and ZERO indicating whether the word is zero. An AND gate ANDs a multiplier and the ZE...  
WO/2003/009596A1
An arrangement for the reduction of noise transmitted in the return direction from a local cable TV network (10) comprises an input (14), an output (16), means (21) for evaluating signals incoming at the input (14), and blocking means (1...  
WO/2003/009471A1
There is disclosed software defined forward link finite impulse response (FIR) filter for performing filtering on the forward link of a code division multiple access (CDMA) system, the FIR filter has a number of taps and being characteri...  
WO2002071617A9
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...  
WO2001026224A9
A spread spectrum modulated signal generator is disclosed that reduces the storage requirement for storing values representing filter responses of input signal samples in a digital filter by taking advantage of time-reversal symmetry of ...  
WO2002054350A3
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...  
WO2002041490A3
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...  
WO2002078183A8
A filter (201) accepts a diffusion code sequence or the like as an input sequence at the chip late 1/D. The diffusion code sequences accepted are successively delayed by a delay circuit (202) connected in series, and delivered. Delay tim...  
WO/2003/005356A2
The waveform equalizer (6) for obtaining a corrected signal S' by performing a waveform equalization to a read signal S read out from an information carrier (1). The waveform equalizer (6) has a first filter (61) able to perform a filter...  
WO/2003/001669A1
A decimator is provided that selectively varies the output sampling rate of an integer decimating device, such that the average output sampling rate corresponds to a desired output sampling rate. The output sampling rate varies such that...  
WO/2002/101925A1
A data interpolating device comprises plural stages of delay circuits (1−1, 2−1, 3−1) for delaying discrete data sequentially inputted and multiplication&sol addition circuits (4−1 to 16−1) that performs weighted addition of da...  
WO/2002/101933A1
A compressing device comprises plural stages of delay circuits (1−1 to 4−1) and multiplying&sol adding circuits (5−1 to 10−1) that performs weighted addition of output data from the delay circuits (1−1 to 4−1) according to th...  
WO/2002/097986A2
A hardware-configurable digital filter (100) is adaptable for providing multiple filtering modes. In one embodiment, the digital filter includes a register-based array (112) of logic circuitry, computational circuitry (114) and mode sele...  
WO/2002/095951A1
Harmonic interference occurs in the output signal from noise-shaping filters as a result of limiting cycles and caused by said limiting cycles. According to the invention, a feedback loop (13) is arranged in series after the actual filte...  

Matches 651 - 700 out of 13,158