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7305425 Method and device for digital filtering of interpolated values  
In the digital filtering of an input signal (3), which has been produced by interpolation of a pilot signal (2), under certain circumstances numerous values originating from the past have to be...
7298854 Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing  
Apparatus, methods and articles of manufacture are disclosed for modifying electromagnetic waves by reducing noise in those waves. A transfer function for a plurality of segments is derived...
7292630 Limit-cycle-free FIR/IIR halfband digital filter with shared registers for high-speed sigma-delta A/D and D/A converters  
A multiplexed FIR/IIR digital filter structure (300) which offers linear phase response and low group delay by switching on a FIR filter portion (31) or a IIR filter portion (32). To reduce the...
7290021 Method and apparatus for parallel signal processing  
Disclosed is a method of providing signal processing operations, including convolution/filtering, where each parallel stream is processing signals at a lower rate than the signal data rate itself...
7277479 Reconfigurable fir filter  
A series of digit processing units (DPUs) are connected to form a finite impulse response (FIR) filter. Each DPU includes a register, a multiplexer, and a coefficient multiplier. The register...
7274736 Multiple path equalization for multicarrier systems  
A dual path equalization structure is used to equalize DMT systems operating over channels in which different impairments dominate the performance of different parts of the channel. Two TEQ/DFT...
7262716 Asynchronous sample rate converter and method  
An asynchronous sample rate converter interpolates and filters a digital audio input signal to produce a filtered, up-sampled first signal. A FIFO memory receives the first signal and stores...
7248980 Method and apparatus for removing quantization effects in a quantized signal  
One embodiment of the present invention provides a system that reconstructs a high-resolution signal from a set of low-resolution quantized samples. During operation, the system receives a time...
7236997 Filter processing apparatus and method  
The present invention is applicable to a wavelet transform in JPEG 2000 and makes it possible to implement a convolution operation while reversibility is achieved. To this end, an implementation...
7236550 Method and apparatus for tail cancellation equalization  
Subtraction of a signal 111 from a pulse response 110, where signal 111 provides a good approximation of the tail of pulse response 110, can provide a method for canceling the tail of pulse...
7233967 Reflection filter  
A method and apparatus for generating a reflection filter. The method comprises the steps of determining an averaged step response of an acquired signal and generating a spectrum response from the...
7230982 Decision feedback equalizer for minimum and maximum phase channels  
This invention describes an apparatus and method to improve the performance of a decision feedback equalizer (DFE) for time-varying multi-path channels. For minimum-phase channels, the...
7227902 Method and apparatus for digital channelisation and de-channelisation  
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to its use in wideband...
7213042 Digital IF processing block having finite impulse response (FIR) decimation stages  
A digital Intermediate Frequency (IF) processing block including a decimation filter having Finite Impulse Response (FIR) decimation stages provides improved performance over a Hogenauer...
7209938 Kalman filter with adaptive measurement variance estimator  
A Kalman filtering technique employing an adaptive measurement variance estimator is disclosed. The Kalman filtering technique includes a signal filtering mechanism, the signal filtering mechanism...
7206798 Apparatus and method for programmable dual stage digital filter  
The present invention provides a dual stage digital filter and a method for filtering digital data signals. The dual stage digital filter includes a pre-filter, a main filter, and an output...
7206341 System and method for providing equalization in a multiphase communications receiver  
A circuit and method for receiving digital signals are disclosed. The circuit includes an input connected to a communications channel over which a digital signal is communicated and operates a...
7200194 Receiver signal dynamic range compensation based on received signal strength indicator  
A method for processing a received signal at a mobile receiver of a wireless communications system is disclosed. The method comprises demodulating the received signal to obtain an analog base band...
7191025 Variable digital high and low pass filters  
A system (10) for providing an integer number N of filters. The system comprises an input (Di) for receiving a digital audio signal and an output (Do) for providing a filtered audio signal. The...
7184498 Device and method for the digital demodulation of a signal received by selecting a filter and digital communication receiver comprising same  
The device (10) for digital demodulation comprises a polyphase filter (14) comprising a set of N distinct elementary digital filters and means (16) of selection, for each block of an elementary...
7167513 IQ imbalance correction  
An in-phase and guadrature (IQ) imbalance error-correction method includes estimating, on the basis of a constellation error in a received orthogonal frequency division multiplexing (OFDM) signal,...
7161528 Device and method for the suppression of pulsed wireless signals  
The invention relates to a method of suppressing pulsed signals in particular of DME or TACAN type present in the radio signals received (Ue) by a radio-frequency receiver, characterized in that...
7162506 Integrated circuit with mode control for selecting settled and unsettled output from a filter  
In a signal processing integrated circuit having an analog to digital converter and a digital filter having a plurality of taps separated in time, when starting a conversion after a reset or a...
7154512 System and method for image warping  
A system for generating a target pixel in a target grid from a plurality of source pixels in a source grid, said system comprising, a filter controller for determining a first distance between...
7152082 Audio frequency response processing system  
The invention provides a method and system for forming an output impulse response function. The method includes the steps of creating an initial impulse response, and dividing the impulse response...
7151796 High performance equalizer with enhanced DFE having reduced complexity  
An apparatus and method for implementing an equalizer which (1) combines the benefits of a decision feedback equalizer (DFE) with a maximum-a-posterori (MAP) equalizer (or a maximum likelihood...
7152086 Method and arrangement for sample-rate conversion  
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...
7152083 Jerk limited time delay filter  
The invention includes a method of determining a control input. Such a control input may be used to dictate an input to a system, in order to bring the system from one state to another. In a...
7152081 Methods for efficient filtering of data  
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...
7152084 Parallelized infinite impulse response (IIR) and integrator filters  
A digital parallelized Infinite Impulse Response (IIR) integrator filter comprising a first channel having a first input and second channel having a second input, a first adder to add the two...
7133791 Two-mean level-crossing time interval estimation method  
N-sample level-crossing estimator methods and devices are provided that extract more information from given time samples than the current two-sample approach and that are more resistant to...
7129424 Multi-filter  
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...
7127015 Digital filter for reducing voltage peaks  
The present invention relates to a digital filter suitable for receiving a digital input signal (INPUT(G)) comprising a voltage peak also known as glitch (G). It is characterized in that it...
7120655 Digital filter  
Methods and apparatus of signal processing are described. In a method according to one embodiment, a high-frequency region of a digital signal is detected. In response to the detecting, the...
7117128 Method and apparatus for digital signal filtering  
A Q-Filter is a reconfigurable technique that performs a continuum of linear and nonlinear filtering operations. It is modeled by unique mathematical structure, utilizing a function called the...
7113559 Efficient methods for filtering to avoid inter-symbol interference and processing digital signals having large frequency guard bands  
A circular filtering system that 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...
7109906 NICAM encoder featuring synchronization of a NICAM processor with front-end input and output sections  
A NICAM encoder (54) comprises a NICAM processor (82) and a front-end section (80,84) coupled to the NICAM processor. The front-end section is configured for operating with a system clock (68)...
7107302 Finite impulse response filter algorithm for implementation on digital signal processor having dual execution units  
A computation core includes a computation block, an addressing block and an instruction sequencer, which are coupled to a memory through a memory interface. The computation block includes a...
7099907 Fir filter and ramp-up/-down control circuit using the same  
An n-bit shift register 102 for shifting input data through successive bit stages and AND gates 103-i (i being 1 to n) corresponding to the bit stages of the shift register 102 are provided. A...
7085685 Device and method for filtering electrical signals, in particular acoustic signals  
A device for filtering electrical signals has a number of inputs arranged spatially at a distance from one another and supplying respective pluralities of input signal samples. A number of signal...
7085794 Low power vector summation method and apparatus  
An arrangement is provided for using 2's complement arithmetic without the high switching activity of the prior art. In particular, the invention operates to exploit the sign-extension property of...
7069284 Apparatus and method for correcting signal imbalances using complex multiplication  
A complex multiplier is described for filtering a signal in the frequency domain. In one embodiment, additional, independent frequency coefficients are supplied by the complex multiplier so that...
7062430 Designing boundary filters for a biorthogonal filter bank  
A signal processing device includes a biorthogonal filter bank that processes a finite length signal including a left boundary and a right boundary. The biorthogonal filter bank includes an...
7058126 Digital graphametric equalizer  
A graphametric equalizer has graphic and parametric equalization capabilities within a single non-redundant system. A translation function capability converts user selected inputs for center...
7054500 Video compression and decompression system with postfilter to filter coding artifacts  
A video compression and decompression system has an input to receive an encoded video sequence and an output for a decoded video sequence. A video decoder is coupled to the input and decode the...
7051058 Method and device for filtering a signal  
A method and a device are described for filtering a variable. A first filtering arrangement is used for forming an output variable as a function of an input variable, the first filtering...
7050918 Digital group delay compensator  
A digital group delay compensation system comprising a digital allpass filter that is utilized in an implementation phase; and a system that generates coefficients for the allpass filter used in...
7046854 Signal processing subband coder architecture  
A method, apparatus, and computer program product for combining a subband decomposition and a linear signal processing filter (LSPF). Operations performed include merging the LSPF, via...
7043512 Filter bank approach to adaptive filtering method using independent component analysis  
The present invention relates to a filter bank approach to adaptive filtering method using independent component analysis. More particularly, the invention relates to a method of improving the...
7042935 Equalizer and equalization method  
An equalizer and an equalization method capable of suppressing distortion specific to radio unit and reducing both the oversampling number and the amount of calculations without causing...