Patent application number | Description | Published |
20080201628 | APPARATUS AND METHOD FOR DETERMINING A DETECTED PUNCTURED POSITION IN PUNCTURED CONVOLUTIONAL CODES - An apparatus for generating a detected punctured position in punctured convolutional codes. A delay line circuit has a plurality of delay elements connected in series, storing a finite sequence of an input bit stream. A logic gate circuit, coupled to outputs of a part of the delay elements of the delay line circuit in accordance with a parity check polynomial, performs a logic operation to output a number stream. The number stream is accumulated for possible punctured positions and the one of the possible punctured positions with a minimal accumulated number is selected and determined as the detected punctured position. | 08-21-2008 |
20080222461 | APPARATUS AND METHOD FOR CALCULATING ERROR METRICS IN A DIGITAL COMMUNICATION SYSTEM - A method and an apparatus for calculating an error metric in a digital communication receiver. In the receiver, an input data stream is used to generate at least one input bit stream. The combinational logic unit performs an error-check operation on delayed and current bits of the input bit stream using a polynomial error-check equation previously determined. Finally, an accumulator is used to accumulate a number of trials with respect to the error check operation and generates a nominal error-check number based on the number of the correct trials. | 09-11-2008 |
20080291992 | SYSTEM AND METHOD OF DETECTING BURST NOISE AND MINIMIZING THE EFFECT OF BURST NOISE - A communication system and a method which can reduce the effect of burst noise. The communication system comprises a controllable oscillator, a mixer, a decision circuit, a comparator, a loop filter, and a controller. The controllable oscillator generates an oscillating signal. The mixer coupled to the controllable receives input data and mixes the input data with the oscillating signal. The decision circuit receives the mixed input data and generates an estimated symbol. The comparator generates a decision error between the estimated symbol and the mixed input data. The loop filter coupled to the controllable oscillator filters the decision error, and generates a filtered decision error, and the controllable oscillator generates the oscillating signal according to the filtered decision error. The controller reduces a bandwidth of the loop filter according to the decision error. | 11-27-2008 |
20090006928 | METHOD AND APPARATUS FOR BURST ERROR DETECTION AND DIGITAL COMMUNICATION DEVICE - A digital communication device is provided for decoding a data stream to generate a receiver output. In the digital communication device, a burst error detector determines burst noise locations corresponding to the data stream according to an error-check equation and accordingly generates a burst error indicator. Thereafter, an inner decoder decodes the data stream to generate an inner decoded stream, comprising an erasure marker for performing an erasure marking process on the inner decoded stream based on the burst error indicator to generate an erasure indicator corresponding to the inner decoded stream. An outer decoder then decodes the inner decoded stream with reference to the erasure indicator to generate the receiver output. | 01-01-2009 |
20090115912 | TELEVISION SIGNAL RECEIVER CAPABLE OF CANCELLING LINEAR AND NON-LINEAR DISTORTION - A television signal receiver comprises: a tuner, an optional IF conditioner, an IF distortion canceller, and an IF demodulator. The tuner selects one channel from a radio frequency television signal to generate an intermediate frequency signal. The IF conditioner outputs an IF conditioned signal. The IF distortion canceller cancels a signal distortion in the IF signal or the IF conditioned signal to generate an IF distortion-cancelled signal. The IF demodulator demodulates the IF distortion-cancelled signal to output a baseband signal. | 05-07-2009 |
20090268799 | EQUALIZATION SYSTEM AND METHOD THEREOF - An equalization system used in a communication receiver has multiple equalization stages. A front equalizer supplies equalization output to a feed back filter in a rear equalizer to speed initialization of the rear equalizer. In addition, the rear equalizer supplies decision output to the front equalizer to estimate errors so as to provide more accurate tap coefficient adjustments. Both the front equalizer and the rear equalizer can be implemented with iterative equalizers to further enhance equalization performance. | 10-29-2009 |
20090273714 | DIGITIZED ANALOG TV SIGNAL PROCESSING SYSTEM - A digitized analog television signal processing system is disclosed, comprising an analog-to-digital converter, a demodulation unit, a decoding unit, and a control unit. The analog-to-digital converter samples a television signal comprising a video signal. The demodulation unit demodulates the video signal. The decoding unit decodes the demodulated video signal. The control unit adjusts the demodulation unit according to a signal quality indicator generated during and/or after the decoding of the decoding unit. | 11-05-2009 |
20090296803 | BLOCK-BASED EQUALIZER AND METHOD THEREOF - A block-based equalizer used in a receiver, comprising a feed forward filter, a feed backward filter and a combiner. The feed forward filter generates one first data block for each round and each first data block has multiple first sub-blocks. The feed backward filter generates one second data block. Certain input symbols of the feed backward filter are suppressed during filtering. The combiner combines one second data block and one first sub-block. | 12-03-2009 |
20100097261 | DIGITIZER WITH VARIABLE SAMPLING CLOCK AND METHOD USING THE SAME - A digitizer comprising an analog to digital converter (ADC), a sampling frequency generator, and a controller. The ADC samples an IF signal to generate a digital signal. The sampling frequency generator is coupled to the ADC and provides a sampling clock of variable frequency to the ADC. The controller is coupled to the sampling frequency generator and determines frequency of the sampling clock. | 04-22-2010 |