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5063573 Method for the equalization of dispersive, linear or approximately linear channels for the transmission of digital signals and arrangement for carrying out the method  
A method for the equalization of dispersive, linear or approximately linear channels for the digital signal transmission by using an adaptive matched filter matched to the entire transmission...
4884229 Method and apparatus for removing noise  
An apparatus and method for removing noise common to correlated real process derived signals. The method comprise the steps of determining the positive time cross correlation function, the negative...
4882668 Adaptive matched filter  
An apparatus provides matched filter output characteristics for known signals embedded in noise signals that have varying noise power distributions. The system correlates applied signals with a...
4875050 Generalized doppler matched binary pulse compressor  
A Doppler matched binary pulse compressor having means to initiate operation, means to generate a Doppler matched filter bank, means to compress the pulses from the Doppler matched filter, either...
4839843 Method and apparatus for correcting a sequence of invalid samples of an equidistantly sampled signal  
Method and apparatus for replacing a sequence of invalid samples of an equidistantly sampled signal, such as an audio signal, with valid signal samples from a remote preceding environment of valid...
4703462 Virtually steerable parametric acoustic array  
The invention concerns an application of linear system parameter estimation techniques to finite amplitude sonar devices, to extract fine grained angular position information about echo sources....
4633426 Method and apparatus for detecting a binary convoluted coded signal  
A method and apparatus are disclosed for detecting, in a plurality of stages of a matched filter, a binary convoluted coded signal having a plurality of code levels ranging from a low level, high...
4627079 Method and apparatus for acquiring and tracking a communications signal  
A receiver is disclosed for acquiring and tracking a data signal in a highly stressed environment. The receiver comprises first and second I.F. sections, a mixer for translation from the first I.F....
4607278 Digital circuit for suppressing changes in a digital signal  
A digital circuit is described for the clocked suppression of changes in a multidigit, positive or negative digital signal which have signs opposite to those of signal changes at previous instants...
4606045 Method and apparatus for detecting an equalizer training period in a receiving-end modem  
Apparatus, and a related method, for fast carrier acquisition in a modem. The apparatus includes circuitry to speed carrier acquisition by the determination of which of two alternate phasors is...
4519084 Matched filter for combating multipath fading  
A carrier and timing recovery technique is disclosed for combating the phase effects of multipath fading occurring during radio transmission. The technique is based on a known mathematical model of...
4493080 Error correcting code decoder  
A method and apparatus which can significantly reduce the matched filter requirements in decoding cyclic block codes, and is particularly advantageous for decoding maximal length block codes, and...
4441194 Triple bit non-coherent matched filter receiving system  
A non-coherent receiving system is provided with a novel triple-bit matched filter detector system which provides two outputs indicative of the data stream being detected. A preliminary or soft...
4418393 Matched filter spread spectrum code recovery apparatus  
Apparatus is provided for decreasing the acquisition time for recovering spread spectrum codes. The transmitted spread spectrum code is preceeded by a sync signal to establish system time at the...
4398274 Within-pulse doppler scanning  
The invention concerns a method and apparatus for detecting Doppler-shifted waveforms in electrical signals. A replica is derived from the waveform prior to Doppler shift and stored in a storage...
4313361 Digital frequency follower for electronic musical instruments  
In an electronic musical instrument apparatus is provided for generating musical sounds having a fundamental frequency which tracks the fundamental frequency of a time varying external control...
4234930 Interleaved binary coded signal translation device  
Apparatus for improved translation of an interleaved binary coded signal heavily masked by noise comprising a plurality of delay line type matched binary code filters for receiving the interleaved...
4044241 Adaptive matched digital filter  
A real time digital filter with its transfer function being matched to a particular signal plus noise condition in a manner that causes the transfer function to adapt to changing signal plus noise...
4025772 Digital convolver matched filter and correlator  
A system for digital signal processing, including a random access memory (RAM) accessed by counters and used for storing and shifting signals in a convolver, correlator, matched filter or...
4011438 Simplified digital moving target indicator filter  
A digital filter for generating a frequency domain output signal in response to an incoming signal arriving in successive receiving cycles whenever the incoming signal has any frequency component...
4006351 Recursive filter implemented as a matched clutter filter  
In a recursive (zeros and poles) filter having input and output signals y and y o and having impulse response h r apparatus and method for obtaining the convolution y o = y * h r using either...
3993956 Digital detection system for differential phase shift keyed signals  
A digital detection system for binary differential phase shift keyed (DPSK) signals includes first and second multipliers to which the signal is applied, and which receive reference signals applied...
3950635 Digital matched filter and correlator using random access memory  
A system for digital signal processing, including a random access memory accessed by counters and used for storing and shifting signals in a time compressor matched filter or correlator.
3521037 APPARATUS AND METHOD OF RECEIVING DISTURBED SIGNALS  
3432754 MATCHED SIGNAL TRANSMITTER-RECEIVER ARRANGEMENT  
3167738 Sequential matched filter  
Matches 51 - 76 out of 76 < 1 2