Accession Number : ADD008652

Title :   Adaptive Quantizer for Acoustic Binary Information Transmission.

Descriptive Note : Patent Application,


Personal Author(s) : Kolesar,Robert R ; Rickard,John T ; Ziedler,James R

Report Date : 11 May 1981

Pagination or Media Count : 13

Abstract : An apparatus and technique reduces the data transmission rate required to transmit acoustic signals from undersea sensors to remote monitoring locations without degrading the surveillance information content of the signals. The signals are digitized and fed to an adaptive line enhancer which processes them so that a fast Fourier transform coefficient generator can feed representative signals to a programmable quantizer and a signal averager. When significant shifts are detected in the fast Fourier transform coefficient variances, responsive signals are generated by the programmable quantizer. An interconnected multiplexer transmits the multiplexed signals to the remote monitoring station where the inverse of the foregoing allows an analysis of the acoustic signals being monitored. (Author)

Descriptors :   *Patent applications, *Analog to digital converters, *Quantization, *Acoustic communications, Data rate, Fast fourier transforms, Acoustic signals, Undersea surveillance, Data compression, Correlation techniques, Electric filters, Multiplexing

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE