Adaptive Quantizer for Acoustic Binary Information Transmission.
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
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 Wiener filter which processes them so that a fast Fourier transform Karhunen-Loeve approximation 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 for adaptive bit allocation. An interconnected multiplexer transmits multiplexed signals to the remote monitoring station where the inverse of the foregoing allows an analysis of the acoustic signals being monitored. Author
- Electrical and Electronic Equipment
- Non-Radio Communications