Adaptive Quantizer for Acoustic Binary Information Transmission.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 11, 1981
- Accession Number
- ADD008652
Entities
People
- James R. Ziedler
- John T. Rickard
- Robert R. Kolesar
Organizations
- United States Department of the Navy