Accession Number : ADD014947

Title :   A High Data Rate Communications System Using Long Pulses.

Descriptive Note : Patent Application, Filed 31 Jan 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Waters, W M ; Linde, G J

Report Date : 31 Jan 1990

Pagination or Media Count : 32

Abstract : A communications system which decreases noise errors and increases information rate without sacrificing bandwidth is formed by a transmitter and a receiver designed to handle long pulse compression waveforms. An encoder connected to the transmitter converts a voice message into digitized voice words, encodes the digitized voice words into time shifted code sequences, and phase modulates the long pulse compression waveform, producing a M-ary coded signal at the output of the transmitter. The receiver is connected to a decoder which includes at least one convolver for computing the correlation of received digitally coded words with independently generated time shifted code sequences, and a controller for generating a plurality of data values according to the largest correlation values, and a transducer responsive to the data values. (Author)

Descriptors :   CODING, COMMUNICATION AND RADIO SYSTEMS, CORRELATION, DATA RATE, DIGITAL SYSTEMS, ERRORS, MESSAGE PROCESSING, NOISE, PULSE COMPRESSION, PULSES, SEQUENCES, TIME, TRANSDUCERS, VALUE, VOICE COMMUNICATIONS, WAVEFORMS, WORDS(LANGUAGE)

Subject Categories : Voice Communications
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE