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:

1990-01-31

Pagination or Media Count:

32.0

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