Accession Number:

AD0450689

Title:

THE LINCOLN EXPERIMENTAL TERMINAL SIGNAL PROCESSING SYSTEM,

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

• Drouilhet, P. R., Jr.
• Lebow, I. L.

Report Date:

1964-10-16

Pagination or Media Count:

16.0

Abstract:

The design of the Lincoln Experimental Terminal LET includes a digital signal processing system which is compatible with both dispersive and non-dispersive satellite communications media. It provides three data rates 9600 bits sec, to accommodate a voice-excited vocoder with telephone quality inputs 4800 bitssec, to accommodate a pitch-excited vocoder with dynamic microphone input and 200 bitssec for teletype only. Both of the speech rates allow two multiplexed teletype channels. The basic modulation system combines frequency-hopped signals with sequential encoding and decoding. Antenna pointing, range and Doppler predictions, and data multiplexing and demultiplexing are performed using a Univac 1218 digital computer. Author

Descriptors:

• *RADIO SIGNALS
• DATA PROCESSING
• DATA TRANSMISSION SYSTEMS
• CODING
• SPEECH TRANSMISSION
• VOICE COMMUNICATIONS
• ARTIFICIAL SATELLITES
• MULTIPLEXING
• TELETYPE SYSTEMS
• RADIO JAMMING
• SATELLITE COMMUNICATIONS
• DIGITAL SYSTEMS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE