THE LINCOLN EXPERIMENTAL TERMINAL SIGNAL PROCESSING SYSTEM,
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 bits/sec, to accommodate a pitch-excited vocoder with dynamic microphone input; and 200 bits/sec 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 16, 1964
- Accession Number
- AD0450689
Entities
People
- I. L. Lebow
- P. R. Drouilhet Jr.
Organizations
- Massachusetts Institute of Technology