Data communication system with data rate throttling

Details Data communication system with data rate throttling Data communication system with data rate throttling

1992-01-13

1994-01-18

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

341 61, H04L 2300

Patent

active

052805034

ABSTRACT:
Fractional rate modulation is accomplished by separating incoming data into frames of bits. Each frame in partitioned into bit words of unequal lengths. The words are divided by a modulus to obtain remainders. The remainders are transmitted using, for example, QAM modulation. At the receiving end, the process is reversed. The ratio of baud rate of the system to the incoming bit rate defines the modulus as well as the number of QAM modulation points. A "data rate throttling" technique takes advantage of the capabilities provided by the foregoing to allow the rate at which data is channel mapped and transmitted over a communication channel to be easily varied in small increments.

REFERENCES:
patent: 4941154 (1990-07-01), Wei
patent: 5008902 (1991-04-01), Key et al.
patent: 5103227 (1992-04-01), Betts

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