Spread spectrum modem

Details Spread spectrum modem Spread spectrum modem

1974-05-24

1976-01-20

Libman, George H.

H04B 1500

Patent

active

039342034

ABSTRACT:
Digital data having a rate R and to be transmitted is converted into a K- code, T-seconds long and delayed according to a particular N-bit word, where N=RT, whereby the code carries information in its delayed position in the T frame and not in the code itself. At a receiver station, the correlation function of the received signal is produced and the envelope detected, after which the samples are taken at each of the K possible output times. The largest output selected comprises the information on the delay of the transmitted signal.

REFERENCES:
patent: 3706933 (1972-12-01), Bidell et al.

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