Methods and apparatus for reducing intelligible crosstalk in sin

Details Methods and apparatus for reducing intelligible crosstalk in sin Methods and apparatus for reducing intelligible crosstalk in sin

1975-10-24

1977-04-19

Safourek, Benedict V.

325131, H03B 2300, H04B 162

Patent

active

040191400

ABSTRACT:
Intelligible crosstalk in microwave radio systems employing single-sideband modulation is substantially eliminated by phase-modulating the AM carrier-wave prior to its modulation by the baseband signal. The phase-modulation may comprise a periodic signal, such as a single sinusoidal tone or pseudo-random noise, or it may comprise an aperiodic signal such as a truly random noise. In this latter event, the coding signal is transmitted to the receiving location to ensure proper demodulation of the encoded signal.

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Proceedings of the IEEE, May 1973, "Spread Spectrum as a Multiplexing Technique", Breynard and Dobson, pp. 113-120.

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