METHODS AND APPARATUS FOR REDUCING INTELLIGIBLE CROSSTALK IN SINGLE SIDEBAND RADIO SYSTEMS

摘要

METHODS AND APPARATUS FOR REDUCING INTELLIGIBLECROSSTALK IN SINGLE SIDEBAND RADIO SYSTEMSAbstract of the DisclosureIntelligible crosstalk in microwave radio systemsemploying single-sideband modulation is substantiallyelminated by phase-modulating the AM carrier-wave prior toits modulation by the baseband signal. The phase-modulationmay comprise a periodic signal, such as a single sinusoidaltone or pseudo-random noise, or it may comprise an aperiodicsignal such as a truly random noise. In this latter event,the coding signal is transmitted to the receiving locationto ensure proper demodulation of the encoded signal.