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Abstract

Baud timing is derived from an AC signal having n half-cycles during each baud period, for use in demodulating a carrier signal bearing digital information via some predetermined variation in a characteristic of the carrier signal during each baud period, by converting the carrier signal characteristic variation to a DC signal, sampling the DC signal at the same point during each half-cycle of the AC signal, summing the samples corresponding to the same half-cycle of the AC signal within each sequence of AC signal half-cycles occurring over successive baud periods, there being n such sample totals, identifying the largest one of the n totals and sychronizing the baud timing signal to the AC half-cycle corresponding thereto.

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First Claim