A carrier signal bearing digital data which varies a characteristic of the carrier signal during each baud period in a predetermined manner to identify the baud value during the period is demodulated by subdividing each baud period into n intervals, converting the carrier signal characteristic to a DC...http://www.google.de/patents/US4218769?utm_source=gb-gplus-sharePatent US4218769 - Means for subdividing a baud period into multiple integration intervals to enhance digital message detection
