Demodulator for manchester-coded fm signals

Details Demodulator for manchester-coded fm signals Demodulator for manchester-coded fm signals

H - Electricity

03

D

H03D 3/00 (2006.01) H04L 25/49 (2006.01) H04L 27/14 (2006.01) H04L 27/152 (2006.01)

Patent

CA 2139235

Binary signals that are transmitted by Manchester coding and frequency modulation are demodulated based on the behavior of the phase or complex vector value of the received signal. The polarities of the information bits mat be determined by measuring the phase excursions in the middles of the Manchester symbols. A phase reference is established from a plurality of candidate phase references as a basis for comparison of the mid-symbol phase. The phase can be measured at the start-points and end-points of the symbols and averaged, or measured a plurality of times during each symbol period to generate a reference phase.

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