Coherent phase shift keyed demodulator for power line...

Details Coherent phase shift keyed demodulator for power line... Coherent phase shift keyed demodulator for power line...

H - Electricity

04

B

329/11, 340/79,

H04B 3/54 (2006.01) H04L 27/233 (2006.01) H04L 7/033 (2006.01) H04L 7/04 (2006.01)

Patent

CA 1144257

69 48,707 ABSTRACT OF THE DISCLOSURE An apparatus and method for coherent phase demodulation of a binary phase shift keyed carrier in- cludes sequentially processing plus and minus polarity samples of plural carrier segments occurring within each carrier data symbol. The samples for each segment provide a binary coded signal for producing corresponding first and second relative phase angle vector signals. The second vector signals are summed over several data symbols to generate reference phase angle signal vector signals. Correlation signals are produced from phase comparison of each of the first vectors with the reference vector sig- nals. The correlation signals are summed in a synchron- ized relationship for the carrier segments included in each data symbol. The sums of the correlation signals represent either positive or negative correlations with the one and zero data bits of the carrier data symbols.

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