H - Electricity – 04 – L
Patent
H - Electricity
04
L
354/223
H04L 27/233 (2006.01) H04L 27/18 (2006.01)
Patent
CA 1081364
Specification Title of the Invention Differential Detection Systems with Non-redundant Error Correction Abstract of the Disclosure The differential detection system comprises a demodulator for a modulated carrier transmission system for binary signals, in which a symbol detected from the phase difference between the received signal delayed by one signaling interval and the signal received in the present signaling interval is converted into data and a symbol detected from the phase difference between the received signal delayed by two signaling intervals and a signal received in the present signaling interval is converted into parity. The data and the parity are applied to a decoder for a rate 1/2 single error correcting self-orthogonal convolutional code effecting demodulation with non- redundant error correction. The correction system is also applicable to demodulate a carrier wave modulated by m (an integer) level digital data.
287170
Hirade Kenkichi
Samejima Shuichi
Na
Nippon Telegraph And Telephone Public Corporation
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