H - Electricity – 04 – L
Patent
H - Electricity
04
L
354/226
H04L 27/18 (2006.01)
Patent
CA 1106067
Abstract of the Disclosure According to the disclosure, an apparatus for the automatic detection and correction of errors and suited for differential phase-shift- keying (DPSK) data transmission systems comprising an encoder unit which includes a differential encoder, an error correcting encoder, a differential decoder and a decoder including a differential encoder, an error correcting decoder and a differential decoder. Disposed between the encoder and decoder units is a transmission medium including a differentially encoder phase-shift- keying modulator unit and a differentially encoded phase-shift-keying demodulator unit. To data encoded by the differential encoder included within the encoder unit is added a check digit sequence by the error correcting encoder. The said encoded data with sequence added is then differentially decoded by the differential decoder and transmitted via the transmitting medium. The data sequence received by the decoder unit is encoded by the included differential decoder. Error digits contained in the said encoded data sequence are corrected by the error correcting decoder, and the resultant output data sequence is differentially decoded by the said differential decoder.
307623
Nippon Electric Co. Ltd.
Smart & Biggar
LandOfFree
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