Error-correcting tandem encoding system

Details Error-correcting tandem encoding system Error-correcting tandem encoding system

1993-12-30

1995-11-07

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375329, 375341, 371 375, 371 43, 370 12, 370 691, H04L 2706

Patent

active

054652677

ABSTRACT:
An error-correcting tandem encoding system includes a transmitter section and a receiver section. The transmitter section comprises a multiplexer for multiplexing data and voice signals supplied thereto, a Reed-Solomon encoder for Reed-Solomon-encoding an output signal from the multiplexer while interleaving the output signal without causing a delay, a convolutional encoder for convolutionally encoding a Reed-Solomon encoded signal from the Reed-Solomon encoder, and a PSK modulator having a fixed bit rate for phase-shift-keying an output signal from the convolutional encoder. The receiver section comprises a PSK demodulator having a fixed bit rate for demodulating a phase-shift-keyed signal supplied thereto, a Viterbi decoder for decoding a demodulated output signal from the PSK demodulator based on a Viterbi algorithm, a deinterleaver for deinterleaving a decoded output signal from the Viterbi decoder, a Reed-Solomon decoder for decoding a deinterleaved output signal from the deinterleaver, a first separator for separating voice and data signals from a decoded output signal from the Reed-Solomon decoder, a second separator for extracting a voice signal from the decoded output signal from the Viterbi decoder, and a selector for selecting the voice signal separated by the first separator or the voice signal extracted by the second separator.

REFERENCES:
patent: 3988677 (1976-10-01), Fletcher et al.
patent: 4757495 (1988-07-01), Decker et al.
patent: 4907233 (1990-03-01), Deutsch et al.
patent: 5117427 (1992-05-01), Miyake et al.
patent: 5259003 (1993-11-01), Berger et al.

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