Coded octal phase shift keying in TDMA satellite communications
Abstract
The coded octal phase shift-keying (coded OPSK) signalling technique that has been proposed for TDMA satellite communications is presently subjected to a performance assessment for forward error correction (FEC) codes of different complexities. With the maximum likelihood path decoder, coded OPSK provides a coding gain relative to the performance of uncoded quaternary phase shift keying (QPSK). Significant coding gains of coded OPSK were obtained, relative to uncoded QPSK, for both an AWGN channel and a simulated INTELSAT V channel. Computer simulations have demonstrated that, for an FEC code of 64 states, coded OPSK transmitted over an AWGN channel yields a coding gain of about 3 dB and 4 dB at two different bit error probabilities. Corresponding coding gains for coded OPSK transmitted over the INTELSAT V channel were 3.2 dB and 4.5, at the same two bit error probability values.
- Publication:
-
COMSAT Technical Review
- Pub Date:
- 1983
- Bibcode:
- 1983COMTR..13..221R
- Keywords:
-
- Communication Satellites;
- Error Correcting Codes;
- Phase Shift Keying;
- Signal Encoding;
- Time Division Multiple Access;
- Bit Error Rate;
- Channels (Data Transmission);
- Computerized Simulation;
- Decoding;
- Intelsat Satellites;
- Maximum Likelihood Estimates;
- Signal Detection;
- Communications and Radar