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Outage simulations for digital microwave radio systems with trellis-coded modulation

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3 Author(s)
C. J. Carlisle ; Dept. of Electr. & Electron. Eng., Canterbury Univ., New Zealand ; W. K. Kennedy ; M. Shafi

Recent studies have shown that trellis-coded modulation can achieve coding gains in the residual intersymbol interference environment that exists after adaptive equalization on terrestrial digital microwave radio (DMR) systems. Simulated system signatures for 140 Mb/s DMR systems incorporating trellis-coded 512-QAM modulation are presented and the results compared to the system signatures of equivalent uncoded 256-QAM systems. At a threshold bit-error rate (BER) of 10-3, the signature of the uncoded system can be degraded by the addition of coding. However, at a threshold BER of 10-4, it is found that trellis coding improves the system signature. Conditional probabilities of outage and the percentage of error-free seconds are also calculated for the coded and uncoded systems

Published in:

Communications, 1989. ICC '89, BOSTONICC/89. Conference record. 'World Prosperity Through Communications', IEEE International Conference on

Date of Conference:

11-14 Jun 1989