An application of trellis coded modulation to digital microwave radio and its performance
説明
The authors describe a modified symbol-rate-increased TCM (trellis coded modulation) for digital microwave radio systems. The symbol-rate-increased TCM accomplishes coding redundancy through bandwidth expansion instead of through signal point expansion, in order to obtain a greater coding gain than the Ungerboeck-type TCM. However, this scheme requires the bandwidth to be expanded by a fixed factor m/(m-1) for a 2/sup m/QAM (quadrature amplitude modulation) system. The proposed scheme allows the bandwidth expansion ratio to be varied to an arbitrary value smaller than m/(m-1). Simulation results have clarified that the proposed scheme achieves a significant improvement over an uncoded scheme. >
収録刊行物
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- Proceedings of ICC '93 - IEEE International Conference on Communications
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Proceedings of ICC '93 - IEEE International Conference on Communications 1 128-132, 2002-12-30
IEEE
