Variable-rate variable-power MQAM for fading channels
Variable-rate variable-power MQAM for fading channels
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DOI：
10.1109/vetec.1996.501424
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发表时间：
1996-04
期刊：
影响因子：
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通讯作者：
A. Goldsmith;Soon-Ghee Chua
中科院分区：
文献类型：
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作者：
A. Goldsmith;Soon-Ghee Chua
提出了一种适用于衰落信道下高速数据传输的可变功率和速率自适应MQAM调制方案。我们表明，仅使用五个或六个不同的信号星座实现1-2 dB的最大频谱效率。我们还获得了一个较小的星座集的确切的效率损失。此外，我们比较我们的技术与固定速率的计划，反转的信道衰落。假设完美的功率控制，固定速率方案表现出5-10 dB的损失，频谱效率相对于我们的自适应技术。最后，我们讨论信道测量误差引起的性能下降。
We propose a variable power and rate adaptive MQAM modulation scheme for high-speed data transmission on fading channels. We show that using just five or six different signal constellations achieves within 1-2 dB of the maximum spectral efficiency. We also obtain the exact efficiency loss for a smaller constellation set. In addition, we compare our technique with a fixed-rate scheme which inverts the channel fading. Assuming perfect power control, the fixed-rate scheme exhibits a 5-10 dB loss in spectral efficiency relative to our adaptive technique. We conclude by discussing performance degradation caused by channel measurement errors.