Signal space diversity: A power- and bandwidth-efficient diversity technique for the Rayleigh fading channel
Signal space diversity: A power- and bandwidth-efficient diversity technique for the Rayleigh fading channel
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DOI：
10.1109/18.681321
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发表时间：
1998-07-01
影响因子：
2.5
通讯作者：
Viterbo, E
中科院分区：
文献类型：
--
作者：
Boutros, J;Viterbo, E
在时间或频率选择性衰落信道上对高数据速率传输的日益增长的需求引起了人们对具有高频谱效率的调制方案（诸如QAM）的关注。为了增加信号集的“分集阶数”，我们考虑多维旋转QAM星座。可以实现非常高的分集阶数，并且这导致在衰落信道上的几乎高斯性能。这种多维调制方案基本上是未编码的，并且使得能够在没有功率或带宽开销的情况下以分集换取系统复杂度。
The increasing need for high data-rate transmissions over time-or frequency-selective fading channels has drawn attention to modulation schemes with high spectral efficiency such as QAM, With the aim of increasing the "diversity order" of the signal set we consider multidimensional rotated QAM constellations. Very high diversity orders can be achieved and this results in an almost Gaussian performance over the fading channel, This multidimensional modulation scheme is essentially uncoded and enables one to trade diversity for system complexity, at no power or bandwidth expense.