Systematic design of unitary space-time constellations
Systematic design of unitary space-time constellations
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DOI：
10.1109/18.868472
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发表时间：
2000-09-01
影响因子：
2.5
通讯作者：
Urbanke, R
中科院分区：
文献类型：
--
作者：
Hochwald, BM;Marzetta, TL;Urbanke, R
针对多天线通信链路，提出了一种生成酉空时信号星座的系统方法。当瑞利衰落信道中，发射机和接收机都不知道衰落系数时，可以通过利用多天线分集来实现低误码率的酉空时信号。由于衰落系数未知，创建和评估星座的标准是非标准的，并且与常见的最大欧几里德距离正态分布有显著不同。我们的构造从星座中的第一个信号开始-列是正交化的长方形复值矩阵-并通过在高维复空间中连续旋转该信号来系统地产生剩余信号。这种结构很容易产生高维信号的大型星座。我们通过一个、两个和三个发射机天线的例子来演示它的有效性。
We propose a systematic method for creating constellations of unitary space-time signals for multiple-antenna communication links. Unitary space-time signals, which are orthonormal in time across the antennas, have been shown to be well-tailored to a Rayleigh fading channel where neither the transmitter nor the receiver knows the fading coefficients, The signals can achieve low probability of error by exploiting multiple-antenna diversity. Because the fading coefficients are not known, the criterion for creating and evaluating the constellation is nonstandard and differs markedly from the familiar maximum-Euclidean-distance norm.Our construction begins with the first signal in the constellation-an oblong complex-valued matrix whose columns are orthonormal-and systematically produces the remaining signals by successively rotating this signal in a high-dimensional complex space. This construction easily produces large constellations of high-dimensional signals. We demonstrate its efficacy through examples involving one, two, and three transmitter antennas.