Optimized non-unitary linear precoding for orthogonal space-time block codes
Optimized non-unitary linear precoding for orthogonal space-time block codes
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DOI：
10.1109/lcomm.2009.090480
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发表时间：
2009-06
期刊：
影响因子：
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通讯作者：
Haiyang Huang;Gang Wu;Shaoqian Li
中科院分区：
文献类型：
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作者：
Haiyang Huang;Gang Wu;Shaoqian Li
提出了一种新的正交空时分组码非酉线性预编码优化设计方法。根据OSTBC的独特结构，从特征空间的角度分析了其传输潜力。所提出的预编码形式被证明是理论上优化的。与经典的酉格拉斯曼码本设计相比，在对发射信号时均功率限制的意义下，所提出的非酉码本进一步提高了实际系统的整体性能。给出并证明了保证全分集阶数的码本大小约束。我们所提出的设计的优点是在数值模拟中得到验证。
This letter proposes a novel optimized non-unitary linear precoding design for orthogonal space-time block codes (OSTBCs). We dig out the transmission potentials by the analysis from eigen-space point of view according to the unique structure of OSTBCs. The proposed precoding form is proved to be theoretically optimized. Compared with the classical unitary Grassmannian codebook design, in the sense of restriction on the time average power of transmit signal, the proposed non-unitary codebook further improves the overall performance of practical systems. The new constraint on codebook size to guarantee full diversity order is given and proved. The advantages of our proposed design are verified in the numerical simulations.