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基于自适应发送波束成形的STB〖JP9〗C-〖JP〗OFDM系统

DOI: 10.13190/jbupt.200504.107.xuk, PP. 107-110

Keywords: 正交频分复用,波束成形,空时分组码

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Abstract:

提出了一种基于信道特性的自适应发送波束成形空时分组码正交频分复用(STB〖JP9〗C-〖JP〗OFDM)系统方案.给出了最大接收信噪比条件下最优发射权值的闭式解和性能仿真结果.该系统能最大限度地利用所有的分集资源并对发射功率进行最优分配.与传统的STB〖JP9〗C-〖JP〗OFDM系统相比,系统性能有明显的提高,而与系统较复杂的空时格码OFDM系统和TC〖JP9〗M-〖JP〗STB〖JP9〗C-〖JP〗OFDM系统相比,在高信噪比条件下能获得较大信噪比增益.讨论了存在信道估计偏差时,自适应发送波束成形STB〖JP9〗C-〖JP〗OFDM系统的性能.

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