BER optimized channel independent precoder for OFDM system

BER optimized channel independent precoder for OFDM system
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用于 OFDM 系统的 BER 优化信道独立预编码器

DOI:
10.1109/glocom.2002.1188099
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发表时间:
2002
期刊:
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
影响因子:
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通讯作者:
See
See
中科院分区:
--
文献类型:
--
作者:
Yuan;See

文献摘要

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本文研究了正交预编码OFDM系统的误码率最小化问题。对于低信噪比,我们表明,传统的OFDM系统是最佳的解决方案和最佳的预编码器是单位矩阵。对于高SNR,对应于相对实际的BER范围,存在用于最佳预编码器的信道独立解决方案。一种这样的解决方案是DFT矩阵,并且所得到的最佳收发器成为单载波传输系统。此外,在这种情况下,传统的OFDM系统在所有具有正交预编码器的OFDM系统中具有最大的BER。
We consider the minimization of bit error rate (BER) for OFDM systems with orthogonal precoders. For low SNR, we show that the conventional OFDM system is the optimal solution and the optimal precoder is the identity matrix. For high SNR, corresponding to a relatively practical range of BER, there are channel independent solutions for optimal precoders. One such solution is the DFT matrix and the resulting optimal transceiver becomes the single carrier transmission system. Furthermore, in this case the conventional OFDM system has the largest BER among all OFDM systems with orthogonal precoders.