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Design of a Multiorder OFDM Frequency Diversity Approach

机译：多阶OFDM频率分集方法的设计

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摘要

Frequency diversity is used to reduce the effect of destructive fading, so as to improve the communication quality, by passing the information symbols through multiple independently faded paths, and ensure that reliable communication is possible as long as one of these paths is strong. In this paper a multiorder orthogonal frequency division multiplexing (OFDM) frequency diversity approach using properties of order theory and Hamming distance is proposed. The frequency diversity is obtained by specifying proper correlations among the transmitted symbols. As subchannels experience independent fading, at least one of the symbols may have robust signal, which can be used by the receiver to detect other symbols. Considering bit error rate (BER) performance, power consumption, bandwidth utilization, and practical implementation expense, simulation results show that the proposed approach outperforms other OFDM diversity techniques, such as Maximal Ratio Combination (MRC) and Space Frequency Block Coding (SFBC).
机译：频率分集用于通过使信息符号通过多个独立的衰落路径来减少破坏性衰落的影响，从而改善通信质量，并确保只要这些路径之一很强，就可以进行可靠的通信。提出了一种利用阶数理论和汉明距离特性的多阶正交频分复用（OFDM）频率分集方法。通过指定发射符号之间的适当相关性来获得频率分集。当子信道经历独立的衰落时，这些符号中的至少一个可以具有健壮的信号，接收机可以使用该信号来检测其他符号。考虑到误码率（BER）性能，功耗，带宽利用率和实际实现费用，仿真结果表明，该方法优于其他OFDM分集技术，例如最大比率组合（MRC）和空频分组编码（SFBC）。

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