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Design of complementary sequence for OFDM systems with vacant direct current subcarrier

机译：空直流子载波的OFDM系统的互补序列设计

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摘要

Complementary pair has ideal aperiodic auto-correlation property and then may reduce the peak-to-mean envelope power ratio (PMEPR) of orthogonal frequency division multiplexing (OFDM) systems to 3dB. However, for some OFDM systems requiring vacant direct current (DC) subcarrier, the ideal aperiodic auto-correlation property of complementary pair will be damaged, which leads to the increased PMEPR. In this paper, the modified sequences are designed on the basis of zero-inserting operation and combination operation to original complementary pair, respectively. The proposed methods may maintain ideal aperiodic auto-correlation property of original complementary pair even if it is employed in OFDM systems with vacant DC subcarrier. Both theoretical analyses and simulation results show the availability of the presented algorithms, and the expectable PMEPR-3dB property may be obtained.
机译：互补对具有理想的非周期性自相关特性，然后可以将正交频分复用（OFDM）系统的峰均包络功率比（PMEPR）降低至3dB。但是，对于某些需要空闲直流（DC）子载波的OFDM系统，互补对的理想非周期性自相关特性将受到破坏，从而导致PMEPR增大。在本文中，分别在零插入操作和对原始互补对的组合操作的基础上设计了修饰序列。所提出的方法即使在具有空DC副载波的OFDM系统中采用时，也可以保持原始互补对的理想非周期性自相关特性。理论分析和仿真结果均表明了所提算法的有效性，并且可以获得预期的PMEPR-3dB特性。

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