在IQ不平衡的情况下OFDM信道缩短

2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP) Pub Date : 2014-07-09 DOI:10.1109/ChinaSIP.2014.6889326

Xi Zhang, T. Miyajima

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引用次数: 1

摘要

在正交频分复用系统中，信道缩短是克服延迟波超过循环前缀长度所引起的块间干扰(IBI)的有效方法。在直接转换接收机中，模拟电路中的IQ不平衡会导致严重的性能下降。在本文中，我们讨论了频率无关和频率选择的IQ不平衡对信道缩短方法抑制干扰能力的影响。理论和仿真结果表明，信道缩短方法可以有效抑制IBI，而不影响智商失衡的存在。

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OFDM channel shortening in the presence of IQ imbalance

In orthogonal frequency division multiplexing systems, channel-shortening methods are effective for overcoming inter-block interference (IBI) caused by the delayed waves that exceed cyclic prefix length. In direct-conversion receivers, IQ imbalance in analog circuits causes serious performance degradation. In this paper, we discuss the impact of both frequency-independent and frequency-selective IQ imbalances on the interference suppression capability of a channel shortening method. Both theory and simulations show that the channel shortening method can suppress IBI regardless of the presence of IQ imbalances.

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来源期刊

2014 IEEE China Summit & International Conference on Signal and Information Processing (ChinaSIP)

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