Subcarrier pairing for self-heterodyne OFDM
Subcarrier pairing for self-heterodyne OFDM
复制标题
自外差 OFDM 的子载波配对
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
E. Viterbo
中科院分区：
文献类型：
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作者：
Nirmal Fernando;Yi Hong;E. Viterbo
在本文中，我们提出了一个子载波配对计划，以改善整体的自外差（自het）OFDM通信的错误性能。所提出的配对方案利用了自het OFDM子载波之间经历的平均信号干扰噪声比（SINR）不平衡。在发送端，两个简单的操作，符号星座旋转和分量交织，进行配对之前的好和坏的OFDM子载波，和最大似然检测在接收端使用解码的信息。仿真结果表明，在误码率（BER）为10-3的瑞利衰落信道和AWGN信道下，在不增加任何编码开销的情况下，该配对方案可使系统性能分别提高2.5 dB和0.6 dB。此外，我们表明，在相位噪声的存在下，自het OFDM使用建议的配对方案优于传统的OFDM方案与超外差接收机结构。
In this paper, we present a subcarrier pairing scheme to improve the overall error performance of self-heterodyne (self-het) OFDM communications. The proposed pairing scheme exploits the average signal-to-interference-to noise ratios (SINRs) imbalance experienced among self-het OFDM subcarriers. At the transmitter, two simple operations, symbol constellation rotation and component interleaving, are performed before pairing the good and the bad OFDM subcarriers, and maximum likelihood detection is used at the receiver to decode the information. The simulation results show that the proposed pairing scheme improves the system performance by 2.5 dB and 0.6 dB for Rayleigh fading and AWGN channels at bit error rate (BER) of 10-3, respectively, without any coding overhead. In addition, we show that, in the presence of phase noise, self-het OFDM using the proposed pairing scheme outperforms the conventional OFDM schemes with superheterodyne receiver structures.