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首页> 外文期刊>Wireless Communications Letters, IEEE >Orthogonal Time Frequency Space (OTFS) With Dual-Mode Index Modulation
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Orthogonal Time Frequency Space (OTFS) With Dual-Mode Index Modulation

机译:双模索引调制的正交时频率空间(OTF)

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摘要

Orthogonal time frequency space (OTFS) modulation has been proved to have better bit error rate (BER) performance over orthogonal frequency division multiplexing (OFDM) under high-mobility conditions. In this letter, a new transmission scheme, called OTFS with dual-mode index modulation (OTFS-DM-IM), is proposed to balance the transmission reliability and spectral efficiency. Moreover, a modified log-likelihood ratio (LLR) detector based on the minimum Hamming distance is designed for demodulation. Then, the theoretical BER analysis of the proposed OTFS-DM-IM is presented. Simulation results highlight the performance advantage of OTFS-DM-IM over classical OTFS and the existing OTFS systems based on index modulation (OTFS-IM), and also confirm the superiority of the modified LLR detector compared to maximum likelihood detector and conventional LLR detector.
机译:在高移动性条件下,已经证明已经证明了正交时间频率空间(OTF)调制在正交频分复用(OFDM)上具有更好的误码率(BER)性能。 在这封信中,提出了一种具有双模索引调制(OTFS-DM-IM)的OTF的新传输方案,以平衡传输可靠性和光谱效率。 此外,设计了基于最小汉明距离的改进的对数似然比(LLR)检测器用于解调。 然后,提出了所提出的OTFS-DM-IM的理论BER分析。 仿真结果突出了OTFS-DM-IM在古典OTF上的性能优势和基于索引调制(OTFS-IM)的现有OTFS系统,并且还与最大似然探测器和传统的LLR检测器相比,确认了改进的LLR检测器的优越性。

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