Filtered-OFDM with Index Modulation for Mixed Numerology Transmissions
Filtered-OFDM with Index Modulation for Mixed Numerology Transmissions
复制标题
用于混合数字传输的带索引调制的滤波 OFDM
DOI：
10.1109/icaccs48705.2020.9074243
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
C. K. Ali
中科院分区：
文献类型：
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作者：
Syam Chandran;C. K. Ali
混合数字传输被提出作为一种解决方案，通过为不同的服务分配不同的数字传输来支持下一代无线通信(5G)及以后的不同业务和需求。然而，在频域复用不同的数字符号会破坏多载波系统的正交性，导致符号间干扰(INI)，严重影响系统性能。本文提出了一种结合索引调制的滤波ofdm(f-ofdm)方案，有效地抑制了符号间干扰。在具有索引调制的ofdm中，仅激活一小部分副载波，从而通过副载波和激活的副载波的索引来传送信息。为了利用指数调制在混合命理传输中的分集增益，还对每个命理进行了滤波。仿真结果表明，在混合数字传输场景下，将索引调制与f-ofdm相结合可以显著提高系统的性能。
Mixed numerology transmission is proposed as a solution to support diverse services and requirements for next-generation wireless communication (5G) and beyond by assigning different numerology to different services. However, multiplexing different numerology in the frequency domain will destroy the orthogonality of the multicarrier system resulting in internu-merology interference (INI), which will severely deteriorate the system performance. In this paper, filtered-OFDM (f-OFDM) combined with index modulation is proposed as a solution to effectively mitigate the inter-numerology interference. In OFDM with index modulation, only a fraction of subcarriers is activated, so that information is conveyed through both subcarriers and indices of activated subcarriers. To exploit the diversity gain of index modulation in mixed numerology transmissions, filtering is also done on each numerology. Simulation results show that combining index modulation with f-OFDM can significantly improve the performance of the system in mixed numerology transmission scenarios.