论文标题
一种新颖的块索引调制方案，用于高机动性OTFS通信
A Novel Block-Wise Index Modulation Scheme for High-Mobility OTFS Communications
论文作者
论文摘要
作为一种有前途的无线通信技术，正交时间频率空间（OTF）已被证明在传统的正交频差（OFDM）方面具有出色的优势。但是，一个具有挑战性的问题是设计有效的系统以进一步提高性能。在本文中，我们为OTFS系统提出了一种新颖的块索引调制（IM）方案，该系统名为Doppler-im具有OTFS（DOIM-OTFS），其中一个多普勒资源箱同时激活了一个多普勒资源箱。对于实际实施，我们为我们提出的DOIM-OTFS方案开发了低复杂性自定义消息传递（CMP）算法。仿真结果表明，我们提出的DOIM-OTFS系统优于没有IM的传统OTFS系统。提出的CMP算法可以实现对不完美的通道状态信息（CSI）的期望性能和鲁棒性。
As a promising technique for high-mobility wireless communications, orthogonal time frequency space (OTFS) has been proved to enjoy excellent advantages with respect to traditional orthogonal frequency division multiplexing (OFDM). However, a challenging problem is to design efficient systems to further improve the performance. In this paper, we propose a novel block-wise index modulation (IM) scheme for OTFS systems, named Doppler-IM with OTFS (DoIM-OTFS), where a block of Doppler resource bins are activated simultaneously. For practical implementation, we develop a low complexity customized message passing (CMP) algorithm for our proposed DoIM-OTFS scheme. Simulation results demonstrate our proposed DoIM-OTFS system outperforms traditional OTFS system without IM. The proposed CMP algorithm can achieve desired performance and robustness to the imperfect channel state information (CSI).
