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利用空间调制的设备到设备辅助协作中继方案：一种无干扰策略。

Device-to-Device Aided Cooperative Relaying Scheme Exploiting Spatial Modulation: An Interference Free Strategy.

机构信息

Department of Electrical and Electronic Engineering, University of Chittagong, Chittagong 4331, Bangladesh.

Department of Computer Science and Engineering, Sejong University, Seoul 05006, Korea.

出版信息

Sensors (Basel). 2020 Dec 9;20(24):7048. doi: 10.3390/s20247048.

DOI:10.3390/s20247048
PMID:33317023
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7764725/
Abstract

In this paper, a novel interference free dual-hop device-to-device (D2D) aided cooperative relaying strategy (CRS) based on spatial modulation (SM) (termed D2D-CRS-SM) is proposed. In D2D-CRS-SM, two cellular users (e.g., a near user (NU) and a relay-aided far user (FU)) and a pair of D2D transmitter (D1)-receivers (D2) are served in two time-slots. Two different scenarios are investigated considering information reception criteria at the NU. Irrespective of the scenarios, the base station (BS) exploits SM to map information bits into two sets: modulation bits and antenna index, in phase-1. In the first scenario, the BS maps FU information as the modulation bits and NU information as antenna index, whereas modulation bits correspond to NU information and the antenna index carries FU's information in scenario-2. The iterative-maximum ratio combining (-MRC) technique is then used by NU and D1 to de-map their desired information bits. During phase-2, D1 also exploits SM to forward FU's information received from BS and its own information bits to the D2D receiver D2. Then, FU and D2 retrieve their desired information by using -MRC. Due to exploiting SM in both phases, interference free information reception is possible at each receiving node without allocating any fixed transmit power. The performance of D2D-CRS-SM is studied in terms of bit-error rate and spectral efficiency considering -ary phase shift keying and quadrature amplitude modulation. Finally, the efficiency of D2D-CRS-SM is demonstrated via the Monte Carlo simulation.

摘要

本文提出了一种基于空间调制（SM）的新型免干扰双跳设备到设备（D2D）辅助中继策略（CRS）（称为 D2D-CRS-SM）。在 D2D-CRS-SM 中，两个蜂窝用户（例如，近用户（NU）和中继辅助远用户（FU））和一对 D2D 发送器（D1）-接收器（D2）在两个时隙中服务。考虑到 NU 的信息接收标准，研究了两种不同的场景。无论场景如何，基站（BS）都利用 SM 将信息位映射到两组：调制位和天线索引，在阶段-1。在第一种情况下，BS 将 FU 信息映射为调制位，将 NU 信息映射为天线索引，而在第二种情况下，调制位对应于 NU 信息，天线索引携带 FU 的信息。然后，NU 和 D1 使用迭代最大比合并（-MRC）技术对其期望的信息位进行去映射。在阶段-2，D1 还利用 SM 将从 BS 接收的 FU 信息和其自身的信息位转发到 D2D 接收器 D2。然后，FU 和 D2 通过使用-MRC 检索其期望的信息。由于在两个阶段都利用了 SM，因此每个接收节点都可以在不分配任何固定发射功率的情况下实现免干扰信息接收。考虑到二进制相移键控和正交幅度调制，根据误码率和频谱效率对 D2D-CRS-SM 的性能进行了研究。最后，通过蒙特卡罗模拟演示了 D2D-CRS-SM 的效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f263/7764725/7133f14f8530/sensors-20-07048-g022.jpg
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