Adaptive transmit antenna grouping scheme for signed quadrature spatial modulation

IF 1.9 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Physical Communication Pub Date : 2026-03-01 Epub Date: 2026-02-20 DOI:10.1016/j.phycom.2026.103049

Yu Guan , Lexi Xu , Yuyang Peng , Enjian Bai , Xue Qin Jiang , Han Hai

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Abstract

Recently, signed quadrature spatial modulation (SQSM) has been proposed to improve the spectral efficiency (SE) for spatial modulation systems. SQSM extends the real and imaginary dimensions along with their inverse counterparts to transmit more bits. However, the number of transmit antennas of SQSM is limited to a power of 2. In this paper, a novel transmit antenna grouping scheme for SQSM (AG-SQSM) and an adaptive version for AG-SQSM (AAG-SQSM) are proposed. The AG-SQSM scheme makes full use of space resources, breaking through the limitation of SQSM. The SE of AG-SQSM is higher than that of traditional modulations when the number of transmit antennas increases linearly. Moreover, AAG-SQSM improves the bit error rate (BER) of the system by adopting an adaptive algorithm. The BER upper bounds of AG-SQSM and AAG-SQSM over Rayleigh fading channels are analyzed. Simulation results reveal that AG-SQSM and AAG-SQSM both have better BER performance than conventional SQSM when using the maximum likelihood (ML) detection algorithm.

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符号正交空间调制的自适应发射天线分组方案

近年来，为了提高空间调制系统的频谱效率，提出了符号正交空间调制（SQSM）。SQSM扩展实维和虚维以及它们的逆维来传输更多的比特。然而，SQSM的发射天线数量被限制为2的幂。本文提出了一种新的面向SQSM的发射天线分组方案（AG-SQSM）和一种面向AG-SQSM的自适应方案（AAG-SQSM）。AG-SQSM方案充分利用了空间资源，突破了SQSM的局限性。当发射天线数量线性增加时，AG-SQSM的SE高于传统调制。此外，AAG-SQSM采用自适应算法提高了系统的误码率。分析了AG-SQSM和AAG-SQSM在瑞利衰落信道下的误码率上界。仿真结果表明，当使用最大似然（ML）检测算法时，AG-SQSM和AAG-SQSM都比传统SQSM具有更好的误码率性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Communication ENGINEERING, ELECTRICAL & ELECTRONICTELECO-TELECOMMUNICATIONS

CiteScore

5.00

自引率

9.10%

发文量

212

审稿时长

55 days

期刊介绍： PHYCOM: Physical Communication is an international and archival journal providing complete coverage of all topics of interest to those involved in all aspects of physical layer communications. Theoretical research contributions presenting new techniques, concepts or analyses, applied contributions reporting on experiences and experiments, and tutorials are published. Topics of interest include but are not limited to: Physical layer issues of Wireless Local Area Networks, WiMAX, Wireless Mesh Networks, Sensor and Ad Hoc Networks, PCS Systems; Radio access protocols and algorithms for the physical layer; Spread Spectrum Communications; Channel Modeling; Detection and Estimation; Modulation and Coding; Multiplexing and Carrier Techniques; Broadband Wireless Communications; Wireless Personal Communications; Multi-user Detection; Signal Separation and Interference rejection: Multimedia Communications over Wireless; DSP Applications to Wireless Systems; Experimental and Prototype Results; Multiple Access Techniques; Space-time Processing; Synchronization Techniques; Error Control Techniques; Cryptography; Software Radios; Tracking; Resource Allocation and Inference Management; Multi-rate and Multi-carrier Communications; Cross layer Design and Optimization; Propagation and Channel Characterization; OFDM Systems; MIMO Systems; Ultra-Wideband Communications; Cognitive Radio System Architectures; Platforms and Hardware Implementations for the Support of Cognitive, Radio Systems; Cognitive Radio Resource Management and Dynamic Spectrum Sharing.