NOMA‐based precoded quadrature spatial modulation in multiuser MIMO downlink transmission over correlated channel

IF 1.7 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC International Journal of Communication Systems Pub Date : 2024-08-02 DOI:10.1002/dac.5931

Shekhar Pratap Singh, Pyari Mohan Pradhan

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引用次数: 0

Abstract

SummaryIn this paper, a non‐orthogonal multiple access (NOMA)‐based precoded quadrature spatial modulation (PQSM) technique (NOMA‐PQSM) has been proposed for the downlink scenario. In NOMA‐PQSM, two intended receiving antennas are activated at any time instant. One antenna is activated for the in‐phase component of the transmitted signal, and another one is activated for the quadrature phase component, on the basis of data bits. NOMA‐PQSM provides benefits like improved spatial diversity and spectral efficiency in comparison with spatial modulation. This work uses zero forcing (ZF) precoding over downlink flat fading Rayleigh multiple input multiple output (MIMO) channels, to limit the channel's deteriorating effect on transmitted signal, assuming perfect channel state information (CSI) at the transmitter. A low complexity receiver based on the successive interference cancellation is used. An expression for the upper bound of average bit error probability is derived. Moreover, the expressions for the sum mutual information of users and its lower bound are also derived. The proposed scheme is compared with the preprocessing aided spatial modulation (PSM)‐based counterpart. Monte Carlo simulations reveal that the NOMA‐PQSM scheme outperforms its orthogonal counterpart and the PSM scheme.

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基于 NOMA 的预编码正交空间调制在相关信道上的多用户 MIMO 下行链路传输中的应用

摘要本文针对下行链路场景提出了一种基于非正交多址（NOMA）的预编码正交空间调制（PQSM）技术（NOMA-PQSM）。在 NOMA-PQSM 中，两个预定接收天线在任何时间瞬间都会被激活。根据数据比特，一个天线为传输信号的同相分量激活，另一个为正交相位分量激活。与空间调制相比，NOMA-PQSM 具有更高的空间分集和频谱效率等优点。这项研究在下行平衰落瑞利多输入多输出（MIMO）信道上使用零强迫（ZF）预编码，以限制信道对传输信号的恶化影响，同时假定发射机具有完美的信道状态信息（CSI）。使用了基于连续干扰消除的低复杂度接收器。推导出了平均比特误差概率的上限表达式。此外，还推导出了用户互信息总和及其下限的表达式。建议的方案与基于预处理辅助空间调制（PSM）的方案进行了比较。蒙特卡罗模拟显示，NOMA-PQSM 方案优于正交方案和 PSM 方案。

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来源期刊

International Journal of Communication Systems 工程技术-电信学

CiteScore

5.90

自引率

9.50%

发文量

323

审稿时长

7.9 months

期刊介绍： The International Journal of Communication Systems provides a forum for R&D, open to researchers from all types of institutions and organisations worldwide, aimed at the increasingly important area of communication technology. The Journal''s emphasis is particularly on the issues impacting behaviour at the system, service and management levels. Published twelve times a year, it provides coverage of advances that have a significant potential to impact the immense technical and commercial opportunities in the communications sector. The International Journal of Communication Systems strives to select a balance of contributions that promotes technical innovation allied to practical relevance across the range of system types and issues. The Journal addresses both public communication systems (Telecommunication, mobile, Internet, and Cable TV) and private systems (Intranets, enterprise networks, LANs, MANs, WANs). The following key areas and issues are regularly covered: -Transmission/Switching/Distribution technologies (ATM, SDH, TCP/IP, routers, DSL, cable modems, VoD, VoIP, WDM, etc.) -System control, network/service management -Network and Internet protocols and standards -Client-server, distributed and Web-based communication systems -Broadband and multimedia systems and applications, with a focus on increased service variety and interactivity -Trials of advanced systems and services; their implementation and evaluation -Novel concepts and improvements in technique; their theoretical basis and performance analysis using measurement/testing, modelling and simulation -Performance evaluation issues and methods.