Enhancing communication performance with DFT-S-OFDM and multi-dimensional index modulation

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

Physical Communication Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI:10.1016/j.phycom.2026.103027

Yongzhi Yu , Hao Li , Ge Li , Limin Guo

引用次数: 0

Abstract

The Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) system provides low Peak Average Power Ratio (PAPR) and low complexity. However, the current mode of subcarrier mapping in the system leads to a waste of subcarriers, thereby reducing the transmission rate. In this paper, a DFT-S-OFDM with Multi-Dimensional Index (DFT-S-OFDM-MDI) modulation system is proposed. The MDI incorporates subcarrier index (SI) and constellation diagram index (CDI), enabling the transmission of bit information in diverse index modes, thereby enhancing the system's transmission efficiency. We have configured six constellation diagram schemes for the system and incorporated spreading matrices to significantly boost the Bit Error Rate (BER) performance. The simulation results indicate that the proposed system is superior to traditional methods in terms of Spectral Efficiency (SE), Energy Efficiency (EE), and Bit Error Rate (BER).

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利用DFT-S-OFDM和多维指数调制技术提高通信性能

离散傅立叶变换扩展正交频分复用（DFT-S-OFDM）系统具有低峰值平均功率比（PAPR）和低复杂度的特点。然而，目前系统中的子载波映射模式导致了子载波的浪费，从而降低了传输速率。本文提出了一种具有多维指数的DFT-S-OFDM （DFT-S-OFDM- mdi）调制系统。MDI结合了子载波索引（SI）和星座图索引（CDI），能够以多种索引方式传输比特信息，从而提高了系统的传输效率。我们为系统配置了六种星座图方案，并加入了扩频矩阵，以显著提高误码率（BER）性能。仿真结果表明，该系统在频谱效率（SE）、能量效率（EE）和误码率（BER）方面都优于传统方法。

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.