The detection method for UE-Codebook Mismatch in grant-free SCMA IoT systems

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

Physical Communication Pub Date : 2026-03-01 Epub Date: 2026-01-28 DOI:10.1016/j.phycom.2026.103026

Hua He, Yanxia Liang, Qiong Zhao

引用次数: 0

Abstract

A detection algorithm for sparse code multiple access receivers in granted-free Internet of Things is proposed to address the detection problem under the condition of unknown UE-codebook matching at the base station. This problem entails a three-dimensional matching process involving UEs, codebooks, and codewords. The proposed algorithm treats each frequency resource block as an independent decoding layer and performs layer-wise decoding. To ensure both low computational complexity and high accuracy, the algorithm incorporates dynamic UE classification and a dual-threshold strategy. Simulation results demonstrate that, with the threshold being properly set, the computational complexity of the first decoding layer is reduced by up to 98.26%, and that of the second decoding layer by up to 96.8%. In addition, the computational complexity decreases progressively across decoding layers, achieving continuous layer-wise complexity reduction without requiring decoding on all available frequency resource blocks.

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无授权SCMA物联网系统中ue -码本不匹配检测方法

提出了一种免费物联网中稀疏码多址接收机检测算法，解决了基站ue码本匹配未知情况下的检测问题。这个问题需要涉及ue、码本和码字的三维匹配过程。该算法将每个频率资源块视为一个独立的解码层，进行逐层解码。为了保证较低的计算复杂度和较高的准确率，该算法结合了动态UE分类和双阈值策略。仿真结果表明，在适当设置阈值的情况下，第一解码层的计算复杂度可降低98.26%，第二解码层的计算复杂度可降低96.8%。此外，计算复杂度在解码层之间逐渐降低，在不需要对所有可用的频率资源块进行解码的情况下实现逐层复杂度的连续降低。

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.