Hypothesis testing with the identity of high-dimensional covariance matrices for Cognitive Radios

IF 2.2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Physical Communication Pub Date : 2025-09-20 DOI:10.1016/j.phycom.2025.102833

Fatih Yavuz Ilgin

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引用次数: 0

Abstract

Cognitive Radio technologies are the biggest solution to the increasing spectrum scarcity problem. The most significant problem in Cognitive Radio is to find spectrum gaps both quickly and successfully. A new spectrum sensing model is proposed that applies a unit test to the covariance matrix of the received signal by the Primary Users to overcome this problem. Thus, spectrum decisions can be made quickly with the proposed detector and these gaps can be evaluated. Our proposed detector is quite suitable for both low detection speed and low processing costs. It also offers successful results with different antenna combinations. Besides, the test statistic and threshold for the proposed method were obtained theoretically. However, the performance of the this method was tested in a MIMO-OFDM based detection model. According to the obtained simulation results, the proposed method performed better detection performance than the conventional Energy Detection (ED), Maximum–Minimum Eigenvalue (MME) ,Covariance Frobenius Norm CFN-based detector and other detection methods. Finally, it has been observed that the proposed detector has advantages in terms of processing cost and detection time.

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认知无线电的高维协方差矩阵同一性假设检验

认知无线电技术是解决日益严重的频谱短缺问题的最佳方案。认知无线电中最重要的问题是快速成功地发现频谱间隙。为了克服这一问题，提出了一种新的频谱感知模型，对主用户接收信号的协方差矩阵进行单元测试。因此，使用所提出的检测器可以快速做出频谱决策，并且可以评估这些间隙。我们提出的检测器具有低检测速度和低处理成本的特点。它还提供了不同天线组合的成功结果。并从理论上得到了该方法的检验统计量和阈值。然而，在基于MIMO-OFDM的检测模型中测试了该方法的性能。仿真结果表明，该方法比传统的能量检测（ED）、最大最小特征值（MME）、协方差Frobenius Norm cfn等检测方法具有更好的检测性能。最后，我们观察到所提出的检测器在处理成本和检测时间方面具有优势。

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.