Wideband spectrum sensing using step-sampling based on the multi-path nyquist folding receiver

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外文摘要：Wideband spectrum sensing with a high-speed analog-digital converter(ADC)presents a challenge for practical systems.The Nyquist folding receiver(NYFR)is a promising scheme for achieving cost-effective real-time spectrum sensing,which is subject to the complexity of processing the modulated outputs.In this case,a multipath NYFR architecture with a step-sampling rate for the different paths is proposed.The different numbers of digital channels for each path are designed based on the Chinese remainder theorem(CRT).Then,the detectable frequency range is divided into multiple frequency grids,and the Nyquist zone(NZ)of the input can be obtained by sensing these grids.Thus,high-precision parameter estimation is performed by utilizing the NYFR characteristics.Compared with the existing methods,the scheme proposed in this paper overcomes the challenge of NZ estimation,information damage,many computations,low accuracy,and high false alarm probability.Comparative simulation experiments verify the effectiveness of the proposed architecture in this paper.

外文关键词：

Wideband spectrum sensingSub-Nyquist samplingStep-samplingNyquist folding receiver(NYFR)Multisignal processing

作者：

Kai-lun Tian、Kai-li Jiang、Sen Cao、Jian Gao、Ying Xiong、Bin Tang、Xu-ying Zhang、Yan-fei Li

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作者单位：

University of Electronic Science and Technology of China,Chengdu,611731,China

China Electronics Technology Group Corporation 29th Research Institute,Chengdu,610036,China

基金：

Key Projects of the 2022 National Defense Science and Technology Foundation Strengthening Plan 173Equipment Pre-Research Foundation of The State Key Laboratory

项目编号：

2022-173ZD-0106142101200204

出版年：

2024

DOI：

10.1016/j.dt.2022.12.016

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.(1)

参考文献量28