Reliable and low-complexity wavelet-based spectrum sensing for cognitive radio systems at low SNR regimes

被引：6
|
作者：
Tan, C. K. [1 ]
Lim, W. K. [1 ]
机构：
[1] Multimedia Univ, Fac Engn, Cyberjaya 63100, Selangor, Malaysia
来源：
ELECTRONICS LETTERS | 2012年 / 48卷 / 24期
关键词：
D O I：
10.1049/el.2012.2671
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A low-complexity spectrum sensing technique based on wavelet transform is proposed to improve the sensing reliability at low signal-to-noise ratio (SNR) regimes. In this scheme, the received signal is discretely sampled and decomposed into multi-level detail and approximation coefficients where the distribution of the coefficients is used as the decision metric (DM) to distinguish primary signals from spectrum holes. By using this novel DM, it is shown that the proposed scheme significantly improves the detection performance in terms of complexity and reliability, particularly at low SNR regimes.
引用
收藏
页码：1565 / 1566
页数：2
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