Suppression of narrowband interference using frequency-domain cross-correlation

doi:10.7523/j.issn.2095-6134.2013.05.015

Journal of University of Chinese Academy of Sciences ›› 2013, Vol. 30 ›› Issue (5): 671-675.DOI: 10.7523/j.issn.2095-6134.2013.05.015

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Suppression of narrowband interference using frequency-domain cross-correlation

ZHANG Tao-Tao, ZHANG Wen-Yi

Wireless Information Network Laboratory, Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China

Received:2013-01-08 Revised:2013-03-07 Online:2013-09-15
Contact: 张文逸,E-mail:wenyizha@ustc.edu.cn

Abstract

Abstract:

Narrowband interference (NBI) may lead to failure of the time-domain cross-correlation (TDCC) weak signal detection approach since NBI is mistakenly detected as the desired signal. In order to solve this problem, a detection approach based on frequency-domain cross-correlation (FDCC) is proposed. The entire spectrum band is divided into multiple sub-bands, and the corresponding statistical characteristic of each sub-band is derived. Then according to the criterion of one-sided test, a one-bit decision is made in each sub-band. Finally, the decisions of all the sub-bands are processed jointly via the n-out-of-m fusion rule to make the final decision. Simulation results show that the proposed approach is promising for suppressing NBI and it distinctively outperforms the TDCC detection approach.

Key words: wideband signal detection, cognitive radio (CR), spectrum sensing, cross-correlation, narrowband interference (NBI)

CLC Number:

TN911.23

ZHANG Tao-Tao, ZHANG Wen-Yi. Suppression of narrowband interference using frequency-domain cross-correlation[J]. Journal of University of Chinese Academy of Sciences, 2013, 30(5): 671-675.

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Suppression of narrowband interference using frequency-domain cross-correlation

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