Narrowband Interference Mitigation Based on Compressive Sensing for OFDM Systems

Sicong LIU  Fang YANG  Chao ZHANG  Jian SONG  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E98-A   No.3   pp.870-873
Publication Date: 2015/03/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E98.A.870
Type of Manuscript: LETTER
Category: Noise and Vibration
narrowband interference (NBI),  compressive sensing (CS),  repeated training sequences (TS),  

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A narrowband interference (NBI) estimation and mitigation method based on compressive sensing (CS) for communication systems with repeated training sequences is investigated in this letter. The proposed CS-based differential measuring method is performed through the differential operation on the inter-block-interference-free regions of the received adjacent training sequences. The sparse NBI signal can be accurately recovered from a time-domain measurement vector of small size under the CS framework, without requiring channel information or dedicated resources. Theoretical analysis and simulation results show that the proposed method is robust to NBI under multi-path fading channels.