Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (5): 992-998.doi: 10.3969/j.issn.1001-506X.2020.05.04

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Pilot-aided cancellation technology for co-frequency noise interference

Fangmin HE(), Yi LI*(), Jin MENG(), Yang LI()   

  1. National Key Lab of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan 430033, China
  • Received:2019-03-05 Online:2020-04-30 Published:2020-04-30
  • Contact: Yi LI E-mail:hefangminemc@126.com;63450882@qq.com;mengjinemc@163.com;275383996@qq.com
  • Supported by:
    国家自然科学基金(61801501)

Abstract:

The wide-band noise interference generated by the high-power transmitter will cause varing degrees of co-frequency noise interference to the high-sensitivity receiver in the co-site situation. Based on the principle of the adaptive cancellation technology, an effective co-frequency noise cancellation technology is proposed by introducing stable pilot signals with controllable amplitude and frequency at the transmitter. The theoretical model of the pilot-aided cancellation technology for the co-frequency noise interference is established, and the analytical relationship between the interference cancellation ratio of the co-frequency noise and the amplitude and frequency of the pilot is obtained, which can be used to guide the precise control of the pilot amplitude and frequency. The simulations and experiments show that the pilot-aided cancellation technology for the co-frequency noise interference can eliminate the interference of the same frequency noise stably and effectively.

Key words: co-frequency, noise interference, pilot signal, cancellation

CLC Number: 

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