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A novel algorithm for frequency de-hopping in radars using agile bandpass sampling for electonic support measurement

journal contribution
posted on 2023-06-10, 01:37 authored by Muhammad Jawad, Muhammad Zeeshan
Modern radars use frequency hopping as an effective anti-jamming technique by changing their frequencies from pulse-to-pulse and thus making their blind estimation a challenging task for Electronic Warfare (EW) receivers. In this paper, a novel frequency de-hopping algorithm is proposed using agile band pass sampling by directly sampling the intercepted RF signal using three selected sampling frequencies. Under-sampling creates image frequencies around the radar carrier at integral multiples of the sampling frequencies. The proposed algorithm exploits this effect by searching for the unique/common frequency among three frequency image vectors using iterative mathematical modeling. It is shown that the proposed algorithm achieves comparably better estimation performance to the already existing single sampling chain heterodyne receivers at advantage of direct RF sampling using low speed ADCs. The achieved estimation performance is closer to CRLB. The effectiveness of frequency resolution and noise tolerance level, selection criteria of sampling frequencies, estimation time complexity of de-hopping and operational SNR range of the proposed algorithm are discussed to elaborate its strengths and limitations in EW applications.

History

Publication status

  • Published

Journal

Telecommunication Systems

ISSN

1018-4864

Publisher

Springer Science and Business Media LLC

Volume

73

Page range

443-454

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2021-11-02

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