Atomic Norm-Based Joint Delay-Doppler Shift Estimation for OFDM Passive Radar

In this letter, we consider the problem of joint delay-Doppler shift estimation of multiple moving targets in a passive radar system using orthogonal frequency-division multiplexing communication signals. An atomic norm-based algorithm is proposed for better estimation performance and higher robustn...

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Bibliographic Details
Published in:IEEE signal processing letters 2024, Vol.31, p.36-40
Main Authors: Lai, Hongjun, Ye, Kun, Sun, Haixin, Hong, Shaohua
Format: Article
Language:English
Subjects:
Algorithms
Atomic norm
Convexity
Demodulation
Doppler effect
Errors
Estimation
joint delay-Doppler shift estimation
Manganese
Moving targets
OFDM
Orthogonal Frequency Division Multiplexing
Passive radar
Radar equipment
Receivers
semidefinite program
Symbols
Citations: Items that this one cites
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Summary:In this letter, we consider the problem of joint delay-Doppler shift estimation of multiple moving targets in a passive radar system using orthogonal frequency-division multiplexing communication signals. An atomic norm-based algorithm is proposed for better estimation performance and higher robustness against the demodulation error. We utilize a new atomic set with the unknown demodulation error from the direct-path signal included, aiming to reduce the impact of high symbol error rate (SER), in contrast to previous works that introduce \ell _{1}-norm to exploit the sparsity of the afore-mentioned error. By converting to a semidefinite program, the problem is solved under the convex optimization framework. Simulation results show that the proposed method performs better under high SER conditions.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2023.3341391