Designing Interference-Immune Doppler-Tolerant Waveforms for Radar Systems

Chirplike sequences; Doppler tolerance; frequency-modulated continuous wave (FMCW); interference; phase-modulated continuous wave (PMCW); Chirp-like sequences; Code; Doppler tolerances; FMCW; Interference; Minimisation; PMCW; Polyphase sequences; Waveforms; Aerospace Engineering; Electrical and Electronic Engineering

Abstract :

[en] Dynamic target detection using linear frequency modulation (LFM) waveform is challenging in the presence of interference for different radar applications. Degradation in the signal-to-noise ratio is irreparable, and interference is difficult to mitigate in time and frequency domains. In this article, a waveform design problem is addressed using the majorization-minimization framework by considering peak sidelobe level (PSL)/integrated sidelobe level (ISL) cost functions, resulting in a code sequence with Doppler-tolerant characteristics of an LFM waveform and interference-immune characteristics of a tailored polyphase sequence (unique phase code + minimal ISL/PSL). The optimal design sequences possess polynomial phase behavior of degree Q among its subsequences and obtain optimal ISL and PSL solutions with guaranteed convergence. By tuning the optimization parameters such as degree Q of the polynomial phase behavior, subsequence length M, and the total number of subsequences L, the optimized sequences can be as Doppler tolerant as LFM waveform in one end, and they can possess small cross-correlation values similar to random-phase sequences in polyphase sequence on the other end. The numerical results indicate that the proposed method is capable to computationally design chirplike sequences, which, prior to this work, were obtained by mimicking phase variations of LFM waveform. An application of the proposed method for the automotive scenario is also illustrated in the numerical results.

Disciplines :

Computer science

Author, co-author :

AMAR, Robin ; University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SPARC

Alaee-Kerahroodi, Mohammad ; University of Luxembourg, Interdisciplinary Centre for Security, Reliability and Trust, Luxembourg City, Luxembourg

Bhavani Shankar, M.R. ; University of Luxembourg, Interdisciplinary Centre for Security, Reliability and Trust, Luxembourg City, Luxembourg

External co-authors :

yes

Language :

English

Title :

Designing Interference-Immune Doppler-Tolerant Waveforms for Radar Systems

Publication date :

June 2023

Journal title :

IEEE Transactions on Aerospace and Electronic Systems

ISSN :

0018-9251

eISSN :

1557-9603

Publisher :

Institute of Electrical and Electronics Engineers Inc.

Volume :

Issue :

Pages :

2402 - 2421

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://xplorestaging.ieee.org/ielx7/7/10146528/09928573.pdf?arnumber=9928573

Funders :

Luxembourg National Research Fund

Funding text :

This work was supported by the Luxembourg National Research Fund through the CORE project "SPRINGER: Signal Processing for Next Generation Radar" under Grant C18/IS/12734677/SPRINGER.

Data Set :

https://ieeexplore.ieee.org/document/9928573

Available on ORBilu :

since 22 November 2023

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