Fast detection and parameter estimation for polyphase-code radar signal

Tian, Rong; Zhou, Rui; Wang, Chunyu

doi:10.1080/00207217.2018.1477196

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…In addition to the CS algorithm, other studies [24,25] have proposed a hierarchical signal detection scheme and a peak slice-based parameter estimation method based on the transformation of the time-frequency rate distribution for polyphase-coded signals. Another study [26] proposed an algorithm based on the combination of fractional autocorrelation and fractional Fourier transform to detect and estimate the parameters of polyphase-coded radar signals. Some of these studies have high precision but require a large amount of computation, and some algorithms have high efficiency, but the accuracy under low SNR is not ideal.…”

Section: Introductionmentioning

confidence: 99%

A fast Wigner Hough transform algorithm for parameter estimation of low probability of intercept radar polyphase coded signals

Yang

Chen

Dong

et al. 2023

IET Signal Processing

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It is difficult for a receiver to intercept the signals from a radar system that can emit low probability of intercept (LPI) polyphase coded signals. The traditional Wigner Hough transform (WHT) algorithm requires a large amount of computation and takes a long time to estimate the parameters of the LPI radar polyphase coded signals. To address this problem, an iterative angle search (IAS) algorithm, which when used in combination with the WHT algorithm significantly reduces the computational cost is proposed. When the signal-to-noise ratio is in the range of −4 to 20 dB, the carrier frequency, number of subcodes, and number of cycles of the carrier frequency per subcode of five polyphase coded signals, namely, Frank, P1, P2, P3, and P4, are accurately estimated in simulation experiments. Based on the selected IAS algorithm parameters, the estimation accuracy of the proposed method is the same as that of the traditional WHT algorithm. However, the operation time is only 5.14% of that of the traditional method. The IAS algorithm has certain application prospects. Experiments indicate that the proposed algorithm provides excellent performance and can rapidly and accurately estimate the parameters of LPI polyphase codes.

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Section: Introductionmentioning

confidence: 99%

A fast Wigner Hough transform algorithm for parameter estimation of low probability of intercept radar polyphase coded signals

Yang

Chen

Dong

et al. 2023

IET Signal Processing

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“…However, there are few studies on estimating parameters of polyphase coded signals directly based on FRFT transform. Most literature adopts other methods such as integrated quadratic phase function (IQPF), WHT, RAT [16][17] to estimate the frequency modulation slope of polyphase coded signals and then derive the optimum order of FRFT transform. This method of parameter estimation is complicated, computationally heavy, and inaccurate.…”

Section: Introductionmentioning

confidence: 99%

Parameter estimation of polyphase coded radar signal based on FRFT

Dong,

Chen,

Sun

et al. 2023

Preprint

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Due to the complex intra-pulse modulation of polyphase code signals, most research on intra-pulse parameter estimation algorithms has focused on utilizing techniques such as the Wigner Hough transform (WHT), Radon Wigner transform (RAT), and other methods. In this paper, we studied the fractional Fourier transform (FRFT) normalized spectrum of polyphase coded signals and derived a mathematical model to prove the impulse characteristic of the polyphase coded spectrum under optimum order. This is the theoretical basis for the fourth-order origin moment as the objective function, and an algorithm based on FRFT is proposed to estimate the intra-pulse parameters of polyphase coded signals. Through simulation experiments, it was shown that the algorithm has a good parameter estimation effect and low computational time, making it suitable for engineering practice. Furthermore, considering the difficulty in obtaining prior information on parameters in non-cooperative environments, which leads to the inapplicability of evaluation standard such as mean square error (MSE), we proposed an evaluation standard for parameter estimation based on a posteriori models. Through simulation experiments, this standard was proven to be as persuasive as MSE.

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“…It was verified by simulation and the results showed that this method had preferable anti-noise performance. In order to detect the polyphase code signals and estimate parameters accurately in low signal-to-noise ratio (SNR), paper [4] developed a method based on WHT. It was achieved by improving the kernel function of WHT and accumulating energy of multiple ridge lines of WVD in polyphase code signals.…”

Section: Introductionmentioning

confidence: 99%

Recognition Method Based on Wigner-Hough Transform for Poly-Phase Code Radar Signal

Zhang¹,

Wang²,

Sun³

2017

IJCNS

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In order to solve the recognition of polyphase code radar signal, this paper gives two methods based on Frank code, i.e. the high-order spectrum recognition method and the fractional Fourier transform (FRFT) method, by analyzing the micro characteristics of polyphase code signals in time and frequency domain respectively. And a recognition algorithm based on Wigner-Hough transform (WHT) is developed in this paper. We verify the validity of each method by computer simulation and give relative merits and demerits. A set of results demonstrate that the algorithm based on Wigner-Hough transform has better recognition performance in low signal-to-noise (SNR) than others.

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Fast detection and parameter estimation for polyphase-code radar signal

Cited by 6 publications

References 19 publications

A fast Wigner Hough transform algorithm for parameter estimation of low probability of intercept radar polyphase coded signals

A fast Wigner Hough transform algorithm for parameter estimation of low probability of intercept radar polyphase coded signals

Parameter estimation of polyphase coded radar signal based on FRFT

Recognition Method Based on Wigner-Hough Transform for Poly-Phase Code Radar Signal

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