The migration compensation methods for DTV based passive radar

Abstract

The compensation methods for range and Doppler migration in digital television (DTV) based passive radar are studied in this paper. Firstly, the problems of the compensation method based on Keystone transform (KT) and Chirp-Fourier transform (CFT) when applied to passive radar are analyzed, and then a comparison is made between this method and the compensation method based on envelope shift and multirate signal processing. The simulation analysis and real data verification imply that both of these methods can achieve effective compensation results. However, in DTV based passive radar, the compensation performance of the latter is distinctly superior to the former.

Sparse Discrete Fractional Fourier Transform and Its Applications

“…As we pointed out prior to (37) and (38), the quadratic and higher terms are neglected. Empirical knowledge and studies in other literatures [41], [42] reveal that the simplified model is sufficient for theoretical discussion and practical applications.…”

“…By adopting the SFrCAF of the same data length, when is rotated to an appropriate angle, the Doppler migration is compensated, which is shown in Figs. 11(e) and (f), while the runtime is dramatically decreased. According to (41), with the optimum rotation angle and the location of the delay/Doppler bin, we can estimate the bistatic acceleration, range and velocity of the target.…”

“…11(e). However, the Keystone transform based solution to this problem has been well established in our previous work [41]. We do not discuss it here for conciseness since it is out of the scope of this paper.…”

Efficient architecture and hardware implementation of coherent integration processor for digital video broadcast‐based passive bistatic radar

“…Third, due to the long‐integration time used in the proposed scheme, the Doppler walk can cause a strong effect on the integration performance. In this case, a chirp‐Fourier or fractional Fourier transform‐based method can be adopted to mitigate the Doppler walk [19, 21, 35].…”

“…the envelope shift (ES) and the keystone transform (KT), are commonly used to compensate for range migration in the PBR. In [19], we showed that both KT and ES methods exhibit similar integration gains when applied in a PBR system.…”