Improved SRV wideband anti-jamming algorithm under TDL structure

In order to solve the problem of wideband anti-jamming of navigation signal, the traditional wideband anti-jamming technology usually processes the wideband array signal into several narrowband signals, but the wideband anti-jamming technology can not simply deal with multiple narrow-band anti-jamming technologies. In this paper, a linear constrained minimum variance (LCMV) algorithm based on the improved spatial response deviation (SRV) factor of tapped delay line (TDL) structure is proposed, which is based on space-time joint processing of wideband array signals. The frequency invariance of array response is improved by adding constraints, and the interference signal is suppressed by gradient algorithm based on the criterion of linear constraint minimum variance. Simulation results show that the algorithm can generate deep zeroing in the interference direction, and retain useful signals, good robustness, low output signal-to-noise ratio, and fast convergence speed, compared with the traditional broadband anti-jamming algorithm has obvious advantages.