NU-SCGRFT-Based Coherent Integration Method for High-Speed Maneuvering Target Detection and Estimation in Bistatic PRI-Agile Radar

Bistatic PRI agile radar has broad application prospects in modern electronic countermeasures because of its good anti-reconnaissance and anti-interference characteristics. It is known that the bistatic PRI-agile radar's detection and estimation performance of high-speed target can be improved by signal integration. However, due to the high speed and maneuvering characteristics of the target, the integration processing is confronted with problems such as RM, DFM, and scale effect, which would lead to a reduction in integration performance. Therefore, we present a coherent integration method named NU-SCGRFT for high-speed maneuvering target detection and estimation with bistatic PRI-agile radar in this article. First, we establish the target's equivalent motion model, which considers both the intrapulse and the interpulse motion of the target, and analyze the characteristic of the received signal and the mismatch effect of the traditional pulse compression. Then, the definition of the NU-SCGRFT method is given, and the processes of intrapulse integration and interpulse integration are derived. Thereafter, the signal processing flow based on the NU-SCGRFT method is given. Finally, through detailed simulation experiments, we compare and analyze the integration, detection, and parameter estimation performance of the proposed algorithm. The result shows that NU-SCGRFT has good integration and parameter estimation performance in bistatic PRI-agile radar system.