Design and Implementation of ΣΔ-3DT Based on Multi-Core DSP

ΣΔbeam space-time adaptive processing (ΣΔ-STAP) is an effective clutter suppression technique for airborne radar. As one kind of ΣΔ-STAP, ΣΔ-3DT has good performance of clutter suppression and detection of slow moving targets. However, because of high demand for training samples and heavy computation load, ΣΔ-3DT faces many challenges in real-time applications. Aiming at these problems, this paper proposes a method on design and implementation of ΣΔ-3DT based on multi-core DSP. This method adopts idea of subsection processing, that is to say, utilizing multi-core characteristic, radar data are divided into several subsections and are distributed to different cores for parallel processing. Moreover, the sample covariance matrix is optimized in the course of processing to decrease computation. Finally, a test based on experimental data is taken to prove the method's feasibility. The results show that this method can reduce computing complexity, shorten processing time, own high practicability, and satisfy the real-time requirements of system.