基于空时自适应处理技术的雷达相位编码的研究

摘要

The radar performance can be improved by radar coding technique. In this paper we analyze the problem of optimizing the phase coded radar to maximize the space-time adaptive processing output. We consider the following constraints: a similarity with a prefixed Barker code, estimation accuracies of both time Doppler frequency and space Doppler frequency, and a robust energy. Although the resulting optimization problem is a non-convex Quadratically Constrained Quadratic Program (QCQP), we propose a fast and efficient algorithm based on the relaxation of the original problem into a semidefinite program (SDP). Numerical simulations suggest that this kind of radar code design achieves a good performance.%为通过雷达编码技术可以使雷达性能得到提高。本文主要研究优化雷达相位编码使得雷达空时自适应处理器的输出信噪比最大的问题。本文考虑以下约束：保证雷达编码与已知巴克码达到一定的相似度、空间和时间多普勒频率估计准确度达到一定的要求，同时考虑到雷达能量的鲁棒性问题。对于上述非凸二次约束优化问题，我们用了快速有效的秩一分解方法。通过仿真实验可以证明，这种相位雷达编码可以使雷达性能提高。