双子脉冲FDA-MIMO雷达接收滤波器与发射频偏联合设计方法

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Abstract：To enhance the anti-interference capability of the frequency diverse array multiple-input and multiple-output （FDA-MIMO）radar system，a joint optimization design method for the FDA-MIMO radar receiver filter-transmision frequency ofset based on the dual sub-pulse mode is proposed. On the basis of the traditional pulse，the dual sub-pulse transmision mode is introduced，and the relevant signal model is established. On this basis，a joint optimization problem for the receiver filter-transmission frequency ofset is formulated with the criterion of maximizing the signal-to-interference-plus-noise ratio（SINR）.To obtain the optimal design scheme of the receiver-transmiter filter，an iterative optimization algorithm is introduced to decompose the optimization problem into two independent sub-problems containing receiver filter optimization and transmission frequency ofset optimization. To further complete the design of the transmission frequency offset，the above problem is transformed into a design problem related to the transmission steering vector. By employing semi-definite relaxation and stochastic methods，and leveraging the mathematical relationship between the transmission steering vector and the frequency offset，the final design of the frequency offset is obtained.Finally，simulation experiments verify the efectiveness of the proposed dual sub-pulse FDA-MIMO radar mode and the joint optimization design method for the receiver filter-transmisson frequency offset in improving the anti-interference capability of the radar system.

Keywords：frequency diverse arry；multiple-input and multiple-output （MIMO） radar； iterative optimization;semi-definite relaxation； frequency offset design

0 引言

面对日益复杂的电磁环境，亟需有效的干扰对抗方式来提高雷达系统探测和抗杂波干扰的能力。（剩余15107字）