【摘要】：針對雷達(dá)陣元功率放大器非線性以及在擁擠電磁頻譜環(huán)境下所面臨的頻譜干擾,以雷達(dá)發(fā)射波形峰均比和在干擾頻帶內(nèi)的發(fā)射能量為約束條件,結(jié)合弱目標(biāo)方向估計(jì)不準(zhǔn)的情況,提出一種穩(wěn)健的MIMO雷達(dá)發(fā)射波形和接收濾波器聯(lián)合優(yōu)化方法.通過半正定松弛、Charnes-Cooper轉(zhuǎn)換、序列優(yōu)化和Max-min優(yōu)化理論,將目標(biāo)方向不確定集內(nèi)非凸的優(yōu)化問題轉(zhuǎn)化為關(guān)于發(fā)射波形和接收濾波器的子凸優(yōu)化問題進(jìn)行求解;最后通過隨機(jī)向量合成得到最終發(fā)射波形和接收濾波器.該方法在提高算法穩(wěn)健性的同時(shí),使每個(gè)陣元發(fā)射波形滿足特定峰均比并且在干擾頻帶內(nèi)形成零陷,從而提高M(jìn)IMO雷達(dá)在實(shí)際應(yīng)用環(huán)境下的工作性能,仿真實(shí)驗(yàn)驗(yàn)證了該方法的有效性.
[Abstract]:In view of the nonlinearity of the power amplifier of radar array elements and the spectral interference in the crowded electromagnetic spectrum environment, the peak to average ratio of the radar emission waveform and the emission energy in the interference band are taken as the constraint conditions. A robust joint optimization method for transmitting waveform and receiving filter of MIMO radar is proposed. By means of the positive semidefinite relaxation Charnes-Cooper transformation, sequence optimization and Max-min optimization theory, the non-convex optimization problem in the target direction uncertainty set is transformed into a subconvex optimization problem about the transmitting waveform and the receiving filter. Finally, the final transmitting waveform and receiving filter are obtained by random vector synthesis. This method not only improves the robustness of the algorithm, but also makes each array element transmit waveform meet the specific peak to average ratio and form zero trapping in the jamming band, thus improving the performance of MIMO radar in the practical application environment. Simulation results show that the proposed method is effective.
【作者單位】： 空軍工程大學(xué)信息與導(dǎo)航學(xué)院;空軍大連通信士官學(xué)校有線通信系;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(61302153) 航空科學(xué)基金資助項(xiàng)目(20160196001)
【分類號】：TN958

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