干擾背景下MIMO雷達(dá)部分相關(guān)信號(hào)設(shè)計(jì)

陳誠(chéng); 李洪濤; 朱曉華; 胡恒; 曾文浩

doi:10.11999/JEIT150637

干擾背景下MIMO雷達(dá)部分相關(guān)信號(hào)設(shè)計(jì)

doi: 10.11999/JEIT150637

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(61401204)，江蘇省科技計(jì)劃支撐類項(xiàng)目(BY2015004-03)，江蘇省博士后基金(1501104C)

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出版歷程
- 收稿日期: 2015-06-01
- 修回日期: 2015-10-30
- 刊出日期: 2016-02-19

Partially Correlation Signal Design for MIMO Radar in the Presence of Interference

Funds:

The National Natural Science Foundation of China (61401204), Key Technology Research and Development Program of Jiangsu Province (BY2015004-03), Postdoctoral Science Foundation of Jiangsu Province (1501104C)

摘要

摘要: 在干擾背景下，集中式MIMO雷達(dá)可以通過(guò)設(shè)計(jì)發(fā)射波形提高系統(tǒng)的輸出信干噪比，然而優(yōu)化后的波形通常會(huì)具有較高的自相關(guān)旁瓣，降低了接收機(jī)對(duì)弱目標(biāo)的檢測(cè)性能。該文提出一種干擾背景下MIMO雷達(dá)部分相關(guān)信號(hào)設(shè)計(jì)方法。該方法在兼顧發(fā)射信號(hào)峰均比(PAPR)的同時(shí)，在發(fā)射天線對(duì)正交恒模波形進(jìn)行加權(quán)處理，并以最大化接收機(jī)系統(tǒng)的輸出信干噪比為準(zhǔn)則建立目標(biāo)函數(shù)，給出一種基于擬牛頓法的連續(xù)優(yōu)化算法求解目標(biāo)函數(shù)，獲得最優(yōu)加權(quán)，使得系統(tǒng)的輸出信干噪比得到提升。仿真結(jié)果表明，該方法能夠有效地抑制干擾，并可自適應(yīng)地將發(fā)射信號(hào)能量輻射向目標(biāo)方向，提高系統(tǒng)輸出信干噪比。
- MIMO雷達(dá) /
- 部分相關(guān)信號(hào)設(shè)計(jì) /
- 干擾抑制 /
- 峰均功率比
Abstract: Transmitted waveform can be designed to improve the SINR performance of colocated MIMO in the preference of interference. However, the optimized waveforms generally have high auto-correlation sidelobes which worsen the detection performance of weak targets at the receiver. To solve this problem, a method of partially correlation signal design for MIMO radar in the presence of interference is proposed in this paper. A set of orthogonal waveforms with constant modulus is weighted at the transmit antenna with the constraint of Peak-to-Average Power Ratios (PAPR), and the objective function is constructed by maximizing the Signal to Interference plus Noise Ratio (SINR) of the receive system. The Sequential Optimization Algorithm based on the Quasi-Newton Method (SOA-QNM) is proposed to find the optimal weights to improve the SINR of the system. Simulation results show that the proposed method can suppress the interference effectively and the emitted power of the transmitted signal can be adaptively concentrated on the direction of the target to improve the SINR performance.
- MIMO radar /
- Partially correlation signal design /
- Interference suppression /
- Peak-to-Average Power Ratios (PAPR)

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