基于非單調(diào)遞增頻率偏移的混合相控陣MIMO雷達(dá)目標(biāo)跟蹤方法
doi: 10.11999/JEIT160134 cstr: 32379.14.JEIT160134
基金項目:
國家自然科學(xué)基金(61302153)
Hybrid Phased-MIMO Radar with Non-monotone Increasing Frequency Offset for Target Tracking
Funds:
The National Natural Science Foundation of China (61302153)
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摘要: 現(xiàn)有雷達(dá)系統(tǒng)在目標(biāo)跟蹤時所形成的波束僅與目標(biāo)方向有關(guān)，無法實(shí)現(xiàn)信號發(fā)射能量在特定距離和方向上的聚焦。針對上述問題，該文將頻率分集陣(Frequency Diverse Array, FDA)與MIMO雷達(dá)相結(jié)合，提出一種基于非單調(diào)遞增頻率偏移的混合相控陣MIMO雷達(dá)目標(biāo)跟蹤方法。該方法利用陣元間非單調(diào)遞增頻率偏移，形成基于距離和方向的2維發(fā)射方向圖，不僅消除了一般FDA陣列方向圖在距離上的周期性，而且實(shí)現(xiàn)了方向圖在距離和方向上的解耦合，使雷達(dá)能夠形成基于距離和方向的2維點(diǎn)狀跟蹤波束。通過利用混合相控陣MIMO雷達(dá)的發(fā)射增益和波形分集特性，進(jìn)一步提高目標(biāo)跟蹤性能。利用MUSIC算法對所提方法進(jìn)行實(shí)驗仿真和對比分析，分別驗證了所提方法目標(biāo)跟蹤及抗干擾的有效性。
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關(guān)鍵詞:
- 混合相控陣MIMO雷達(dá) /
- 頻率分集陣 /
- 目標(biāo)跟蹤 /
- 抗干擾
Abstract: The traditional radar system can form an angle-dependent beam for target tracking, which is independent on the range of target and as a result can not make the transmit energy focus on the targets position. For this problem, a novel hybrid phased-MIMO radar with non-monotone increasing frequency offset for target tracking is proposed based on the combination of the Frequency Diverse Array (FDA) with MIMO radar. With the non-monotone increasing frequency offset, this new method can form a transmit beampattern in two dimensions of range and angle, and cancel the periodicity of basic FDA beampattern in range domain as well as decouple the beampattern in range and angle dimensions. With the help of the decoupled beampattern, a two dimensional point beam can be formed to track target. With the advantages of the hybrid phased-MIMO radars transmit gain and waveform diversity, the tracking performance can be enforced. Finally, the target tracking accuracy of the proposed method is analysed and the performance of anti-jamming is proved by simulations results.-
Key words:
- Hybrid phased-MIMO radar /
- Frequency Diverse Array (FDA) /
- Target tracking /
- Anti-jamming
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