系统工程与电子技术
繫統工程與電子技術
계통공정여전자기술
Systems Engineering and Electronics
2015年
10期
2272-2278
,共7页
多输入多输出雷达%对抗侦察%参数估计%性能分析
多輸入多輸齣雷達%對抗偵察%參數估計%性能分析
다수입다수출뢰체%대항정찰%삼수고계%성능분석
multiple input and multiple output (MIMO)radar%counter reconnaissance%parameters estima-tion%performance analysis
针对多输入多输出（multiple input and multiple output，MIMO）雷达的侦察对抗问题，基于被动合成阵列技术构建了对 MIMO 雷达方位、辐射频率联合侦察估计的信号模型，通过多次不同速度联合谱估计算法实现了对 MIMO 雷达方位、频率的无模糊估计。此外，推导了多辐射源条件下方位与频率联合侦察估计的克拉美罗界（Cramer-Rao bound，CRB）。频率已知条件下推导了对单部阵列雷达方位侦察估计的 CRB 表达式，并进一步分别给出了对 MIMO 雷达和相控阵雷达进行侦察估计的 CRB 闭解式，对比分析了两种体制下方位侦察估计的性能。理论分析与仿真实验表明：信号频率未知条件下，所提算法能够实现对 MIMO 雷达方位、频率的无模糊估计，侦察估计精度随着信噪比以及不同速度联合估计次数的增大趋近于 CRB；信号频率已知条件下，对单部相控阵雷达和 MIMO 雷达方位侦察估计性能之比仅与相控阵雷达发射波束方向增益以及阵元个数有关。最后，仿真实验结果验证了本文理论分析的正确性和方法的有效性。
針對多輸入多輸齣（multiple input and multiple output，MIMO）雷達的偵察對抗問題，基于被動閤成陣列技術構建瞭對 MIMO 雷達方位、輻射頻率聯閤偵察估計的信號模型，通過多次不同速度聯閤譜估計算法實現瞭對 MIMO 雷達方位、頻率的無模糊估計。此外，推導瞭多輻射源條件下方位與頻率聯閤偵察估計的剋拉美囉界（Cramer-Rao bound，CRB）。頻率已知條件下推導瞭對單部陣列雷達方位偵察估計的 CRB 錶達式，併進一步分彆給齣瞭對 MIMO 雷達和相控陣雷達進行偵察估計的 CRB 閉解式，對比分析瞭兩種體製下方位偵察估計的性能。理論分析與倣真實驗錶明：信號頻率未知條件下，所提算法能夠實現對 MIMO 雷達方位、頻率的無模糊估計，偵察估計精度隨著信譟比以及不同速度聯閤估計次數的增大趨近于 CRB；信號頻率已知條件下，對單部相控陣雷達和 MIMO 雷達方位偵察估計性能之比僅與相控陣雷達髮射波束方嚮增益以及陣元箇數有關。最後，倣真實驗結果驗證瞭本文理論分析的正確性和方法的有效性。
침대다수입다수출（multiple input and multiple output，MIMO）뢰체적정찰대항문제，기우피동합성진렬기술구건료대 MIMO 뢰체방위、복사빈솔연합정찰고계적신호모형，통과다차불동속도연합보고계산법실현료대 MIMO 뢰체방위、빈솔적무모호고계。차외，추도료다복사원조건하방위여빈솔연합정찰고계적극랍미라계（Cramer-Rao bound，CRB）。빈솔이지조건하추도료대단부진렬뢰체방위정찰고계적 CRB 표체식，병진일보분별급출료대 MIMO 뢰체화상공진뢰체진행정찰고계적 CRB 폐해식，대비분석료량충체제하방위정찰고계적성능。이론분석여방진실험표명：신호빈솔미지조건하，소제산법능구실현대 MIMO 뢰체방위、빈솔적무모호고계，정찰고계정도수착신조비이급불동속도연합고계차수적증대추근우 CRB；신호빈솔이지조건하，대단부상공진뢰체화 MIMO 뢰체방위정찰고계성능지비부여상공진뢰체발사파속방향증익이급진원개수유관。최후，방진실험결과험증료본문이론분석적정학성화방법적유효성。
Aiming at the problem of counter reconnaissance for multiple input and multiple output (MIMO) radar,the signal model of joint direction and frequency estimation based on the technique of passive synthetic ar-rays is constructed.The direction and frequency unambiguous estimation is achieved by the spatial spectrum al-gorithm based on the synthetic arrays at different velocities.Furthermore,the Cramer-Rao bound (CRB)of joint estimation for multi radiation sources is derived under unknown frequency and the CRB of direction estima-tion for single array radar is derived under known frequency.Moreover,the closed-form solutions of CRB for di-rection estimation to MIMO radar and phased array radar are respectively derived,and the estimation perform-ance of two types is analyzed and compared.The theoretical analysis and simulation results illustrate that the proposed algorithm can reach direction and frequency unambiguous estimation for MIMO radar and the estima-tion performance can achieve asymptotically CRB with the signal-to-noise and the number of synthetic arrays in-creasing in the presence of frequency unknown;The ratio of direction estimation performance between MIMO radar and phased array radar is only related with transmit beamforming gains of phased array radar and the array number in the presence of frequency known.Lastly,simulation results verify the correctness of the theoretical analysis and the effect of the proposed algorithm.
