计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2014年
19期
205-209
,共5页
认知雷达%波形设计%目标检测%相关杂波
認知雷達%波形設計%目標檢測%相關雜波
인지뢰체%파형설계%목표검측%상관잡파
cognitive radar%waveform design%target detection%signal-dependent clutter
研究了基于先验知识的认知雷达自适应检测波形设计问题，推导了发射波形对于检测性能影响的闭式解并提出了一种基于交替投影法的波形优化算法。算法根据所推导出的检测概率与发射波形、接收机滤波器之间关系的闭式表达式，通过联合优化发射波形和接收机滤波器，达到提高接收机的检测概率和降低信号相关杂波负面影响的目的。分析仿真结果可知，所设计波形的检测性能优于传统的恒包络LFM波形。当采用多组初始波形进行迭代优化时，检测概率趋向于相同值，这表明该算法的收敛性良好。
研究瞭基于先驗知識的認知雷達自適應檢測波形設計問題，推導瞭髮射波形對于檢測性能影響的閉式解併提齣瞭一種基于交替投影法的波形優化算法。算法根據所推導齣的檢測概率與髮射波形、接收機濾波器之間關繫的閉式錶達式，通過聯閤優化髮射波形和接收機濾波器，達到提高接收機的檢測概率和降低信號相關雜波負麵影響的目的。分析倣真結果可知，所設計波形的檢測性能優于傳統的恆包絡LFM波形。噹採用多組初始波形進行迭代優化時，檢測概率趨嚮于相同值，這錶明該算法的收斂性良好。
연구료기우선험지식적인지뢰체자괄응검측파형설계문제，추도료발사파형대우검측성능영향적폐식해병제출료일충기우교체투영법적파형우화산법。산법근거소추도출적검측개솔여발사파형、접수궤려파기지간관계적폐식표체식，통과연합우화발사파형화접수궤려파기，체도제고접수궤적검측개솔화강저신호상관잡파부면영향적목적。분석방진결과가지，소설계파형적검측성능우우전통적항포락LFM파형。당채용다조초시파형진행질대우화시，검측개솔추향우상동치，저표명해산법적수렴성량호。
s:In the presence of prior knowledge, the problem of detecting waveform design for cognitive radar is studied. The closed form of the influence of emission waveform on target detection is derived, and the waveform optimization algorithm based on alternating projection method is proposed. In order to improve the detecting performance of cognitive radar and reduce the negative impact of the signal-dependent clutter, the paper optimizes the transmitted waveform and the receiver filter jointly based on the derived closed-form solution of the relationship between the detection probability and the transmitted waveform. The simulation results indicate that the detection performance of the designed waveform is better than that of the constant envelope signal LFM waveform which is used widely in traditional radar. When it uses different initial waveforms to solve the optimization problem, the probability of detection after several iterations will approach the same value, which indicates that the convergence of the algorithm is good.
