CAJ | 학술논문

提出了一种基于Alamouti空时编码的方位-慢时间波形编码方案。系统沿方位向分两个子孔径按Alam-outi编码矩阵对正交波形作脉间编码发射，接收端全阵列分子孔径接收，通过对回波信号作方位多普勒解模糊，再解码处理Alamouti编码组内相邻两个脉冲重复间隔（PRI ）的回波信号，实现了正交子波形的彻底分离，改善了回波信号的信噪比，可实现高信噪比下高分辨宽测绘带成像。系统结构简单，孔径资源利用率高，且具有同时多模式工作潜力。仿真分析验证了系统信号处理方法的正确性。
제출료일충기우Alamouti공시편마적방위-만시간파형편마방안。계통연방위향분량개자공경안Alam-outi편마구진대정교파형작맥간편마발사，접수단전진렬분자공경접수，통과대회파신호작방위다보륵해모호，재해마처리Alamouti편마조내상린량개맥충중복간격（PRI ）적회파신호，실현료정교자파형적철저분리，개선료회파신호적신조비，가실현고신조비하고분변관측회대성상。계통결구간단，공경자원이용솔고，차구유동시다모식공작잠력。방진분석험증료계통신호처리방법적정학성。
A new mode named azimuth-slow time waveform coding based on Alamouti space-time coding is presented .In azimuth ,the total antenna array is divided into two sub-apertures for transmitting orthogonal waveforms that encoded by Alamouti coding matrix .In receiver ,the total antenna array is divided into multiple sub-apertures forming multiple receive phase centers , which can be used for azimuth doppler ambiguity deduction ,then the decoding of neighbor pulses can separate the orthogonal sub-waveforms thoroughly .This new method can enhance the echoes’ SNR obviously and also realize high resolution wide swath imag-ing .The proposed system is of terseness ,the aperture is fully explored ,the SNR of echoes is improved ,and the potential of multiple working modes simultaneously ,etc .The simulation Results verify the system signal processing method .