线性调频中断连续波的参数选择与综合处理

根据综合脉冲孔径技术的特点,从发射信号的正交性要求和解距离混叠及盲区的角度,分析了线性调频中断连续波信号的脉冲重复频率、阵元载频间隔及调频斜率等波形参数的选取问题。按照该信号的处理流程,推导了接收端发射综合处理的数学过程,并针对发射阵列为均匀线阵的情况,得到了距离-方位二维模糊函数的表达式,简要分析了系统的距离与方位分辨性能。最后给出了实测数据的综合处理结果,讨论了实际处理中需要注意的问题。

Parameters determining and synthesis processing of linear frequency-modulated interruptive-continuous wave

To determine the parameters of LFMICW in accordance with the requirements of SIAR technique and dechirping processing,the pulse repetition frequency,carrier frequency interval and the sweep slope are emphatically analyzed based on the requirements that involve the orthogonality between the transmitting signals,the mitigation of range confusion and blind zones.Synthesis processing is formulated following the processing flow,and then the range-azimuth ambiguity function is achieved in the case of uniform linear array;furthermore,the resolutions on range and azimuth are briefly discussed,respectively.Finally,the synthesis processing results of experimental data are provided and some problems encountered in practical processing are presented as well.