用于旁瓣抑制的协调互补波形
Coordinating Complementary Waveforms for Sidelobe Suppression
摘要：
本文提出了一种构造雷达发射脉冲序列和接收滤波器的一般方法，使由发射脉冲训练和接收滤波器中使用的脉冲训练的互模糊函数给出的延迟和多普勒雷达点扩展函数在零多普勒轴周围的多普勒间隔内基本上没有距离旁瓣。发送脉冲训练是通过根据二进制序列P中的0和1协调一对格雷互补波形在时间上的传输来构造的。用于对接收信号进行滤波的脉冲训练是以类似的方式构造的，就格雷波形的排序而言，但是脉冲训练中的每个波形由来自另一序列Q的元素加权。我们证明了由P序列和Q序列共同确定的谱控制了互模糊函数的距离旁瓣的大小，通过适当地选择P序列和Q序列，我们可以清除零多普勒轴周围的多普勒间隔内的距离旁瓣。P和Q的联合设计使得能够在用于距离旁瓣抑制的谱零点的阶数和接收机输出处的信噪比之间进行折衷。我们建立这种权衡，并推导出一个必要和充分条件的建设P和Q序列，产生一个空的期望的顺序。
英文摘要：
We present a general method for constructing radar transmit pulse trains and receive filters for which the radar point-spread function in delay and Doppler, given by the cross-ambiguity function of the transmit pulse train and the pulse train used in the receive filter, is essentially free of range sidelobes inside a Doppler interval around the zero-Doppler axis. The transmit pulse train is constructed by coordinating the transmission of a pair of Golay complementary waveforms across time according to zeros and ones in a binary sequence P. The pulse train used to filter the received signal is constructed in a similar way, in terms of sequencing the Golay waveforms, but each waveform in the pulse train is weighted by an element from another sequence Q. We show that a spectrum jointly determined by P and Q sequences controls the size of the range sidelobes of the cross-ambiguity function and by properly choosing P and Q we can clear out the range sidelobes inside a Doppler interval around the zero- Doppler axis. The joint design of P and Q enables a tradeoff between the order of the spectral null for range sidelobe suppression and the signal-to-noise ratio at the receiver output. We establish this trade-off and derive a necessary and sufficient condition for the construction of P and Q sequences that produce a null of a desired order.
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