Principles of Pulse Compression
Principles of Pulse Compression
复制标题
脉冲压缩原理
DOI：
10.1109/iret-mil.1961.5008328
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发表时间：
1961
期刊：
影响因子：
--
通讯作者：
E. Wingrove
中科院分区：
文献类型：
--
作者：
H. Ramp;E. Wingrove
为了良好的雷达系统性能，期望发射波形具有1）用于高距离分辨率的宽带宽和2）用于高速度分辨率和高发射能量的长持续时间。在脉冲压缩系统中，传输的是持续时间为T、带宽为F（T和F的乘积大于1）的长脉冲。对接收到的回波进行处理，以获得持续时间为1/F的短脉冲。因此，压缩比（长脉冲持续时间与短脉冲持续时间的比值）是T·F的乘积，是距离和速度分辨率的综合度量。如果具有非线性相位谱的波形通过与该波形"相位匹配“的滤波器，则发生脉冲压缩。相位匹配意味着网络相位响应的非线性部分是波形相位谱的非线性部分的负值。具有矩形幅度谱和抛物线相位谱的波形是理想的脉冲压缩波形。带宽和持续时间可以独立地指定，100或更大的持续时间带宽产品目前是可行的，并且波形在宽范围的多普勒频移上保持与一个滤波器相位匹配。
For good radar system performance, a transmitted waveform is desired that has 1) wide bandwidth for high range resolution and 2) long duration for high velocity resolution and high transmitted energy. In a pulse-compression system, a long pulse of duration T and bandwidth F (product of T and F greater than one) is transmitted. Received echoes are processed to obtain short pulses of duration 1/F. Compression ratio (the ratio of long-pulse duration to short-pulse duration) is thus the product T·F, and is a measure of the combined range and velocity resolution. Pulse compression occurs if a waveform with a nonlinear phase spectrum is passed through a filter ``phase matched'' to the waveform. Phase matched means that the nonlinear part of the network phase response is the negative of the nonlinear part of the waveform phase spectrum. The waveform with rectangular amplitude spectrum and parabolic phase spectrum is ideally suited for pulse compression. Bandwidth and duration can be independently specified, duration-bandwidth products of 100 or more are presently feasible, and the waveform remains phase matched to one filter over a wide range of Doppler frequency shifts.