Radar moving target long-time phase-coherent accumulation detecting method based on RFRAF
A technology of fractional fuzzy and coherent accumulation, applied in radio wave measurement systems, instruments, etc., can solve problems such as compensation performance limitation, reduction of coherent accumulation gain, influence of accumulation gain, etc., to improve SCR/SNR, suppress background noise, etc. wave and noise, increasing the effect of coherent accumulation gain
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[0025] In order to explain the range migration and Doppler migration effects involved in the present invention, the following derivation is first made.
[0026] In order to obtain high resolution and reduce the effective bandwidth, it is assumed that the coherent system radar transmits a linear frequency modulation (Linear Frequency Modulation, LFM) signal
[0027] s t ( t ) = rect ( t T p ) exp { j 2 π [ f c t + 1 2 kt 2 ] }
[0028] In the formula, rect ( u ) = ...
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