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Description: Today's radar is based on multi-pulse observation
Measurement of multiple pulse accumulation can effectively improve the SNR
And improve the detection capability of the radar. Accumulation processing can be in envelope detection
Prior to completion, called detection preamble or intermediate frequency accumulation. Signal in the
The frequency accumulation requires a strict phase relationship between signals, that is to say
The signal is phase-coherent, so it is also known as phase-coherent accumulation. In addition, accumulation
The process can be completed after the envelope detection, known as detection and accumulation or
Video accumulation. The phase information was lost because of the signal in envelope detection
And only the amplitude information is kept, so the accumulation of the detection after detection is not needed
There is a strict phase relationship between signals, so this accumulation is called
Noncoherent accumulation. There are many ways to achieve noncoherent accumulation, for example
Collect the delay line accumulation (FIR accumulation) and feedback accumulator.
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