| According to the radar signal theory, radar' s range precision and resolution is determined by signal' s frequency structure. In order to obtain high range precision and resolution, wide bandwidth waveform signal is used. In order to obtain 0.3m range resolution, LM-××× radar system must used wide band signal' s receiving, generating and processing technology. Wide bandwidth radar signal' s generating and receiving are key problems of ISAR radar.This thesis is focused on the key technologies of wide bandwidth receiver: wide bandwidth waveform signal' s generating, dechirp matching receiving, high speed IF sampling, digital quadrature demodulating, and their performance. |
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