Reference signal reconstruction method applicable to MIMO/OFDM external radiation source radar

The invention discloses a reference signal reconstruction method applicable to MIMO/OFDM external radiation source radar. The reference signal reconstruction method comprises the steps of firstly, achieving frame synchronization, symbol synchronization and frequency synchronization by a leading training sequence in a direct wave signal; secondly, eliminating inter-symbol interference and inter-carrier interference caused by multi-path and Doppler frequency shift by a pilot frequency according to a channel estimation algorithm; thirdly, performing original data recovery by maximum likelihood decoding algorithm, obtaining bit stream with low BER after decoding and correction, and coding clean bit steam again to generate an emission end signal; and finally, analyzing a fuzzy function of the emission end signal, and suppressing a secondary peak and sidelobe of the fuzzy function. Compared with a method of directly acquiring a reference signal, the reference signal reconstruction method hasthe advantages that the