BPSK signal blind identification result validity evaluation method based on HOUGH conversion

The invention provides a BPSK signal blind identification result validity evaluation method based on HOUGH conversion. According to the method, on the condition without signal priori knowledge, reference signals are constructed according to signal models corresponding to modulation identification results, a module value curve after correlation accumulation of the reference signals and observation signals is analyzed is converted into a two-dimensional image of binarization, HOUGH conversion is then carried out, straight line detection is carried out, and whether the BPSK signal blind identification results are valid can be judged by detecting the number of aggregation points of the parameter space according to a straight line in the data space. The algorithm can test the validity of the blind identification results of the BPSK signals on the condition of the low signal to noise ratio, and moreover, the priori information of the signals is not needed.