Method for solving radar ambiguity and occlusion based on orthogonal two-phase coded signal

A method for solving radar ambiguity and occlusion based on an orthogonal two-phase coded signal, comprising:

• step 1, determining a maximum code length of two-phase coded signals corresponding to time widths of transmission pulses according to a range blind area and a range resolution of a radar system, and selecting a closest 2N which is less than the maximum code length as a chip length of a single pulse, wherein N is an integer;
• step 2, generating and optimizing an orthogonal two-phase coded signal set by means of a walsh matrix and a genetic algorithm, and alternatively obtaining an orthogonal two-phase coded signal set through an exhaustive method, depending on a code length;
• step 3, determining a pulse time width according to the blind area, and determining a pulse repetition frequency (PRF) according to a highest radial velocity of a target;
• step 4, determining a radar period according to a radar farthest detection range, determining a number m of the transmission pulses in a time corresponding to a farthest detection range according to a pulse repetition interval (PRI) obtained in step 3, and selecting m signals from the orthogonal two-phase coded signal set generated in step 2, to constitute a group of orthogonal two-phase coded pulse signals;
• step 5, and accumulating echoes of transmitted pulse signals, to generate an echo matrix, performing frequency domain pulse compression, to obtain a processed new matrix, and performing moving target detection (MTD) on the matrix.