Suppression method for OFDM signal peak-to-average power ratio based on positive semi-definite programming technique

The invention discloses a suppression method of an OFDM signal peak-to-average power ratio based on a positive semi-definite programming technique, mainly aiming at solving the defect of poor performance of suppressing OFDM system peak-to-average power ratio by the existing method. In the invention, a semi-definite convex optimization model specially designed is solved through setting any one of an OFDM system peak-to-average power ratio threshold, the ratio threshold of free subcarrier power and system total power and error vector amplitude threshold of OFDM signal distortion which meet the requirements of a situation in which the system is located at the transmitting terminal of an OFDM wireless system, and combining original OFDM frequency domain symbols and relevant initial variable quantity, thereby obtaining new OFDM frequency domain symbols, i.e. the expected OFDM frequency domain symbols; and the expected OFDM frequency domain symbols are transmitted out via an antenna after being subject to IFFT, parallel-to-serial change, cyclic prefix adding, D/A conversion and radio frequency amplification. The OFDM domain symbols provided by the invention to the OFDM system can be directly compatible with the existing standard, and effectively inhibits OFDM system peak-to-average power ratio.