Research on Peak to Average Power Ratio Suppression Method of Orthogonal Frequency Division Multiplexing Signal Based on Improved Tone Reservation Algorithm
Research on Peak to Average Power Ratio Suppression Method of Orthogonal Frequency Division Multiplexing Signal Based on Improved Tone Reservation Algorithm
Due to the very strict requirements of the system for linear components, the current Orthogonal Frequency Division Multiplexing(OFDM) system has the problem of high Peak to Average Power Ratio (PAPR), which causes signal distortion of OFDM and OFDM-based radar integrated system, and affects the system performance. To solve this problem, a Tone Reservation(TR) method based on the weighted least squares method is proposed in this paper. Firstly, the subcarriers in the OFDM design scheme are divided into data subcarriers and reserved blank subcarriers, data subcarriers modulate data subcarriers, and blank subcarriers modulate blank data. Then, the original data is used to obtain the best peak clipping coefficient and peak clipping data through the weighted least squares method, and the peak clipping data is modulated on the blank subcarrier. Finally, the peak shaving data is superimposed on the original data to complete the suppression of PAPR. Simulation results show that the TR algorithm based on weighted least squares method can achieve good PAPR suppression effect in 1 to 3 iterations, and its convergence speed is significantly improved compared with the traditional algorithm.
关键词
正交频分复用/峰值平均功率比/子载波预留法
Key words
Orthogonal Frequency Division Multiplexing(OFDM)/Peak to Average Power Ratio (PAPR)/Tone Reservation (TR)
维普
万方数据