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OFDM技术具有较高的频谱利用率和良好的抗多径衰落性能,目前已在很多领域得到了应用,但它存在的高峰均比问题对系统的性能产生了一定影响。采用优化的模拟退火PTS算法,通过保存中间最优解,控制降温幅度,设置双阈值和链接补充搜索过程,不仅加快了普通模拟退火算法的收敛速度,而且具备良好的搜索精度。仿真结果表明,所提算法既保持较低的计算复杂度,同时具有良好的峰均功率比性能。
OFDM technology has a high spectral efficiency and good anti-multipath fading performance, which has been applied in many fields at present. However, the peak ratio of OFDM has some influences on the performance of the system. By using the optimized simulated annealing PTS algorithm, not only the convergence speed of ordinary simulated annealing algorithm but also the good searching precision are achieved by saving the intermediate optimal solution, controlling the cooling rate, setting dual thresholds and chaining supplementary search process. The simulation results show that the proposed algorithm not only maintains low computational complexity, but also has good peak-to-average power ratio performance.