一种降低OFDM系统峰均比的PTS-TR联合算法

提出一种部分传输序列（partial transmit sequence, PTS）算法与载波预留法（tonereservation）相结合的算法来降低OFDM系统峰均功率比（peak-to-average power ratio,PAPR），传统的PTS算法可以在不使信号失真的情况下很好地降低高PAPR出现的概率，但是这种算法的缺点是计算量过大，而TR法虽有不用传递边带信息的优点，但当预留子载波取值小时会得不到理想的性能，取值过大又会浪费系统功率，联合算法在大大地降低了PTS计算量、TR预留载波取值小的同时，还保持了良好的PAPR性能，仿真结果验证了其有效性。

A PTS -TR united algorithm for reducing peak-to-average power ratio of OFDM system

A method that combines partial transmit sequence （PTS） with tone reservation （TR） was proposed for the peak-to-average power ration （PAPR） reduction in OFDM system. Traditional PTS method could reduce the probability of the appearance of OFDM signals with high peak-to-average power ratio without distortion, but the defect of such a method is its high computation. TR needn＇t transmit side-information as an advantage, but when the value of reserved sub-carriers is low, it couldn＇t get good performance. And it is also a waste of system power when the value is high. The proposed method not only reduces the computation of PTS method when the value of reserved sub-carriers is low, but also keeps good performance of reducing PAPR. The simulation verified its efficiency.