An Estimation Rotation Factor PTS Scheme with Superimposed Training Sequence for PAPR Reduction in OFDM System
Orthogonal Frequency Division Multiplexing (OFDM) technology is a high-speed information transmission technology with multi-path resistance, one greatest drawback for it is existing high peak power and average power ratio (Peak-to-Average Power Ratio, PAPR). Partial Transmit Sequence (PTS) method is an effective algorithm to reduce PAPR of the OFDM system, and it will not bring about any distortion for the signals. In this paper, we propose a kind of improved PTS scheme which combines superimposed training sequence method on the basis of researching the traditional PTS method of PTS, in which the rotation factor of PTS scheme is using the rotation factor with good performance obtaining from the method of estimating rotation factor. Through simulating the performance of the improved scheme, the results show that: the proposed scheme has good compromise between the PAPR reductions and lowering the computational complexity for the system, at the same time, there is no significant effect on system performance.