PAPR Reduction Algorithm Based on Improved m-law Companding Transform and PTS Technology

Abstract

As a new multicarrier modulation system, orthogonal wavelet packet multiplexing (OWPM) system also has the problem of high peak to average power ratio (PAPR). In order to resolve the problem that of high computational complexity and inadequate effect of PAPR suppression for Partial Transmit Sequence (PTS) and high BER for the method of m-law companding transform, an algorithm of PAPR reduction based on improved m-law companding transform and PTS technology is put forward in the paper. Simulation results show that the proposed algorithm compared with the original algorithm has corresponding improvement of performance, and the combined processing with m-law companding transformation and PTS technology, on the condition that not to affect the original bit error rate(BER) of system, can better reduce PAPR, while decrease the computational complexity.

Keywords

• Multicarrier modulation
• orthogonal wavelet packet multiplexing
• peak to average power ratio
• partial transmit sequence
• ?-law companding transform.