In order to reduce the PAPR, several techniques have been proposed in this thesis, primarily the repeated frequency domain filtering and clipping (RFC) has been proposed and compared with the existing method repeated clipping and frequency domain filtering (RCF). The RFC is better than RCF in performance especially when oversampling (I) ³ 2, although they have the same complexity and cost.
In addition to (RFC) six new types of companding have been proposed and compared with the _-law and A-law compandings. All these proposed methods have better performance than the _-law and A-law compandings, and the best one is Absolute Exponential (AEXP) companding.
Also four new types of hybrids PAPR reduction techniques have been proposed. These methods are: RCF with precodings, RCF with compandings, RFC with compandings, and precodings with compandings. The best improvement is at (RFC with AEXP) because the PAPR, CCDF of PAPR, and BER. and the SNR has not changed.
All methods are simulated using matlab.