Comparative Study of Peak-to-Average Power Ratio Reduction Techniques for OFDM System

Orthogonal Frequency Division Multiplexing (OFDM) is one well-known scheme, which has recently become a preferred choice for parallel-data-transmission which reduces the influence of multipath fading and avoids the use of complex equalizers. However, an OFDM signal has a large peak-to-average power ratio (PAPR), which can result in significant distortion when transmitted through a nonlinear device, such as a transmitter power amplifier (PA). This paper describes and makes some remark on the selection criteria for selecting the PAPR reduction techniques that are based on signal distortion, probabilistic (scrambling) and coding. Comparison indicates that coding technique is best for PAPR reduction but suffers from bandwidth efficiency as the code rate is reduced. We have also developed Recursive Golay Complementary Codes (RGCC) with low PAPR, high code rate and high information rate.