Orthogonal frequency division multiplexing (OFDM) is considered among the most suitable multiplexing technique for realizing high speed wireless communication in the present era. Substantially immune to frequency selective fading, high spectral efficiency and superior data rate made OFDM a preferred and popular modulation technique in 3rd generation and 4th generation mobile communication systems. The high value of peak to average power ratio (PAPR) and inter carrier interference (ICI) are the most severe bottleneck for OFDM applications to deliver high performance in communication system. The present work portraits most of conventional and current PAPR reduction techniques through comparative study assisted by simulative analysis which foretells future research potential in wavelet based OFDM to generate more efficient system. PAPR optimization is achieved through hybridization of wavelet with clipping and companding techniques. Different modulation techniques have been analyzed (through Matlab simulation) over proposed hybrid model to observe the PAPR reduction in OFDM system.

正交频分复用（OFDM）被认为是当前时代实现高速无线通信的最合适的复用技术。基本上不受频率选择性衰落的影响，高频谱效率和出色的数据速率使OFDM成为第三代和第四代移动通信系统中的首选和流行的调制技术。峰均功率比（PAPR）和载波间干扰（ICI）的高值是OFDM应用在通信系统中提供高性能的最严重瓶颈。本工作通过模拟研究的对比研究，描绘了大多数常规和当前的PAPR降低技术，预言了基于小波OFDM的未来研究潜力，以产生更高效的系统。通过将小波与削波和压扩技术进行杂交，可以实现PAPR优化。已经通过提出的混合模型分析了不同的调制技术（通过Matlab仿真），以观察OFDM系统中的PAPR降低。