This book addresses the challenges in wireless communication, particularly focusing on the high Peak-to-Average Power Ratio (PAPR) in MIMO-OFDM systems. As the demand for high-speed, reliable wireless communication continues to evolve, this book provides an in-depth exploration of Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO) technologies, which are essential for modern telecommunications. Readers will find particular interest in the innovative PAPR reduction techniques discussed, which are categorized into signal distortion, coding, and probabilistic methods. These techniques not only aim to mitigate the PAPR issue but also enhance the overall efficiency of wireless systems. The book includes various illustrations, tables, and a structured improving approach, making complex concepts accessible and engaging. The main benefit for readers is the practical application of these techniques, which can lead to improved performance in wireless networks, particularly for telecommunications companies in search of optimizing the systems. This book serves as a valuable resource for researchers and practitioners, providing insights into the latest advancements in PAPR reduction and its implications for future wireless communication technologies.