Research And FPGA Implement On OFDM PAPR Reduction Via Tone Reservation

Based on the analysis of the problem of high peak-to-average-power ratio (PAPR) of OFDM system, a technique of Tone Reservation (TR) to reduce PAPR is researched and implemented on FPGA in this thesis.At the beginning, the basic theory of OFDM technology is introduced. OFDM technology exploits the mutual orthogonal frequency subcarrier, which has the higher spectrum efficiency and the good performance to resist frequency-selective fading, so it is suitable to transmit high-data-rate in multi-path channel. But, existing problem of high PAPR restricts the wide application of OFDM in communication filed.Then, the theory of TR is analyzed systematically. The main idea of TR is to use unavailable or reserved tones to design a peak-canceling signal which reduces the peak of a transmit data block. Based on that, the controlled iterative clipping algorithm is utilized to design and implement TR technique, and the performance of reducing PAPR via the technique is simulated by MATLAB in different conditions. The result of simulations indicates that PAPR can be reduced 2-3dB in the probability of 0.0001.Finally, this algorithm is implemented on FPGA. According to different functions, the algorithm is divided into some modules and Timing Simulation of each module is done with the Modelsim. Then, the result of PAPR reduction is analyzed.