OFDM receiver design and characterization with reduction of PAPR

Abstract

In wireless communication, high data rate transmission can be achieved through Orthogonal Frequency Division Multiplexing (OFDM) which has emerged as the effective multicarrier technique. OFDM systems possesses merits in terms of spectrum efficiency, reduced intersymbol interference and multipath fading mitigation. The major challenge associated with an OFDM system is high Peak-to-Average Power Ratio (PAPR). This paper focuses on efficient lowering of high Peak to Average Power Ratio (PAPR) of OFDM, based on principal component analysis and Discrete wavelet Transform (DWT) based compression technique. Initially, OFDM symbol is pre-processed using PCA (Principal component analysis) to reduce PAPR, and then further lowering is done using DWT Compression. This results in a remarkable reduction of PAPR with the reduction of bit error rate. Simulation results prove that the proposed method provides less PAPR compared to normal OFDM. This paper delivers the design and simulation of various modules in an OFDM receiver along with PAPR reduction techniques. Simulation of each modules of an OFDM receiver is carried out using Xilinx ISE. The verilog HDL is used to program all the components. The final simulation results for PAPR are evaluated using Matlab tool.