FPGA Implementation of SLM Technique for OFDM Communication Systems

Abstract

Objectives: To investigate Orthogonal Frequency Division Multiplexing (OFDM) and perform peak-to-average power ratio reduction using Selective Mapping(SLM) method. Methods/Statistical Analysis: Mathematical modeling and Matlab simulation of SLM technique for PAPR reduction of the OFDM signal. Verify the result obtained with FPGA implementation using Xilinx Spartan 3 Protoboard XC 3S 400 board and performance comparison with Matlab and FPGA implementation. Findings: PAPR obtained with the FPGA implementation of SLM technique for the case of 4 QAM OFDM signal with 1024 number of subcarriers is 9.8 dB whereas it is 8.9 dB with Matlab simulations. The value obtained with FPGA implementation and Matlab simulation are 2.8 and 3.7 dB less from the original OFDM signal respectively. Application/Improvements: It is widely used in a modern multicarrier high data rate communication system as it requires fewer resources with fast computational capability at the cost of a marginal reduction in the transmission data rate.