FPGA Implementation of Subcarrier Index Modulation OFDM Transceiver

Abstract

OFDM (Orthogonal frequency division multiplexing) is an efficient modulation scheme for wide-band digital communications and applications ranging from modems to next-generation high-speed wireless data communications[9]. Several enhancements of the OFDM have been proposed to reduce the complexity and power consumption of the transceiver while maintaining the performance. The goal of this paper is to design and to evaluate the performance of a Subcarrier index modulation (SIM) orthogonal frequency division multiplexing (OFDM) transceiver on FPGA. The subcarrier-index modulation (SIM) orthogonal frequency division multiplexing (OFDM) has been presented as a power-efficient and spectral-efficient multi-carrier modulation, and therefore adequate for optical wireless communications. The implementation was done on a Xilinx Virtex 5 platform. The design, based on power saving policy as presented in the SIM OFDM concept, achieves a timing of 9.98 ns and can be clocked at 100 MHz like most of OFDM implementations on FPGA.