FPGA Based Dual Carrier Modulation Soft Mapper and Demapper for the MB-OFDM UWB Platform

Abstract — In this paper a Dual Carrier Modulation (DCM) soft mapper and demapper are presented, optimized toward the WiMedia consortium Ultra-Wide Band (UWB) radio platform (ECMA-368). The DCM demapper exploits a Channel-State-Information (CSI) aided scheme coupled with the band hopping information resulting in improved performance compared to previous systems. The proposed mapper and demapper are presented in the context of ECMA-368 as the chosen physical implementation for high data rate Wireless USB (W-USB) and Fast Bluetooth. Implementation aspects of the DCM soft mapper and demapper on Xilinx field programmable gate array (FPGA) are addressed. The DCM soft mapper is implemented with logic minimization to aid the design size. The DCM soft demapper is implemented by computing a dedicated DCM demapping algorithm to output accurate demapping performance and symbol reliability. The design based on Verilog code is efficientl