DSP implementation of narrowband interference cancellation algorithms in MB-OFDM based ultra-wideband communication system

The multiband orthogonal frequency division multiplexing ultra-wideband (MB-OFDM UWB) system suffered from the narrowband interference (NBI) due to the presence of coexistence communication system, such as worldwide interoperability for microwave access (WiMAX). If we deal with the NBI before the receiver, the performance of MB-OFDM UWB system can be significantly improved. The NBI cancellation algorithms have been proposed and verified, which could mitigate the interference efficiently. In this paper, the digital signal processor (DSP) implementation of three NBI cancellation algorithms are presented to improve the performance of MB-OFDM UWB system. We implemented the algorithms in both floating-point and fixed-point arithmetic using the TMS320C6713 DSP Starter Kit (DSK) from "Texas Insturment Inc.", and the algorithms are optimized to meet the realistic restriction in terms of execution speed, code length and preciseness. Finally, some statistics such as resource occupied and time consumed are compared in code composer studio (CCS) profile.