A OFDM module for a MB-OFDM receiver

The rules defined by FFC, for marketing and operation of UWB products, permitted the use of orthogonal frequency division multiplexing (OFDM) to implement UWB communications. MB-OFDM is taking place as good approach to UWB, for instance for wireless USB. The latest generations of FPGAs, including DSP capabilities, embedded processors and special features for I/O streaming, are being efficiently used in wireless high-data rate applications. Therefore, FPGAs can be used for UWB technology implementation. This paper discusses the implementation of a specially tailored FFT to demodulate OFDM in a UWB receiver. Special emphasis is put on the design to fulfill the critical time requirements.