Abstract: In the conventional multiband orthogonal frequency division multiplexing ultra wideband (MB-OFDM UWB) receiver, the fast Fourier transform (FFT) lagorithm is realized by the expensive and power-consuming digital signal processor (DSP) chips. In this article, the lower power, lower cost, and lower complexity rel-time analog surface acoustic wave (SAW) chiro Fourier transform devices were used to replace the DSP part. A MB-OFDM UWB receiver based on the M-C-M SAW chirp Fourier transform was presented, and the step of signal transformation from inpit signals was also depicted. The simulation results show that the proposed receiver provides similar bit error performance compared to the fully digital recieber when used in the channel environments proposed by the IEEE 802.15G3a.

Key words: MB-OFDM UWB; SAW; chirp Fourier transform