UWB Modem with Low Power Options

For UWB to be a competitive solution in mobile devices, power consumption of the modem has to be optimized. The focus of this paper is to decrease the power consumption of the modem at physical layer by trading frequency diversity when operating at data rates up to 200 Mbps and by changing the constraint length of convolutional code and using QPSK when operating at data rates 320 Mbps and up. We show more than 50% and 25% gains in power consumption at physical layer with additional 1 dB and 3 dB received SNR at data rates 53.3 Mbps and 480 Mbps, respectively.