This paper presents an Ultra-Wide-Band transceiver based on a newly proposed double thresholding scheme. The scheme does not require any precise synchronization and thus is practical in ad-hoc networks. The proposed architecture has high noise and multi-path fading signal immunities. All analog blocks are activated in a short period called 'flashing' to suppress total average power. A tested chip is manufactured using 0.15µm FD-SOI CMOS technology. The measured average power is 299µW at 25kbps data-rate over the distance of 35cm.
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