300-MHz-frequency-band impulse-radio receiver architecture with all-digital compensation for clock jitter and frequency variation

An impulse-radio receiver architecture for the 300-MHz frequency band is presented. Digital signal processing (DSP), which compensates cycle-to-cycle jitter and frequency drift of transmitter clock, is performed in a FPGA DSP board. Owing to the process, the detection range for transmitted packets is considerably enlarged, which improves the communication range between a transmitter and receiver. A prototype wireless sensor node was developed with a fabricated IC. This sensor node, driven by a passive mechanical vibration sensor, senses the opening and closing motion of the door. The estimated lifetime of the transmitter is over ten years with a coin-sized battery.