A 5.8-GHz DSRC Transceiver With a 10-uA Interference-Aware Wake-Up Receiver for the Chinese ETCS

Abstract

This paper presents a fully integrated 5.8-GHz dedicated short-range communication transceiver with a 10-mu A interference-aware wake-up receiver (WuRx) for Chinese electronic toll collection system terminals that can operate with a low standby and operating current consumption. To reduce the current consumption, a high-gain RF envelope detector using a voltage-boosting method is proposed for both the WuRx and receiver (Rx) while the proposed high-power ASK modulator extends output dynamic range in low power consumption. Additionally, a delay-based bandpass filter is adopted in the WuRx to filter out interference from automotive applications, thus increasing the battery lifetime by reducing the probability of a false wake-up. The proposed transceiver is fabricated using 0.13-mu m CMOS technology with a chip size of 2.8 mm(2) for the target frequency range of 5.8 GHz. The measured results demonstrate sensitivities of -44 and -61 dBm for the WuRx and Rx, dissipating currents of 10 mu A and 19 mA from 3.3-V supply voltage, respectively. The transmitter exhibits a normal output power of 5 dBm at an operating current of 46 mA.