Energy-Efficient 1-Bit-Sampling Idle Listening Scheme for 60-GHz WLAN Systems

Due to the requirement of power-hungry multi-Gsps analog-to-digital converters (ADCs), 60-GHz wireless local-area network (WLAN) systems face the challenge of high power consumption in idle listening (IL). To cope with this problem, a 1-bit-sampling IL (1BS-IL) scheme is proposed in this paper. This scheme includes a mixed 1/M-bit-sampling receiver, and a corresponding packet detection algorithm termed 1-bit-sampling generalized likelihood ratio test (1BS-GLRT). The receiver enables packet detection in IL with a 1-bit ADC, which considerably lowers down the power consumption; besides, the 1BS-GLRT algorithm guarantees promising performance on packet detection. Once detecting the arrival of a packet, the receiver switches to an original sampling precision (i.e., M-bit) ADC to demodulate the packet, which maintains the demodulation performance. Comparisons show that 1BS-IL not only significantly reduces power consumption, but also achieves competitive detection performance.