Energy-efficient idle listening scheme using 1 bit sampling in 60 GHz wireless local area network

Owing to the requirement of power-hungry ultra-high-speed analogue-to-digital converters (ADCs), 60 GHz wireless local area network systems face the challenge of high energy 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 1BS generalised likelihood ratio test (1BS-GLRT). The receiver enables packet detection in IL with a 1 bit ADC, which considerably lowers down the energy 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 multi-bit sampling precision, that is, M-bit, ADC to demodulate the packet, which maintains the demodulation performance. Comparisons show that 1BS-IL not only significantly reduces energy consumption, but also achieves competitive detection performance.