Communication systems and methods for energy efficient clockless wake-up receiver body area networks

A communication system for energy efficient clockless wake-up receiver with dynamic clock generation in Body Area Networks (BAN) using a Human Body Communication (HBC) network comprising:

• a wake-up receiver unit configured to operate in a constant active low-power mode for constantly listening to one or more input signals received from a transmitter, wherein the wake-up receiver unit operates in the constant low-power activated mode using leakage power;
• an intermittently operation unit connected to the wake-up receiver unit, wherein the intermittently operation unit comprises:
• a clock generation unit configured to:
• switch to a clock recovery mode for extracting a clock from the one or more modulated data streams, and wherein the clock generation unit switches to a clock maintained mode, for maintaining a clock frequency during absence of the one or more modulated data streams, wherein in the clock recovery mode, the clock generation unit is configured to extract and recover a desired carrier clock frequency from the one or more modulated data streams, and in the clock maintained mode, the clock generation unit is configured to preserve a recovered clock frequency to provide a stable reference for system blocks in the absence of the one or more modulated data streams.