Rceiver with Reduced Wake-up Time

摘要

An auxiliary reduced power analog-to-digital converter (ADC) is provided for use during sleep periods of a receiver. The auxiliary ADC has a reduced dynamic range but sufficient accuracy to allow demodulation of signaling information contained in an input signal and to update control parameters used for synchronization and channel estimation. As such, a main higher power, higher dynamic range ADC can be turned off during sleep periods, reducing receiver power consumption. The main ADC is turned on at the end of a sleep period, and the receiver can be ready for receiving data immediately using the main ADC because the control parameters are maintained up to date during the sleep period using the auxiliary ADC.

主权项

1. A receiver, comprising:
a first analog-to-digital converter (ADC) configured to receive an input signal and to produce a first ADC signal; a second ADC configured to receive the input signal and to produce a second ADC signal; a receiver processing chain; a controller configured to receive sleep mode information of the receiver and to generate a control signal in response to the sleep mode information; and a multiplexer configured to receive the first and second ADC signals and to output the first ADC signal or the second ADC signal as an output signal to the receiver processing chain in response to the control signal.