Patent ID: 9742412
Date: 2017-08-22
CPC Classifications: H04W

Claim:
1. A controller for a wireless local area network (WLAN) receiver, the controller generating PLL_Power for powering phase lock loop components and RX_Power for powering wireless receiver components, the controller operative during an expected beacon frame arrival time, the expected beacon frame having a preamble length; at the expected beacon frame arrival time, the controller cyclically operative in a preamble detection interval followed by a sleep interval until a preamble is detected; the preamble detection interval comprising a preamble sensing interval during which a preamble detector is operative, the RX_Power signal asserted during the preamble sensing interval and asserted during a preamble processing interval for the determination of preamble characteristics if a preamble was detected, the RX_Power signal not asserted during the sleep interval; the controller generating the PLL_PWR signal a PLL settling time prior to the preamble detection interval, during the preamble sensing interval, and during the preamble processing interval if a preamble was detected; the controller continuing to assert the RX_Power and PLL_Power signals when a preamble is detected until a packet associated with the detected preamble is received.