Patent ID: 7949073
Filing Date: 2011-05-24
Classification: H04W,Y02D

Abstract:
1. A wireless receiver, comprising: a non-coherent signal detector configured to receive an incoming data packet, the data packet having a preamble portion and a remainder portion, and perform a non-coherent signal analysis on the preamble portion to extract non-coherently-encoded data in response to a first control signal; a control circuit configured to generate the first control signal, a second control signal, a third control signal, and an input control signal; a coherent signal detector configured to receive the incoming data packet and to perform a coherent signal analysis on the remainder portion to extract coherently-encoded data from the incoming data packet in response to the second control signal; a receiver circuit configured to process the coherently-encoded data; and an input switching element configured to connect the incoming signal to one of the non-coherent signal detector and the coherent signal detector based on the input control signal, wherein the non-coherently-encoded data provides an indication as to whether the remainder portion of the incoming data packet includes the coherently-encoded data, wherein the coherent signal detector is further configured to enter in a low power sleep state in response to the third control signal, and wherein the preamble portion is non-coherently-encoded to include non-coherently-encoded data and the remainder portion is dually-encoded to simultaneously include both coherently-encoded data and non-coherently-encoded data.