Patent ID: 8401121
Filing Date: 2013-03-19
Classification: H04L

Abstract:
1. A method comprising: determining, at a receiver of a wireless network device, a frequency associated with a first symbol of a received signal, wherein the received signal comprises a plurality of symbols; generating, at each of a plurality of filters matched to a frequency response of the receiver for a corresponding each of a plurality of predefined symbol combinations, a frequency output associated with each of the plurality of predefined symbol combinations; calculating a frequency error, associated with each of the plurality of predefined symbol combinations, that indicates a difference between the frequency output associated with each of the plurality of predefined symbol combinations and the frequency associated with the first symbol of the received signal; determining, based on comparing the frequency error associated with the each of the plurality of predefined symbol combinations, that a first frequency error associated with a first of the plurality of predefined symbol combinations is within a threshold of a second frequency error associated with a second of the plurality of predefined symbol combinations; and generating a symbol error notification based on said determining that the first frequency error associated with the first of the plurality of predefined symbol combinations is within the threshold of the second frequency error associated with the second of the plurality of predefined symbol combinations.