Patent ID: 8576961
Filing Date: 2013-11-05
Classification: H04L

Abstract:
1. A method for windowing time domain data samples derived from a data frame comprising: obtaining a plurality of time domain samples of a transmitted instance of a synchronization data frame; obtaining a coarse estimate of a starting value for the synchronization data frame; correlating the time domain samples of the transmitted instance with a locally stored instance of the synchronization data frame at a plurality of time value offsets to determine a corresponding plurality of magnitudes of correlation values; comparing the magnitudes of the correlation values corresponding to a first subset of the offsets to a first predetermined threshold to determine a first edge offset; comparing the magnitudes of the correlation values corresponding to a second subset of the offsets to a second predetermined threshold to determine a set of potential second edge offsets; selecting a second edge offset from the set of potential second edge offsets using a false alarm mitigation procedure; using the first and second edge offsets to determine an overlap and add length estimate; using the first edge offset to modify the coarse estimate of the starting value to determine an estimate of a starting position of a time-domain data window for subsequent processing by an overlap-and-add circuit; and providing the starting position estimate and the overlap and add length estimate to the overlap-and-add circuit.