Patent ID: 8625685
Filing Date: 2014-01-07
Classification: H04L

Abstract:
1. A method for performing signal quality calculations in a communication device, comprising: transforming, into a frequency domain, raw preamble signals received from a station; extracting first pilot sub-carrier signals corresponding to a first preamble segment from the transformed preamble signals; performing N-order differential operations on the extracted first pilot sub-carrier signals to generate differential pilot signals, wherein N is a finite integer greater than 1, wherein performing the N-order differential operations comprises: calculating and outputting a plurality of values each indicating a difference between adjacent input samples of the extracted first pilot sub-carrier signals that are input sequentially, and sequentially repeating the calculating and outputting on the plurality of values (N−1) times to generate the differential pilot signals; taking separate power measurements for the extracted first pilot sub-carrier signals and the differential pilot signals; calculating one or more signal quality parameters using the separate power measurements for the extracted first pilot sub-carrier signals and the differential pilot signals; and transmitting the one or more signal quality parameters to the station.