Patent ID: 9106499
Filing Date: 2015-08-11
Classification: H04B,H04L

Abstract:
1. A method for detecting a frame boundary in multi-carrier signals, comprising: receiving input signals from a communication medium; digitizing the input signals to generate digital samples; generating frequency components for the digital samples, the frequency components being associated with received symbols within the input signals; determining a frame synchronization correlation value based upon a multiplication of frequency components for a subset window of the received symbols with predetermined frequency components for reference symbols; providing additional frame synchronization correlation values for additional subset windows by shifting the frequency components for the received symbols by one symbol and repeating the generating and determining steps for each subset window; analyzing the plurality of frame synchronization correlation values to determine a frame boundary; and outputting a frame synchronization detection signal indicating the frame boundary; wherein each subset window comprises N frequency components for each of Z received symbols; wherein the predetermined frequency components for the reference symbols comprise N frequency components for each of Z reference symbols; and wherein each frame synchronization correlation value is determined by combining output values from the multiplication of the N×Z frequency components for the received symbols with the N×Z frequency components for the reference symbols.