Patent ID: 7675844
Filing Date: 2010-03-09
Classification: H04L

Abstract:
1. A method of acquiring, at a receiver, fine timing synchronization for an Orthogonal Frequency Division Multiplexing (OFDM) signal as transported over a channel, the method comprising: in the receiver; determining, after acquiring frame synchronization, an impulse response of the channel, dynamically creating a window function corresponding to the impulse response; and selecting a multiplicity of samples of the OFDM signal in accordance with the window function, the multiplicity of samples time aligned with an OFDM demodulator; wherein the dynamically creating a window function corresponding to the impulse response further comprises deriving a window function with a duration L corresponding to an OFDM symbol less a length of the impulse response (M), and wherein the deriving a window function further comprises deriving a window function with a transition portion in accordance with a seventh order polynomial Nyquist function.