Patent ID: 8494066
Filing Date: 2013-07-23
Classification: H04L

Abstract:
1. A method for forming a channel estimate in an orthogonal frequency division multiplexing (OFDM) communication device, the method comprising: receiving an OFDM signal comprising a plurality of reference signal (RS) tones and a plurality of data symbols; extracting said plurality of RS tones from said received OFDM signal to form an input vector; inverse Fourier transforming said input vector to form a time domain representation of said channel estimate; applying a mask to taps of said time domain representation of said channel estimate to form a masked time domain representation of said channel estimate; Fourier transforming said masked time domain representation of said channel estimate to form a frequency domain representation of said channel estimate; and before inverse Fourier transforming said input vector, shifting an RS tone from an original position in said input vector such that said plurality of RS tones are evenly spaced.