Patent ID: 8705643

Claim:
A method of channel estimation for a control channel in an orthogonal frequency division modulation (OFDM) system, the method including the steps of: performing weighted averaging over time of input least square (LS) estimates of a plurality of channel condition matrices; performing frequency domain averaging on the input LS estimates using a frequency domain averaging window having a length and/or coefficients determined by a frequency slope from the input LS estimates; performing channel estimates on multiple subcarriers of pilot OFDM symbols from the frequency domain averaged input LS estimates; performing channel estimates on multiple subcarriers of OFDM symbols in the control channel from the channel estimates on the subcarriers of pilot OFDM symbols; comparing the frequency slope to one or more thresholds; determining an estimated frequency selectivity of the control channel; and using the estimated frequency selectivity to determine the frequency domain averaging window length and/or coefficients.