Patent ID: 6853689

Claim:
A method for estimating channel coefficients ĝ 11 ,ĝ 12 ,ĝ 21 ,ĝ 22 , associated with a transmit diversity channel in a radio communication system having a Base Station (BS) and at least one Mobile Station (MS), said transmit diversity channel being transmitted over at least two propagation paths from at least two antennas associated with said BS, said method comprising the steps of: providing a sequence of pilot symbols for each of said at least two antennas for transmission from said BS to said MS over said transmit diversity channel; receiving a series of symbols r 1 , r 2 , r 3 , r 4 at said MS from said transmit diversity channel; establishing a matrix of values of said sequence of pilot symbols wherein said sequence of pilot symbols is selected such that said matrix has full rank; and determining said channel coefficients ĝ 11 ,ĝ 12 ,ĝ 21 ,ĝ 22 , using said matrix and said series of symbols r 1 , r 2 , r 3 , r 4 .