Method and apparatus for transmit pre-correction in wireless communications

A method for transmitting a signal to a subscriber station through at least two transmit antennas, the method comprising:

• transmitting a distinguishable pilot signal through each of the at least two transmit antennas;
• receiving channel estimate information corresponding to said per-antenna pilot signals;
• generating pre-correction delays and weights based on said channel estimate information;
• and
• transmitting a data signal through the at least two transmit antennas based on said pre-correction delays and weights.

A computer readable media embodying a method for transmitting a signal to a subscriber station through at least two transmit antennas, the method comprising:

• transmitting a distinguishable pilot signal through each of the at least two transmit antennas;
• receiving channel estimate information corresponding to said per-antenna pilot signals;
• generating pre-correction delays and weights based on said channel estimate information;
• and
• transmitting a data signal through the at least two transmit antennas based on said pre-correction delays and weights.

A base station apparatus comprising:

• at least two transmit antennas;
• a mixer corresponding to each of said at least two transmit antennas, for applying a per-antenna cover code to a pilot signal to be transmitted through each of said at least two transmit antennas;
• receiver for receiving channel estimate information corresponding to said per-antenna pilot signals for at least two transmit paths per transmit antenna;
• pre-correction processor for generating pre-correction delays and weights based on said channel estimate information;
• and
• a transmitter corresponding to each of said at least two transmit antennas, for transmitting a data signal through said at least two transmit antennas, wherein the data signal transmitted through each of said at least two transmit antennas is adjusted based on said pre-correction delays and weights.