Method and apparatus for generating weights for transmit diversity in wireless communication

An apparatus comprising:

• at least one processor to obtain channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna, and to derive multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna;
• and
• a memory coupled to the at least one processor,
• wherein the at least one processor derives equalizer coefficients for multiple signal copies obtained from the at least one receive antenna and oversampling, and performs equalization with the equalizer coefficients to combine the multiple signal copies.

An apparatus comprising:

• at least one processor to obtain channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna, and to derive multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna;
• and
• a memory coupled to the at least one processor,
• wherein the at least one processor evaluates each of multiple sets of weights and provides a set of weights with best performance as the multiple weights for the multiple transmit antennas.

An apparatus comprising:

• at least one processor to obtain channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna, and to derive multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna;
• and
• a memory coupled to the at least one processor,
• wherein the at least one processor sends the multiple weights to a transmitter to apply on the multiple transmit antennas.

A method comprising:

• obtaining channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna;
• and
• deriving multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna,
• wherein the deriving the multiple weights comprises
• deriving the multiple weights based on an objective function for the equalizer and indicative of a signal-to-noise ratio (SNR) achievable by the equalizer.

A method comprising:

• obtaining channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna;
• and
• deriving multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna,
• wherein the deriving the multiple weights comprises
• evaluating each of multiple sets of weights, and
• providing a set of weights with best performance as the multiple weights for the multiple transmit antennas.

An apparatus comprising:

• means for obtaining channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna;
• and
• means for deriving multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna,
• wherein the means for deriving the multiple weights comprises
• means for deriving the multiple weights based on an objective function for the equalizer and indicative of a signal-to-noise ratio (SNR) achievable by the equalizer.

An apparatus comprising:

• means for obtaining channel estimates for a communication channel between multiple transmit antennas and at least one receive antenna;
• and
• means for deriving multiple weights for the multiple transmit antennas based on the channel estimates and an equalizer used for a data transmission from the multiple transmit antennas to the at least one receive antenna,
• wherein the means for deriving the multiple weights comprises
• means for evaluating each of multiple sets of weights, and
• means for providing a set of weights with best performance as the multiple weights for the multiple transmit antennas.

An apparatus comprising:

• at least one processor to obtain symbols for a data transmission sent from multiple transmit antennas to at least one receive antenna, to process the symbols in frequency domain, and to derive multiple weights for the multiple transmit antennas;
• and
• a memory coupled to the at least one processor,
• wherein the at least one processor derives equalizer coefficients for multiple signal copies obtained from the at least one receive antenna and oversampling, and performs equalization on the symbols with the equalizer coefficients to combine the multiple signal copies.

A method comprising:

• obtaining symbols for a data transmission sent from multiple transmit antennas to at least one receive antenna;
• processing the symbols in frequency domain;
• and
• deriving multiple weights for the multiple transmit antennas,
• wherein the deriving the multiple weights comprises
• deriving the multiple weights based on an objective function for the equalizer.

An apparatus comprising:

• means for obtaining symbols for a data transmission sent from multiple transmit antennas to at least one receive antenna;
• means for processing the symbols in frequency domain;
• and
• means for deriving multiple weights for the multiple transmit antennas,
• wherein the means for deriving the multiple weights comprises
• means for deriving the multiple weights based on an objective function for the equalizer.