Space-time transmit diversity systems and methods for ofdm applications

A method for mapping a rate one space-time block code for a 2 n antenna transmitter where n>=2, the method comprising transmitting 2 n transmission symbols on each sub-carrier of a plurality of sub-carriers in an OFDM spectrum by:

• for each transmission interval:
• on each of n pairs of adjacent OFDM sub-carriers, transmitting a respective Alamouti code block containing two transmission symbols on a respective pair of antennas such that all sub-carriers are used and only one pair of antennas is active during a given transmission interval for a given sub-carrier.

21-54. (canceled)

A method for mapping a space-time block code for a 2 n antenna transmitter where n>=2, the method comprising transmitting 2 n transmission symbols by:

• during two consecutive transmission intervals, transmitting a respective Alamouti code block containing two transmission symbols on a respective pair of antennas.

A method for mapping a space-time block code for a 2 n antenna transmitter where n>=2, the method comprising transmitting 2 n transmission symbols by:

• for each transmission interval;
• on a pair of adjacent OFDM sub-carriers, transmitting a respective Alamouti code block containing two transmission symbols on a respective pair of antennas.

A method for mapping a space-dine block code for a 2 n+1 antenna transmitter where n>=1, the method comprising transmitting transmission symbols by:

• during k pairs of consecutive transmission intervals, transmitting a respective Alamouti code block containing two transmission symbols on a respective pair of antennas such that all antennas are used during at least one of the k pairs of consecutive transmission intervals and at least one transmit antenna is used during two of the k pairs of consecutive transmission intervals.

A method for mapping a space-time block code for a 2 n+1 antenna transmitter where n>=1 adapted to transmit transmission symbols by:

• for each transmission interval:
• on k pairs of sub-carriers, transmitting a respective Alamouti code block containing two transmission symbols on a respective pair of antennas such that all antennas are used during at least one or the k pairs of consecutive transmission intervals and at least one transmit antenna is used during two of the k pairs of sub-carriers.

A method for mapping a rate ¾ space-time block code for a 4 antenna transmitter, the method comprising transmitting 3 transmission symbols by:

• during a pair of consecutive transmission intervals, transmitting a respective Alamouti code block containing two transmission symbols on a first respective pair of antennas on a given sub-carrier and transmitting a respective Alamouti code block containing one transmission symbol on a second respective pair of antennas on a same sub-carrier such that all antennas are used during the pair of consecutive transmission intervals.

A method for mapping a rate one space-time block code for a 2 n antenna transmitter where n>=2, the method comprising transmitting 2 n transmission symbols by:

• during a pair or consecutive transmission intervals, transmitting a respective Alamouti code block containing two transmission symbols on a respective pair of antennas on a given sub-carrier such that all antennas are used during the pair of consecutive transmission intervals and each pair of antennas is active on a different sub-carrier.

A method for mapping a rate one space-time block code for a 2 n antenna transmitter where n>=2, the method comprising transmitting 4 n transmission symbols by:

• during a pair of consecutive transmission intervals, transmitting a respective Alamouti code block containing n transmission symbols on a respective pair of antennas on a given sub-carrier such that all antennas are used during the pair of consecutive transmission intervals.