Multicarrier transmit diversity

Details Multicarrier transmit diversity Multicarrier transmit diversity

2002-07-05

2009-08-18

Nguyen, Steven H (Department: 2419)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Quadrature carriers

C370S335000, C370S342000, C375S260000, C375S267000, C375S285000, C375S299000, C375S347000

Reexamination Certificate

active

07577085

ABSTRACT:
Method, apparatus, and data packet format to implement transmit diversity in a multicarrier environment is disclosed. For diversity transmission operations, space frequency encoding techniques are employed creating distinguishable first and second time domain signals from a multicarrier frequency domain symbol bearing data of interest, which are then broadcast in parallel over first and second transmission units respectively. For diversity reception operations, complementary space frequency decoding is used to recover a corrected multicarrier frequency domain symbol from a time domain signal containing either this symbol, a space frequency modified symbol based on the multicarrier symbol, or a possible partial/complete combination of both. The data packet format includes portions defining a transmission diversity semaphore, a preamble enabling training of a receiver receiving the data packet, and a payload. This payload includes plural data symbol pairs, each defining a first symbol for transmission by a first transmission unit of a diversity transmitter, and a second symbol for transmission by a second transmission unit of the diversity transmitter, the second symbol being derived from the first symbol.

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