Pulse or digital communications – Transmitters – Plural diversity
Reexamination Certificate
2007-11-20
2007-11-20
Kim, Kevin (Department: 2611)
Pulse or digital communications
Transmitters
Plural diversity
Reexamination Certificate
active
11115447
ABSTRACT:
A method and apparatus for increasing the data rate and providing antenna diversity using multiple transmit antennas is disclosed. A set of bits of a digital signal are used to generate a codeword. Codewords are provided according to a channel code. Delay elements may be provided in antenna output channels, or with suitable code construction delay may be omitted. n signals represent n symbols of a codeword are transmitted with n different transmit antennas. At the receiver MLSE or other decoding is used to decode the noisy received sequence. The parallel transmission and channel coding enables an increase the data rate over previous techniques, and recovery even under fading conditions. The channel coding may be concatenated with error correction codes under appropriate conditions.
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Calderbank Arthur Robert
Naguib Ayman F.
Seshadri Nambirajan
Tarokh Vahid
AT&T Corp.
Kim Kevin
LandOfFree
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