Maximum ratio transmission
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United States of America Patent
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Nov 30, 2004
Issued Date -
N/A
app pub date -
Jun 19, 2002
filing date -
Sep 17, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An arrangement where a transmitter has a plurality of transmitting antennas that concurrently transmit the same symbol, and where the signal delivered to each transmitting antenna is weighted by a factor that is related to the channel transmission coefficients found between the transmitting antenna and receiving antennas. In the case of a plurality of transmit antennas and one receive antenna, where the channel coefficient between the receive antenna and a transmit antenna i is h.sub.i, the weighting factor is h.sub.i * divided by a normalizing factor, .alpha., which is ##EQU1## where K is the number of transmitting antennas. When more than one receiving antenna is employed, the weighting factor is ##EQU2## where g=[g.sub.l . . . g.sub.L ], H is a matrix of channel coefficients, and .alpha. is a normalizing factor ##EQU3##
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