Maximum ratio transmission
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United States of America Patent
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Apr 22, 2008
Grant Date -
Oct 18, 2007
app pub date -
Jun 22, 2007
filing date -
Sep 17, 1998
priority date (Note) -
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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 receiving antenna, where the channel coefficient between the receive antenna and a transmit antenna [I] i is h.sub.i, the weighting factor is h.sub.i* divided by a normalizing factor, .alpha., which is.times..times. ##EQU00001## where K is the number of transmitting antennas. When more than one receiving antenna is employed, the weighting factor is.times. ##EQU00002## where g =[g.sub.1. . . g.sub.L), H is a matrix of channel coefficients, and .alpha.is a normalizing factor.times..times..times..times..times..times..times..times..times. ##EQU00003##
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