Maximum ratio transmission
First Claim
1. A method comprising:
- receiving, via L receive antennas, from K transmit antennas, L received versions of a symbol, c, weighted prior to transmission by a transmit weighting vector proportional to [gH]Hermitian, where g is a vector having L components and the superscript Hermitian is the Hermitian operator; and
weighting the L received versions of the symbol, c, by a weighting factor based on g to generate L weighted received versions of the symbol c,wherein H is a channel estimate matrix having K×
L elements hkl, corresponding to channels between the K transmit antennas and the L receive antennas,wherein K is greater than one, andwherein L is greater than one.
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Accused Products
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 hi, the weighting factor is h*i divided by a normalizing factor, a, which is
where K is the number of transmitting antennas. When more than one receiving antenna is employed, the weighting factor is
where g=[g1 . . . gL), H is a matrix of channel coefficients, and α is a normalizing factor
111 Citations
8 Claims
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1. A method comprising:
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receiving, via L receive antennas, from K transmit antennas, L received versions of a symbol, c, weighted prior to transmission by a transmit weighting vector proportional to [gH]Hermitian, where g is a vector having L components and the superscript Hermitian is the Hermitian operator; and weighting the L received versions of the symbol, c, by a weighting factor based on g to generate L weighted received versions of the symbol c, wherein H is a channel estimate matrix having K×
L elements hkl, corresponding to channels between the K transmit antennas and the L receive antennas,wherein K is greater than one, and wherein L is greater than one. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification