Pre-encoded transmission method for MIMO system
A multi-output, multi-input technology, applied in the field of precoding, can solve the problems of large deviation and low spectrum efficiency, and achieve the effect of reducing errors and improving spectrum utilization
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[0074] In the precoding transmission method of a MIMO system of the present invention, in the feedback phase, the mobile station uses the MMSE combiner to calculate the channel direction index (CDI) and channel quality information (CQI) of the quantized equivalent channel, and then in the scheduling stage and precoding stage use the feedback information to perform corresponding processing to improve spectrum utilization efficiency.
[0075] Such as figure 1 As shown, the precoding transmission method of the MIMO system of the present invention includes:
[0076] Step 11, since each user does not know the precoding transmission matrix T during feedback, so the real receiver combining vector cannot be obtained and the equivalent channel h k , but in an actual multi-user system, the base station scheduler always tends to select users whose feedback channels are orthogonal to each other, because it can make the interference between users smaller and the capacity relatively larg...
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