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there is a power allocation in MIMO system as MIMO relaying system for BER performanc

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abdulmonem89

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hi,,,

i ask if there is a power allocation in mimo system to simulate BER as AF mimo relaying system ??
 

If you know CSI, then you can do power control for a cost function like capacity
 

thanxx for your reply

what you mean by "a cost function"??

in capacity i can do power control, but what about when make simulation for BER, i mean there is a power allocation in MIMO system for BER simulation??

please if you can explain why we do normalization for transmitted power in mimo system ?
 

In general if you have a total power P and N ransmit antennas, the power is divided uniformly, i.e.: each antenna transmits with P/N. For the normalization, it is usually done for simplicity of exposition without any loss of generality.

If the power is not uniformly distributed, then you have P1, P2, ..., PN such that P1+P2+...+PN=P. Then you can find the equivalent SNR and BER expression, based on that try to minimize BER such that P1+P2+...+PN=P. Try this if it leads any where.

Explore the literature if there are some papers done on this.

Regards
 

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