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Optimal Transmit Strategy for MIMO Channels with Joint Sum and Per-antenna Power Constraints

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Citation Author(s):
Phuong Cao
Phuong Le Cao and Tobias J. Oechtering
Submitted by:
Phuong Cao
Last updated:
28 February 2017 - 5:48am
Document Type:
Poster
Document Year:
2017
Event:
ICASSP 2017
Presenters:
Phuong Le Cao
Paper Code:
3931
Categories:
MIMO Communications and Signal Processing
 

This paper studies optimal transmit strategies for multiple-input multiple-output (MIMO) Gaussian channels with joint sum and per-antenna power constraints. It is shown that if an unconstraint optimal allocation for an antenna exceeds a per-antenna power constraint, then the maximal power for this antenna is used in the constraint optimal transmit strategy. This observation is then used in an iterative algorithm to compute the optimal transmit strategy in closed-form. Finally, a numerical example is provided to illustrate the theoretical results.

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