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Power Allocation for Distributed Transmit Diversity with Feedback Loop Delay

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2 Author(s)
Kwonhue Choi ; Dept. of Inf. & Commun. Eng., Yeungnam Univ., Gyongsan, South Korea ; Huaping Liu

We study two power allocation (PA) schemes for distributed transmit diversity systems. We first derive the performance of the instantaneous channel gain feedback-based PA (ICG-PA) scheme in the presence of channel variation during feedback delay. We then study channel gain variance feedback-based PA (CGV-PA) to mitigate the performance degradation of ICG-PA caused by feedback delay. Finally, we derive design rules for optimum CGV-PA from a compact and accurate performance expression derived.

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Communications, IEEE Transactions on  (Volume:59 ,  Issue: 1 )