Energy Efficient Power Control for Distributed Transmitters with ZF-Based Multiuser MIMO Precoding

Energy Efficient Power Control for Distributed Transmitters with ZF-Based Multiuser MIMO Precoding
Title:
Energy Efficient Power Control for Distributed Transmitters with ZF-Based Multiuser MIMO Precoding
Other Titles:
IEEE Communications Letters
Publication Date:
06 August 2013
Citation:
Jingon Joung; Sumei Sun, "Energy Efficient Power Control for Distributed Transmitters with ZF-Based Multiuser MIMO Precoding," Communications Letters, IEEE , vol.17, no.9, pp.1766,1769, September 2013, doi: 10.1109/LCOMM.2013.072913.131073
Abstract:
Distributed transmitter (D-TX) system with multiple distributed TXs is considered. To support multiple users, the D-TX system employs a zero-forcing based multiuser multiple-input multiple-output precoding. An energy efficiency (EE) maximization problem is formulated under constraints on {per-user data rate} and per-antenna instantaneous transmit power. The latter constraint is to avoid severe distortion of transmit signals at a power amplifier, i.e., the clipping effects. A low-complexity and performance-effective power control method is then proposed by solving the modification of the original, intractable optimization problem. Transmit antenna selection is elucidated with respect to the EE. Numerical results verify the efficacy of D-TX system employing the proposed EE-aware power control and antenna selection with respect to both system EE and outage performance, and also impart the importance of equal power output capability, i.e., equal maximum output power of the distributed TXs, for energy efficient D-TX systems.
License type:
PublisherCopyrights
Funding Info:
Description:
ISSN:
1089-7798
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