IEICE Transactions on Communications

IEICE Transactions on Communications 2008 E91-B(4):1219-1222; doi:10.1093/ietcom/e91-b.4.1219

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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letters -- Wireless Communication Technologies

Efficient Transmit Power Allocation with Partial Feedback for Closed-Loop SQRD Based V-BLAST Systems

Hoiyoon JUNG¹, Jongsub CHA¹ and Hyuckjae LEE¹

¹ The authors are with the School of Engineering, Information and Communications University, 119 Munjiro Yuseong-gu Daejeon 305-732, Korea. E-mail: myworldya{at}icu.ac.kr

This letter proposes an efficient transmit power allocation using partial channel information feedback for the closed-loop sorted QR decomposition (SQRD) based V-BLAST systems. For the feedback information, the positive real-valued diagonal elements of R are forwarded to the transmitter. With the proposed transmit power allocation that is numerically derived by the Lagrange optimization method, the bit error rate performance of the system can be remarkably improved compare to the conventional open-loop SQRD based V-BLAST systems without increasing the receiver complexity.

Key Words: MIMO, V-BLAST, closed-loop system, transmit power allocation, sorted QR decomposition

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Manuscript received June 6, 2007. Manuscript revised November 6, 2007.

Reference

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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to My Personal Archive Download to citation manager Request Permissions Google Scholar Articles by JUNG, H. Articles by LEE, H. Social Bookmarking          What's this?