The suboptimal power allocation scheme for V-BLAST system with channel feedback delay

Author

Chen Xiao-min ; Zhu Yi-min ; Tan Wei ; Zhu Qiu-ming ; Li Ning

Author_Institution

Coll. of Electron. & Inf. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China

fYear

2014

fDate

2-5 Dec. 2014

Firstpage

409

Lastpage

410

Abstract

In this paper, an adaptive transmit power allocation (TPA) scheme is proposed for Vertical Bell Labs Layered SpaceTime (V-BLAST) system with delayed channel state information (CSI) feedbacks. At the transmitter, the suboptimal adaptive power allocation scheme is presented to minimize bit error rate (BER) with total power constraint. At the receiver, the zero-forcing (ZF) rule is employed for signal detection. In order to get the power allocation parameters, the Lagrange multiplier method is used. Simulation results show that the proposed TPA scheme can effectively improve the system performance with lower computation complexity.

Keywords

delays; feedback; radiocommunication; signal detection; V-BLAST system; adaptive transmit power allocation; bit error rate minimization; channel feedback delay; delayed channel state information feedback; signal detection; suboptimal adaptive power allocation; suboptimal power allocation; vertical Bell labs layered space-time system; zero-forcing rule; Bit error rate; Delays; Mathematical model; Resource management; Signal to noise ratio; Transmitters; Vectors; Feedback delay; Power allocation; V-BLAST;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (ISAP), 2014 International Symposium on

Conference_Location

Kaohsiung

Type

conf

DOI

10.1109/ISANP.2014.7026703

Filename

7026703