An improved Water Filling algorithm over time varying fading channel

Author

Jie, Yang ; Shenyuan, Yang ; Na, Wei

Author_Institution

Inf. & Commun. Eng. Coll., Harbin Eng. Univ., Harbin

fYear

2008

fDate

25-27 June 2008

Firstpage

499

Lastpage

503

Abstract

A novel power allocation and adaptive modulation algorithm for MIMO systems over time varying fading channel is proposed. Using water-filling theory in space domains, the optimal power allocation and adaptive MQAM by singular values of the channel transfer matrix with average transmit power constraint is obtained. The spectral efficiency is analyzed. The theoretic analysis and simulation results show that the novel algorithm is robust and easy to implement, and the spectral efficiency of the algorithm is greater than that of early-proposed algorithm with total power constraint.

Keywords

MIMO communication; adaptive modulation; fading channels; MIMO systems; adaptive MQAM; adaptive modulation algorithm; channel transfer matrix; power allocation; space domains; time varying fading channel; transmit power constraint; water-filling theory; Channel capacity; Communication systems; Constraint theory; Fading; Filling; MIMO; Power engineering and energy; Time varying systems; Transmitters; Transmitting antennas; MIMO; OFDM; QAM; adaptive modulation; spectral efficiency;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Control and Automation, 2008. WCICA 2008. 7th World Congress on

Conference_Location

Chongqing

Print_ISBN

978-1-4244-2113-8

Electronic_ISBN

978-1-4244-2114-5

Type

conf

DOI

10.1109/WCICA.2008.4594433

Filename

4594433