Title :
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
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;
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
DOI :
10.1109/WCICA.2008.4594433
