Abstract
In this paper, the mutual information and power allocation are discussed for vector Gaussian channels with finite discrete inputs. It is shown that the classic water filling and mercury-water filling policies, which are allocating power to a bank of independent parallel channels, may lead to significant loss compared to the original system without power allocation for finite discrete inputs. a generalized linear precoder, which is a non-diagonal and non-unitary matrix, is proposed for cross- channel power allocation to maximize the mutual information for vector channels. Numerical examples show that the new precoding-Based power allocation provides significant gain for a broad region of signal-to-noise ratios. © 2008 IEEE.
Recommended Citation
C. Xiao and Y. R. Zheng, "On the Mutual Information and Power Allocation for Vector Gaussian Channels with Finite Discrete Inputs," GLOBECOM - IEEE Global Telecommunications Conference, pp. 4690 - 4694, article no. 4698673, Institute of Electrical and Electronics Engineers, Dec 2008.
The definitive version is available at https://doi.org/10.1109/GLOCOM.2008.ECP.898
Department(s)
Electrical and Computer Engineering
International Standard Book Number (ISBN)
978-142442324-8
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Dec 2008
