A zero-forcing linear precoder for downlink multi-user LoS MIMO channels

Author

Alimadadi, Mohammadreza ; Mohammadi, Arash ; Abdipour, A. ; Soltani, Mohammad Dehghani

Author_Institution

Amirkabir Univ. of Technol., Tehran, Iran

fYear

2012

Firstpage

128

Lastpage

133

Abstract

In this paper we introduce an algorithm to design a zero-forcing linear precoder for downlink multi-user Line-of-Sight (LoS) MIMO systems. We observe that the existence of LoS component, changes the restrictions of conventional SVD-BD approach on channel dimensions and correlation of users. In addition, we find a new criterion that relates the received signal to noise ratio and optimal form of pure LoS channel matrix. We perceive that this algorithm improves performance nearly 1.5 dB in compare to the SVD-BD method for Rayleigh channels in the case of two users.

Keywords

MIMO communication; Rayleigh channels; precoding; singular value decomposition; LoS channel matrix; Rayleigh channel; SVD-BD approach; channel dimension; downlink multiuser LoS MIMO channel; downlink multiuser line-of-sight MIMO system; received signal to noise ratio; zero-forcing linear precoder; Interference; MIMO; Mathematical model; Receiving antennas; Transmitting antennas; LoS channel; MIMO systems; Shannon capacity; block diagonalization; linear precoder; uniform linear array;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications (IST), 2012 Sixth International Symposium on

Conference_Location

Tehran

Print_ISBN

978-1-4673-2072-6

Type

conf

DOI

10.1109/ISTEL.2012.6482970

Filename

6482970