Title :
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
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;
Conference_Titel :
Telecommunications (IST), 2012 Sixth International Symposium on
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-2072-6
DOI :
10.1109/ISTEL.2012.6482970
