Open AccessOptimal BD‐ZF precoder for multi‐user MIMO downlink transmission
Author(s) -
Yao Rugui,
Nan Huani,
Xu Juan,
Li Geng
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.0517
Subject(s) - telecommunications link , mimo , base station , transmission (telecommunications) , computer science , throughput , interference (communication) , precoding , block (permutation group theory) , multi user mimo , computer network , control theory (sociology) , electronic engineering , telecommunications , mathematics , wireless , engineering , channel (broadcasting) , geometry , control (management) , artificial intelligence
For multi‐user MIMO downlink transmission, a block‐diagonal zero‐forcing (BD‐ZF) precoder is usually used to suppress multi‐user interference. In the case of a large number of transmitted antennas installed at the base station, there exists a larger nullspace than the precoder requires. An optimal BD‐ZF precoder is developed to maximise throughput using the determinant maximisation technique. It helps to gather all gain for the transmission of each user. Numerical results validate that the precoder obtains throughput improvement.