Journal
ELECTRONICS LETTERS
Volume 51, Issue 14, Pages 1121-1123Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el.2015.0517
Keywords
MIMO communication; precoding; interference suppression; determinants; optimisation; optimal BD-ZF precoder; multiuser MIMO downlink transmission; multiple-input multiple-output transmission; block-diagonal zero-forcing precoder; multiuser interference suppression; MUI suppression; base station; BS; determinant maximisation technique; throughput improvement
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Funding
- Natural Science Basic Research Plan in the Shaanxi Province of China [2014JM2-6094]
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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.
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