Home // AICT 2019, The Fifteenth Advanced International Conference on Telecommunications // View article
Authors:
Abheek Saha
Keywords: Multi-user MIMO; Dirty Paper Coding; Interference Alignment; Shared channel; Block Cholesky decomposition
Abstract:
Multi-User Multiple-Input Multiple-Output (MIMO) transmission is one of the key technologies for achieving the ambitious targets for coverage and throughput in modern cellular networks. It allows us to take advantage of the large number of transmission elements possible in the radio-heads or eNodeB and allow users to share a channel. A key challenge in the deployment of multi-user MIMO is the problem of cross-user interference due to mutual nonorthogonality within the shared channel. The transmitter must select an optimal transmit precoding so as to eliminate this cross-user interference, since the receivers cannot coordinate and jointly decode the transmission. In this paper, we propose a novel algorithm for multi-user MIMO precoding over a shared channel. Our algorithm is a combination of ideas both from Dirty Paper Coding as well as the more recent Interference Alignment techniques. We demonstrate that we can achieve better performance than zero-forcing and that our algorithm is practical to implement within the framework of existing 4th and upcoming 5th generation systems, being realizable in linear time.
Pages: 6 to 14
Copyright: Copyright (c) IARIA, 2019
Publication date: July 28, 2019
Published in: conference
ISSN: 2308-4030
ISBN: 978-1-61208-727-6
Location: Nice, France
Dates: from July 28, 2019 to August 2, 2019