Research Article
Joint C-V-BLAST and DS-NOMA for Massive MIMO
@INPROCEEDINGS{10.1007/978-3-319-72823-0_45, author={Khawla Alnajjar and Mohamed El-Tarhuni}, title={Joint C-V-BLAST and DS-NOMA for Massive MIMO}, proceedings={5G for Future Wireless Networks. First International Conference, 5GWN 2017, Beijing, China, April 21-23, 2017, Proceedings}, proceedings_a={5GWN}, year={2018}, month={1}, keywords={Gold code Massive MIMO MRC Non Orthogonal Multiple Access (NOMA) V-BLAST}, doi={10.1007/978-3-319-72823-0_45} }- Khawla Alnajjar
Mohamed El-Tarhuni
Year: 2018
Joint C-V-BLAST and DS-NOMA for Massive MIMO
5GWN
Springer
DOI: 10.1007/978-3-319-72823-0_45
Abstract
We investigate the performance of modified non orthogonal multiple access (NOMA) which uses the modified low complexity Vertical Bell Laboratories Layered Space Time (C-V-BLAST) in an uplink massive multiple-input-multiple-output (MIMO) deployment with distributed single-antenna users and a large base-station array. Unlike previous work which assumes no spreading, we focus on the scenario where signal spreading is included by using the Gold Code family. It is shown that the proposed scheme provides a significant performance improvement over the conventional V-BLAST system for a large MIMO deployment when the number of transmit and receive antennas are comparable by exploiting the extra dimension added by the spreading to mitigate the interference. However, for a massive MIMO system, both schemes provide similar performance. We also show that the proposed scheme has a much better performance when the average received power for the users is the same, a scenario that the C-V-BLAST scheme struggles with due to its dependence on the ordering of users according to their power levels.
