Investigations on power allocation among beams in nonorthogonal access with random beamforming and intra-beam SIC for cellular MIMO downlink

Yuta Hayashi, Yoshihisa Kishiyama, Kenichi Higuchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

30 Citations (Scopus)

Abstract

We propose an enhancement to the power allocation among multiple beams in our previously reported nonorthogonal access with random beamforming and intra-beam successive interference canceller (SIC) for cellular multiple-input multiple-output (MIMO) downlink. By equally allocating transmission power among multiple beams, the average user throughput within a cell can be enhanced due to the effective use of spatial multiplexing. The throughput of users at the cell edge may be improved by allocating non-equal transmission power among beams since the inter-beam interference is decreased and the received signal power is increased from the viewpoint of the main beam to which most of the transmission power is allocated. Aiming at further enhancement of the system efficiency and celledge user experience in our previous non-orthogonal access scheme, we propose coordinated frequency block-dependent inter-beam power allocation and inter-frequency block power allocation based on fractional frequency reuse (FFR) for intercell interference coordination. Based on simulation results, we show that the proposed power allocation method effectively enhances the tradeoff between the average and cell-edge user throughput.

Original languageEnglish
Title of host publication2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013
DOIs
Publication statusPublished - 1 Dec 2013
Event2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013 - Las Vegas, NV, United States
Duration: 2 Sep 20135 Sep 2013

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Conference

Conference2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013
CountryUnited States
CityLas Vegas, NV
Period2/09/135/09/13

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Hayashi, Y., Kishiyama, Y., & Higuchi, K. (2013). Investigations on power allocation among beams in nonorthogonal access with random beamforming and intra-beam SIC for cellular MIMO downlink. In 2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013 [6692251] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VTCFall.2013.6692251