Analysis of sum-rate gain for multiuser MIMO downlink system with limited feedback and feedback resource constraint

Author

Jin, L. ; Hu, Z. ; Gu, X.

Author_Institution

Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester, UK

fYear

2010

fDate

27-28 Sept. 2010

Firstpage

73

Lastpage

76

Abstract

An improved scheduling algorithm is proposed for optimizing the sum-rate gain in a multiuser Multiple-Input and Multiple-Output (MU-MIMO) downlink system with limited feedback and Block Diagonalization (BD) precoding. A low bits feedback for user selection is followed by a high bits feedback to improve the system sum-rate capacity. Based on our analysis and the simulation result, it shows that the newly proposed algorithm can be a potential solution to a MU-MIMO downlink system with feedback resource constraint. A key finding is that an extra step with a high bits feedback can increase the system capacity, especially when signal-to-noise ratio is at high value. The performance analysis for the sum-rate gain using the proposed algorithm is presented in detail and is verified by the simulation results.

Keywords

MIMO communication; multi-access systems; precoding; block diagonalization precoding; feedback resource constraint; multiuser MIMO downlink system; signal-to-noise ratio; sum-rate capacity; sum-rate gain; user selection; Downlink; Interference; MIMO; Receivers; Scheduling algorithm; Signal to noise ratio; Transmitters; BD precoding; MU-MIMO; downlink; limited feedback; scheduling;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Technology Conference (EuWIT), 2010 European

Conference_Location

Paris

ISSN

2153-3644

Print_ISBN

978-1-4244-7233-8

Type

conf

Filename

5615235