Multiuser diversity with quantized feedback

Author

Al-Harthi, Yahya ; Tewfik, Ahmed ; Alouini, Mohamed-Slim

Author_Institution

Dept. of Electr. & Comput. Eng., Minnesota Univ.

Volume

6

fYear

2005

fDate

2-2 Dec. 2005

Lastpage

3732

Abstract

In this paper, we propose an optimal discrete rate switch-based multiuser diversity system (DSMUDiv) that reduces the feedback load while preserving the essential of the scheme´s performance in some cases. We examine the DSMUDiv scheme using two scheduling criteria depending on the distribution of the mobile users in the cell: (i) absolute signal-to-noise ratio (SNR)-based scheduling in the case of independent and identical distributed (i.i.d.) users, and (ii) normalized SNR-based scheduling in the case of non-i.i.d. users. The paper includes the derivation of closed-form expressions of the feedback load in the case of absolute and normalized SNR-based scheduling and the spectral efficiency in the case of absolute SNR-based scheduling. Computer simulation is used to evaluate the spectral efficiency in the case of normalized SNR-based scheduling. Under slow Rayleigh fading assumption, we compare our scheme with the optimal (full feedback load) selective diversity scheme

Keywords

Rayleigh channels; diversity reception; feedback; mobile radio; scheduling; Rayleigh fading assumption; SNR-based scheduling; closed-form expressions; computer simulation; discrete rate switch-based multiuser diversity system; feedback load reduction; feedback quantization; mobile users; scheduling criteria; signal-to-noise ratio; spectral efficiency; Closed-form solution; Computer simulation; Diversity methods; Fading; Feedback; Processor scheduling; Quality of service; Rayleigh channels; Signal to noise ratio; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE

Conference_Location

St. Louis, MO

Print_ISBN

0-7803-9414-3

Type

conf

DOI

10.1109/GLOCOM.2005.1578467

Filename

1578467