Feedback load reduction scheme in OFDM-based wireless multicast systems

Author

Mingming Li ; Xiaoxiang Wang ; Dongyu Wang ; Jia Zhou

Author_Institution

Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China

fYear

2013

fDate

7-10 April 2013

Firstpage

1068

Lastpage

1072

Abstract

To reduce the feedback load of OFDM-based wireless multicast systems, an opportunistic feedback scheme (OFS) is proposed. OFS aims to only feed the key channel gains that can significantly affect the system throughput back to the base station (BS). By mathematical derivation, the key channel gains are proved to belong to a channel gain interval, which can be estimated by a proposed statistical method. Simulation results show that OFS can significantly reduce the feedback load of OFDM-based multicast system, while remaining 99% multicast throughput performance compared with the full feedback scheme. Besides, the channel fading type of the BS-user link is not required, which would be more realistic.

Keywords

OFDM modulation; channel estimation; feedback; multicast communication; statistical analysis; wireless channels; BS; BS-user link; OFDM-based wireless multicast systems; OFS; base station; channel fading type; channel gain interval; feedback load reduction scheme; full feedback scheme; key channel gains; opportunistic feedback scheme; statistical method; Channel estimation; Feeds; Load modeling; OFDM; Resource management; Throughput; Wireless communication; OFDM; Opportunistic feedback; feedback load; multicast systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2013 IEEE

Conference_Location

Shanghai

ISSN

1525-3511

Print_ISBN

978-1-4673-5938-2

Electronic_ISBN

1525-3511

Type

conf

DOI

10.1109/WCNC.2013.6554712

Filename

6554712