Precoding schemes for multi-user transmission in AF MIMO relaying system = 다중 송신 및 중계기 안테나 시스템에서 다중 사용자를 지원하기 위한 precoding 기법에 대한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 333
  • Download : 0
A relay-based multiple-antenna wireless communication system can increase system capacity and cell coverage. In addition, that makes it possible to support transmission for multiple users located far from the base station. It is necessary to precode the signal vector at both base station and relay station to support multi-user transmission in downlink cellular systems and those precoding schemes are very similar to conventional precoding schemes in multi-user MIMO (MU-MIMO) downlink. In this thesis, we propose the two novel precoding schemes at base station and relay station. The first one is linear optimal precoders which minimize mean square error (MSE) of received signal. The optimal precoders are obtained by solving an unconstraint optimization problem. This problems are coupled to each other, therefore, closed-form solutions do not exist. Thus, each solution is obtained by the proposed iterative algorithm. The second one is to apply one of the MU-MIMO precoding schemes using the lattice reduction (LR) algorithm and modulo operation to our amplify and forward (AF) MIMO relaying system. We perform the average BER performance comparison between the proposed linear optimal scheme and the conventional precoding schemes such as zero forcing (ZF)-precoding and Wiener precoding. And we also check that the proposed LR-aided precoding schemes have the achievable rate which is superior to that of the conventional ZF-precoding.
Advisors
Chun, Joo-Hwanresearcher전주환researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2009
Identifier
308864/325007  / 020073585
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2009.2, [ v, 32 p. ]

Keywords

MIMO; Relay; multiuser; precoding; 다중안테나; 중계기; 다중사용자; 신호처리; MIMO; Relay; multiuser; precoding; 다중안테나; 중계기; 다중사용자; 신호처리

URI
http://hdl.handle.net/10203/38743
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=308864&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0