(The) BER performance improvement for IDMA systems in overloaded environments = Overloaded 환경에서 IDMA 시스템의 성능 개선

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 391
  • Download : 0
This thesis proposes a modified multiuser iterative detection for synchronous uncoded IDMA system using the scaling factor at the receiver. The existing IDMA receiver feeds back the extrinsic log-likelihood ratios (LLRs) to multiuser detector to improve its estimates in the next iteration. In overloaded scenarios especially where the number of users is greater than the maximum number of users supported in fixed spreading length, the degradation of the performance is caused by increased interferences. However, the proposed iterative multiuser detection provides better estimates based on the extrinsic LLRs manipulated by the scaling factor. Simulation results show that the proposed scheme compensates the degradation of BER performance of IDMA system without additional iterations, compared to the existing iterative multiuser detection scheme.
Advisors
Park, Hyun-Cheolresearcher박현철researcher
Description
한국과학기술원 : 정보통신공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
419183/325007  / 020074339
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 정보통신공학과, 2010.2, [ vii, 31 p. ]

Keywords

the number of users; spreading factor; IDMA; Overloaded Scenario; iterative receiver; 반복 수신기; 사용자 수; 확산 계수; 인터리버 분할 다중 접속; 과부하 환경

URI
http://hdl.handle.net/10203/40111
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=419183&flag=dissertation
Appears in Collection
ICE-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