Browse > Article

Improvement of Normalized CMA Channel Equalization and Turbo Code for DS-CDMA System  

박노진 (광운대학교 대학원 전자통신공학과 신호처리 연구실)
강철호 (광운대학교 대학원 전자통신공학과 신호처리 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.7A, 2002 , pp. 659-667 More about this Journal
Abstract
In this dissertation, in the Turbo Code used for error correction coding of the recent digital communication systems, we propose a new S-R interleaver that has the better performance than the existing block interleaver, and the Turbo Decoder that has the parallel concatenated New structure using the MAP algorithm. For real-time voice and video services over the third generation mobile communications, the performance of two proposed methods is analyzed by the reduced decoding delay using the variable decoding method by computer simulation over multipath channels of DS-CDMA system. Also, a Modified NCMA based on conventional NCMA is proposed to improve the channel efficiency in the mobile communication system, and is investigated over the multi-user environment of DS-CDMA system through computer simulation.
Keywords
Citations & Related Records
연도 인용수 순위
  • Reference
1 C. Paradias and D. Slock, 'A Normalized Sliding Window Constant Modulus Algorithm for Blind Equalization,' 14th GRETSI Symposium on Signal and Image Processing, Juan Les Pins, Frnance, pp. 507-510, September 1993
2 강경우, 박노진, 강철호, '감소된 복호 지연을 갖는 SOVA 기반 터보 부호에 관한 연구,' 한국통신학회 논문지, 제 25권 제11B호, pp. 736-745, 2000   과학기술학회마을
3 민장기, 박노진, 강철호 '비동기 DS-CDMA 시스템에서 채널 등화에 관한 연구' , 한국통신학회 논문지, 제 25권 10B호, pp. 1760-1768, 2000
4 D. Brown, D. Anair and C. Johnson, 'Fractionally Sampled Linear Detectors for DS-CDMA,' Proc. Asilomar Conf. on Signals, Systems, and Computers(Pacific Grove, CA), November 1998
5 박노진, 강철호, 'CDMA 채널 환경에서 인터리버 설계 및 MAP 기반 터보 부호에 관한 연구,' 한국통신학회 논문지, 제 26권 1B호, pp. 59-66, 2001
6 D. Jones, 'A Normalized Constant-Modulus Algorithm,' Proc. IEEE Proceeding, Vol. 1, pp. 694-697, 1996
7 T. Kashihara, 'Adaptive Cancellation of Mutual Interference in Spread Spectrum Multiple Access,' Proc. IEEE ICC, pp. 44.4.1-44.4.5, 1980
8 S. Benedetto, cDivsalar and F. Pollaia, 'Soft-Output Decoding Algorithm in Iterative Decoding of Turbo Codes,' TDA progress rep. 42-124, Jet Propolusion Lab, pp. 63-86, 1995
9 D. H. Woo, T. S. Yoon and Y. S. Byun, 'A Study on Blind Adaptive Receiver for DS-CDMA,' IEICE Trans. Comm, Vol. E83-A, No. 6, pp. 1168-1174, June 2000
10 박노진, 강철호, 'DS-CDMA 시스템에서 정규화된 채널 등화 개선에 관한 연구,' 한국통신학회 논문지, 제 26권 6B호, pp. 736-745, 2001
11 M. Tsatsans, 'Inverse Filtering Criterion for CDMA Systems,' IEEE Comm. Magazine, Vol. 34, No. 10, October 1996
12 D. Jones, 'A Normalized Constant Modulus Algorithm,' Proc. IEEE 29th Asilomar Conf. Signals, Syst., Comput., Pacific Grove, C4, Vol. 1, pp. 694-697, November 1996
13 J. Treichler and B. Agee, 'A New Approach to Multipath Correction of Constant Modulus Signals,' IEEE Trans. ASSP. Vol. 31. No. 2, pp. 459-471, April 1983   DOI
14 B. Unal, 'Performance of Turbo-Codes in Time-Synchronous BPSK /CDMA Systems and Rayleigh Fading Channel,' VTC'99, Vol. 3, pp. 1575-1579, September 1999
15 계환원, 구정우, 송홍엽, '병렬구조 복호기에서 LLR의 합을 사용한 터보 부호의 성능분석', 한국통신학회 논문지, 제 24권 11A호 pp. 1678-1684, 1999