Browse > Article

Performance Improvement of Adaptive Modulation Systems in Wireless Multimedia Communication Environment  

강희조 (목원대학교 컴퓨터멀티미디어공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.7, no.5, 2003 , pp. 893-898 More about this Journal
Abstract
This paper proposes a Truncated Type-II Hybrid ARQ scheme and coding techniques using an adaptive modulation system to achieve high throughput data transmission systems for wireless multimedia communication systems. In this paper, the adaptive modulation system analyzed in Nakagami (m-distribution) fading channel environment. The adaptive modulation system controls the modulation level and symbol rate according to the Nakagami fading parameter(m). When the received Eb/No is high or the Nakagami fading parameter m is high, the propose system selects higher modulation level and higher symbol rate to increase throughput. On the other hand, this system selects lower modulation level and lower symbol rate to prevent throughput performance degradation when the received Eb/No is low. The modulation method have been adopted QPSK(Quadrature Phase Shift Keying), 16QAM(Quadrature Amplitude Modulation), 64QAM, 256QAM. Therefore, adaptive modulation systems with truncated type-II hybrid ARQ scheme is proper for wireless multimedia communication system that require high reliability and delay-limited applications.
Keywords
Adaptive Modulation; Truncated Type- II Hybrid ARQ;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. H. Yang, J. W. Kim, and H. J. Kang, 'Improvement performance of truncated type-II hybrid ARQ scheme and MRC diversity techniques using an adaptive modulation in DS-CDMA celler mobile communication system', KIMICS vol. 5, no. 4, pp. 661-667, July 2001
2 Q. Yang and V. K. Bhargava, 'Delay and coding analysis of a truncated type-II hybrid ARQ protocol', IEEE Trans. Veh. Technol., vol. VT-40. no. 1, pp. 22-32, Feb. 1993
3 S. Lin and D.J Costello Jr., 'Error Control Coding: Fundamentals and Applications', PrenticeHall, New Jersey, 1983
4 J. H. Yang and H. J. Kang, 'Performance analysis of adaptive modulation systems with truncated type-II hybrid ARQ scheme and MRC diversity techniques in Nakagami fading environment', KEES vol. 12, no. 5, pp. 810-816, Aug. 2001
5 上豊樹, 王瓶政 . , 森永規彦, '可變シンボルレ-ト變調多 直數可變適應變調方式の傅送特性', 信學枝報, RCS95-30, May. 1995
6 N. Morinaga, M. Yokoyama, and S. Sampei, 'Intelligent radio communication techniques for advanced wireless communications system', IEICE trans. commun, vol. E79-B, no.3, pp. 214-221, March. 1996