Throughput performance of an FHMA system with variable rate coding

被引：6
作者：
Park, AS [1 ]
Buehrer, RM
Woerner, BD
机构：
[1] Watkins Johnson Telecommun Grp, Gaithersburg, MD 20878 USA
[2] AT&T Bell Labs, Whippany, NJ 07981 USA
[3] Virginia Polytech Inst & State Univ, Dept Elect Engn, Mobile & Portable Radio Res Grp, Blacksburg, VA 24061 USA
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 1998年 / 46卷 / 04期
基金：
美国国家科学基金会;
关键词：
FHMA; frequency hopping; variable rate coding; Reed-Solomon;
D O I：
10.1109/26.664308
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we compare throughput bounds for a frequency-hopped multiple-access (FHMA) system employing variable rate as well as fixed rate coding (FRC), Nonfading as well as Rayleigh-fading channels are explored. The throughput bounds for the variable rate coding (VRC) schemes are based on the assumption that the number of active users in the system, m, is known at any time while the bounds for the FRC scheme assumes that the fixed code rate is optimized for the user population mean, lambda, where the population is assumed Poisson distributed. We present bounds for theoretical "perfect" codes which achieve capacity as well as bounds for Reed-Solomon (RS) codes of practical, block lengths, Finally, we show the dependence of a VRC scheme upon the accuracy of the estimates of m and present a general comparison of the gains of using VRC versus a realistic FRC scheme.
引用
收藏
页码：521 / 532
页数：12
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