Performance improvement in GSM networks due to slow frequency hopping

G. Tunnicliffe, A. Sathyendran, A. Murch
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引用次数: 14

Abstract

This paper investigates the performance of GSM systems employing slow frequency hopping when a limited number of hopping channels are used. Frequency hopping increases spectral efficiency by enabling frequencies to be reused more intensely. Previous analysis of frequency hopping systems have considered systems that have a large number of hopping channels available. However, due to spectrum and frequency planning constraints, there are often only a limited number of channels available for hopping in most cellular systems and consequently maximum improvement cannot be achieved. The performance of such a system is evaluated and a comparison made between frequency hopping and intra-timeslot handover. Intra-timeslot handover is found to have better interference immunity performance than two channel frequency hopping when the mean C/I is less than approximately 16 dB in both the urban and suburban environments. The results show that the performance of frequency hopping surpasses that of intra-timeslot handover as more hopping channels are deployed.
GSM网络中由于跳频慢而导致的性能改进
本文研究了在有限跳频信道下采用慢跳频的GSM系统的性能。跳频通过使频率能够更频繁地重复使用来提高频谱效率。以往对跳频系统的分析考虑了具有大量可用跳频信道的系统。然而,由于频谱和频率规划的限制,在大多数蜂窝系统中通常只有有限数量的信道可用于跳频,因此无法实现最大的改进。对该系统的性能进行了评价,并对跳频和时隙内切换进行了比较。在城市和郊区环境中,当平均C/I小于约16 dB时,时隙内切换比两通道跳频具有更好的抗干扰性能。结果表明,随着跳频信道的增加,跳频的性能优于时隙内切换。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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