论文部分内容阅读
本文详细地叙述了一种新型的数字式SFH900蜂房移动电话体制.该体制是把慢跳频(SFH)与时分技术混合组成的.该体制采用了高斯最小频移键控(GMSK)的Viterbi准相关解调技术,并对其在多径条件下的性能测试做了介绍.还介绍了吸取机内频率分集(Frequency diversity)和干扰分集(Interference diversity)全部优点的连续编码方案.本文阐述了SFH型蜂房系统性能评价的一种模型,给出了各种频率复用式样的质量与容量关系的折衷方案.对于先进的16kbits/s话音编码技术.以及包括用于频谱管理和信令的25%的辅助操作,多小区SFH900网络的频谱效率约为3.5个用户/小区/MHz与普通模担体制相比.其频谱效率有着显著地提高.SFH对变化话务量情况具有固有适应性.对多种业务工作增强了灵活性.通过最近的野外试验证实.SFH900的原理用于第二代蜂房系统是很有希望的.
This paper describes in detail a novel digital cellular phone system SFH900 that combines a slow frequency hopping (SFH) with a time-division technique that uses a Gaussian minimum frequency shift keying (GMSK) Viterbi standard Related demodulation technology and introduces its performance testing under the condition of multipath.It also introduces the continuous coding scheme which sums up all the advantages of Frequency diversity and Interference diversity.This paper describes the SFH A model of a cellular system performance evaluation that gives a compromise between quality and capacity for various frequency reuse patterns For advanced 16kbits / s speech coding techniques, as well as including 25% of spectrum management and signaling, , The spectrum efficiency of multi-cell SFH900 network is about 3.5 users / cell / MHz compared with the common mode carrier system, and the spectrum efficiency is significantly improved.SFH is inherently adaptable to changing traffic conditions. This kind of business activity has enhanced the flexibility, and confirmed by recent field experiments that the principle of the SFH 900 is promising for the second generation of apiary systems.