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STUDIES OF HIGH FUNCTIONAL AND ECONOMICAL INTEGRATED COMMUNICATION NETWORK THOROUGHITS COMMUNICATION EXPERIMENTS AND EVALUATION OF SIGNAL ATTENUATION CHARACTERISTICS

通过通信实验和信号衰减特性评估研究高性能、经济型综合通信网络

基本信息

批准号：
06650427
负责人：
HATSUDA Takeshi
金额：
$ 1.54万
依托单位：
HOKKAIDO INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

项目摘要

For the aspects of a new minimum cost, high reliability system strategy for the Hokkaido integrated Telecommunication (HIT) network, where real time operation is not demanded, system designs and propagation experiments for site diversity and satellite diversity characteristics were carried out by using JCSAT transponder.[1] HIT Network system design and PC-USAT systemThree aspects of a new minimum cost, high reliability system strategy for the Hokkaido integrated Telecommunication (HIT) network are examined. There are (1) A packet communication ultra small aperture terminal (PC-USAT) system, which contains a method for overcoming the statellite links rain attenuation discontinuities, (2) An optimum rain margin technique and the 14/12 GHz band rain, show attenuation and site diversity (SD) experiments, and (3) A low bit rate medical information and still-picture simultaneous transmission system.[2] Site diversity experiments using JCSAT transponderAs for the system design of the HIT network, it must first overcome rain attenuation discontinuity of satellite links. To resolve some of these problems, site diversity (SD) characteristics measurement for introduction possibility of SD experiments were carried out. The effect of typhoon to SD characteristics were measured.[3] Satellite diversity experiments using plural satellitesThe possibilities of the satellite diversity (Sat.D) system for VSAT earth station in snowing climates are examined by using plural satellites. Three satellite down-link signals are measured in experiments, i.e., JCSAT-1, JCSAT-3 and Broadcasting Satellite (BS) and diversity gains are obtained by the Sat.D simulation program. From the obtained Sat.D results for snowing attenuation in snowing climates, it becomes clear that the Sat.D would be utilized effectively for the VSAT system, rather than conventional SD system.

针对北海道综合通信网（HIT）不要求真实的实时操作的新的最低成本、高可靠性系统策略，利用JCSAT转发器进行了系统设计和站点分集和卫星分集特性的传播实验。[1]HIT网络系统设计和PC-USAT系统研究了北海道综合电信（HIT）网络的一种新的最低成本、高可靠性系统策略的三个方面。有（1）一种分组通信超小孔径终端（PC-USAT）系统，它包括一种克服卫星链路雨衰不连续性的方法，（2）一种最佳雨裕量技术和14/12 GHz频带雨衰和位置分集（SD）实验，和（3）一种低比特率医疗信息和静止图像同时传输系统。[2]利用JCSAT转发器进行站点分集试验HIT网络的系统设计首先要克服卫星链路的雨衰不连续性。为了解决其中的一些问题，进行了立地多样性（SD）特性测量SD实验的引入可能性。测量了台风对SD特征的影响。[3]利用多颗卫星进行卫星分集试验研究了VSAT地面站在下雪气候下利用多颗卫星进行卫星分集（Sat.D）系统的可能性。在实验中测量了三个卫星下行链路信号，即，利用Sat.D仿真程序对JCSAT-1、JCSAT-3和广播卫星（BS）进行了仿真，得到了分集增益。从所获得的Sat.D在下雪气候下的降雪衰减结果，很明显，Sat.D将被有效地用于VSAT系统，而不是传统的SD系统。