摘 要:短波通信試驗(yàn)中,涉及地域廣、試驗(yàn)次數(shù)多、經(jīng)費(fèi)消耗大,采用模擬試驗(yàn)技術(shù)是有效的解決途徑。首先介紹寬帶短波信道模擬器在短波通信試驗(yàn)中的地位,然后說(shuō)明了寬帶短波信道的建模技術(shù)和模擬器各功能模塊的實(shí)現(xiàn)方法,最后闡述了寬帶短波信道模擬器在短波通信試驗(yàn)中的具體應(yīng)用。該技術(shù)可應(yīng)用于短波電臺(tái)鑒定試驗(yàn),對(duì)縮短研制周期,節(jié)省研制費(fèi)用有重要意義。
關(guān)鍵詞:短波通信試驗(yàn); 寬帶短波信道; 信道建模; 信道模擬器
中圖分類號(hào):TN92 文獻(xiàn)標(biāo)識(shí)碼:A
文章編號(hào):1004-373X(2010)13-0004-04
Application of HF Channel Simulator in Shortwave Communication Experiment
WANG Lin1, RUI Guo-sheng2, TIAN Wen-biao1
(1. Graduate Students' Brigade, Naval Aeronautical and Astronautical University, Yantai 264001, China;
2. Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, China)
Abstract:The simulation technology is an effective solution for the disadvantages of wide district, lots of experiments and huge cost in shortwave communication experimentation. The status of wideband HF channel simulator in shortwave communication experimentation is introduced. The modeling technique of wideband HF channel and the realization of each function module are proposed. The application of wideband HF channel simulator in shortwave communication experimentation is expatiated. This technique can be applied to appraisal experimentation of shortwave broadcasting station, and has important signi-ficance on saving RD time and outlay.
Keywords:shortwave communication experimentation; wideband HF channel; channel modeling; channel simulator
0 引 言
短波通信的工作頻率是3~30 MHz,與其他通信方式相比,它具有設(shè)備簡(jiǎn)單、體積較小、成本低廉、節(jié)省電量、靈活機(jī)動(dòng)、組網(wǎng)容易以及通信距離遠(yuǎn)等優(yōu)點(diǎn),所以在很長(zhǎng)時(shí)間里,一直都是一種國(guó)防科研試驗(yàn)中主要的通信手段之一[1]。尤其是在諸軍種協(xié)同作戰(zhàn)的遠(yuǎn)程通信、戰(zhàn)區(qū)C3I系統(tǒng)中發(fā)揮重要的作用。但是短波信道由于具有時(shí)變和色散的特性[2],使短波具有頻帶窄、容量小、相互干擾嚴(yán)重的特點(diǎn),各種短波通信設(shè)備必須經(jīng)過(guò)大量的通信試驗(yàn)以檢驗(yàn)其性能。
在短波通信試驗(yàn)中,涉及參試單位多,需要在各種地域反復(fù)測(cè)量,這必然消耗大量人力、物力和財(cái)力,而通過(guò)短波信道模擬器可以解決在真實(shí)地域通信試驗(yàn)中遇到的上述問(wèn)題。短波信道模擬器借助先進(jìn)的仿真技術(shù)手段實(shí)現(xiàn)在實(shí)驗(yàn)室環(huán)境下進(jìn)行通信試驗(yàn),因其具有有效性、經(jīng)濟(jì)性、安全性、直觀性等特點(diǎn),在通信試驗(yàn)中可廣泛使用。……