the wireless channel based on spread spectrum modulation can assure the digital video signal communication safe and withstanding the high noise disturbing condition 而基于擴(kuò)頻技術(shù)的無(wú)線通信信道,為視頻的傳輸提供了保密及抗干擾性能強(qiáng)等優(yōu)點(diǎn)。
in order to solve the problem of measurement-control signal communication in situation, we propose a detail project that the lonworks technique is transplanted to high-voltage power line in this paper 為了解決特殊情況下的測(cè)控信號(hào)傳輸問(wèn)題,本論文提出lonworks技術(shù)向高壓電力線移植的具體方案。
in the irrigation the water works are remote and scattered, therefore means of signals communication and network structures must be taken into account in the water measurement system 在灌區(qū)中要進(jìn)行集中控制管理,滿足管理現(xiàn)代化的要求,還應(yīng)考慮用合理的通訊方式和網(wǎng)絡(luò)結(jié)構(gòu)將各個(gè)測(cè)站聯(lián)成網(wǎng)絡(luò),建立供水計(jì)量監(jiān)控系統(tǒng)。
test and modification of wireless microwave power transmission system and wireless control signal communication system are carried out . experimental data are obtained and feasibility of the system is verified . while defectives have been found in the wireless control signal communication system, further improvement suggestions are presented 最后搭建了實(shí)驗(yàn)?zāi)P停M(jìn)行了實(shí)際調(diào)試,取得了實(shí)測(cè)數(shù)據(jù),驗(yàn)證了系統(tǒng)的可行性,同時(shí)發(fā)現(xiàn)了控制信號(hào)無(wú)線通信系統(tǒng)中存在的不足,并提出了進(jìn)一步的改進(jìn)方案。