Signal channel is composed of photodetection preamplifier and filter circuit , reference channel and correlation demodulator are realized by labview 信号通道由硬件实现,包括光电探测前置放大电路及滤波电路;参考通道及相关解调器部分则利用labview软件编程实现。
It emphases on the system of signal pulse signal channels , and sets forth the methods of realizing 、 way of demodulation 、 advantage and disadvantage . afterwards , the paper introduces how to design a “ s band remote measuring receiver ” 重点介绍了单通道单脉冲跟踪体制,对其实现途径、解调方式、较其它体制的优缺点作了全面的阐述。
The innovations of this thesis are that an assemble idea for system signal source design , a method for broadcasting and storage of signal channel , and a theoretic design of context based signal destination locating are proposed 论文的新颖之处是:提出了本系统在信源设计方面的会聚思想、在信道方面的广存(广播+存储)方式、在信宿方面的按内容定位设计理念。
Secondly , the noise of the system is analyzed . to improving the signal - to - noise of the system , design the phase sensitive demodulation system which contains three parts : signal channel , reference channel and correlation demodulator 其次,分析了系统各部分的噪声,以提高系统信噪比为原则,设计了由信号通道、参考通道、相关解调器三部分组成的相敏检波系统。
It works often in burst mode . the signal channel is complex and large . several protocols can be applied to the system : fixed addressing , committed addressing and stochastic addressing ( aloha ) protocols 系统使用的多址协议可以是固定分配地址的、按需分配地址的或者是随机接入的,这三种方式中,当网络用户数量大而业务量小,用户间歇工作时候,随机接入多址技术简单而高效。