...：全球定位系统；扩频调制；电子干扰；反干扰措施 [gap=804]Keywords：global positioning system；spread spectrum modulation；electronic jamming；anti—janming technology ...
基于128个网页-相关网页
Other highlights are the design principle of the whole shortwave narrowband DS-SS system and the theory of spread spectrum modulation and its significance.
本文的主要工作包括:第一章介绍任务背景、任务要求及整个短波窄带数字DS-SS系统的原理设计,扩频调制的意义与原理,本文的作者主要工作和论文结构。
参考来源 - 短波窄带数字直接序列扩频通信系统的设计与研制Through low-voltagepower line communications system, using spread spectrum modulation methods achievesthe data transmission communication with the controllers. At the same time, taking thepassword authentication, software traps effective measures improves the reliability of thesystem.
在软件上，不仅采用模块化编程思想，编写了相应程序，实现了多用户的电能计量、显示、存储，而且采用数据备份方式，提高了数据存储的安全性，同时通过实时日历时钟实现了复费率计量方式，并对时钟运行精度进行了温度补偿；在利用低压电力线进行通信方面，采用扩频调制方法实现了与通信控制器之间的数据传输，同时采取了口令认证、软件陷阱等措施有效地提高了系统的可靠性。
参考来源 - 集中式电能表及其远程抄表系统设计·2,447,543篇论文数据，部分数据来源于NoteExpress
This function is used to forward link IS-95 system simulation, including the spread spectrum modulation, matched filter, RAKE receiver, and other related communication module.
此函数用于IS-95前向链路系统的仿真，包括扩频调制，匹配滤波，RAKE接收等相关通信模块。
As a result, the computer simulations show that the LPI capability of the new DSSS modulation become more effective within the same bandwidth and Spread Spectrum gain.
计算机仿真结果表明，在调制带宽或扩频增益不变的前提下，提高了DSSS调制信号的低概率截获性能。
Aiming at the spectrum spread problem of traditional digital modulation signals, a time-phase modulation (TPM) method with abrupt phase change characteristic is proposed.
针对传统数字调制信号频谱扩展问题，提出具有相位突变特性的时相调制(TPM)方式。
应用推荐