It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.
主要是数字调制系统、扩展频谱通信原理和直接序列扩频系统等内容。
In direct sequence spread spectrum communication system, enemy is assumed to detect whole PN sequence chip by chip and a modulated retransmitted interference is created.
在直接序列扩频通信系统中，假设敌方能够逐个比特地检测到整个PN序列，并产生一个调制的转发干扰。
Based on TMS320VC5410 microprocessor developing platform, the direct spread spectrum (DSS) sequence secrecy com-munication system is studied.
基于TMS320 VC 5410微处理器开发平台，对直扩序列保密通信系统进行了研究。
We put forward a method which can easily be realized in DSP and direct sequence spread-spectrum system based on QPSK, it achieved a good performance in tests.
提出了易于在DSP以及QPSK的直接序列扩展频谱系统中实现的方法，并在测试中达到了较好的性能。
The design of the PN code acquisition of the Direct Sequence Spread Spectrum(DSSS) system for a Unmanned Aerial Vehicle(UAV) TT&C System is described in this paper.
讨论一种用于某无人机直序扩频通信测控系统的PN码捕获方案。
The paper introduces the basic composition of transmitter and receiver in direct-sequence spread spectrum system and gives the detailed design block diagram of the receiver.
针对直接序列扩频信号，介绍了其发射和接收部分基本组成，给出了系统接收部分的具体设计框图。
In direct sequence spread spectrum communication system when the spreading gain is limited, the performance of the communication system will be impacted by the strong power of narrowband interference.
在直接序列扩频通信系统的扩频增益受限时，强功率的窄带干扰对系统性能影响较大。
Secondly, the system physical layer's key technology—Direct Sequence Spread Spectrum (DSSS) is described.
在详细说明了扩频通信的理论基础之后，对直接序列扩频技术及系统作了介绍。
Secondly, the system physical layer's key technology—Direct Sequence Spread Spectrum (DSSS) is described.
在详细说明了扩频通信的理论基础之后，对直接序列扩频技术及系统作了介绍。
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