解决早期使用的固定密码方式易破解的问题，并解决了滚动跳码机制及前向预测同步技术。
It is resolved that the problem is the machine-processed of rolling hopping code and forward predicting synchronous technology, too.
超宽带冲激无线电技术是近年来新兴的通信技术，其主要核心技术是采用了冲激脉冲技术和跳时码调制。
The UWB impulse radio technology is a new kind of communication method these years, in which the swash impulse and time-hopping code modulation techniques are mainly applied.
跳频方案采用软件无线电技术，采用DSP作为伪码发生器，控制DDS输出频率，得到相应的跳频图案。
The frequency hopping system based on software radio, DSP is used to generate quasi-stochastic sequence and control the output frequency of DDS to construct required hopping maps.
捕获技术是跳码扩频通信系统的关键技术之一，所以我们有必要研究跳码扩频通信系统合理、可行的捕获方法。
Acquisition technology is one of the key technologies of CH-DSSS system, so we need to study reasonable and feasible acquisition methods of CH-DSSS communication system.
捕获技术是跳码扩频通信系统的关键技术之一，所以我们有必要研究跳码扩频通信系统合理、可行的捕获方法。
Acquisition technology is one of the key technologies of CH-DSSS system, so we need to study reasonable and feasible acquisition methods of CH-DSSS communication system.
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