Spread spectrum technique can improve the robustness of watermarking.

扩频技术应用于数字水印,可以提高水印的鲁棒性.

CDMA is a kind of advanced wireless spread spectrum technique.

码分多址技术（CDMA）是一种先进的无线扩频技术。

There are two main alternatives, Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum.

主要有两种选择，直接序列扩频和跳频扩频。

Direct sequence spread spectrum communications is one of the most typical spread spectrum modes.

其中直接序列扩频通信是目前使用最典型的扩频工作方式。

Direct sequence spread spectrum technique is the most widely used one and the kernel of the spreading spectrum techniques for people to study.

直接序列扩频技术是应用最广的一种扩频技术，研究它便于掌握扩频技术的精髓。

Taking spread spectrum signal for example, it is detected by peak character of cross-correlation and proper gate.

针对扩频信号，根据互相关函数的峰值特性，设定适当的门限，检测扩频信号。

Spread spectrum technology competes in the unregulated portion of the radio electromagnetic spectrum.

扩频技术是在无线电电磁频谱中无条例管制的部分中竞争.

The pseudo random noise ranging code has been applied extensively to spread spectrum communications.

伪随机码在扩频通信中得到广泛应用。

An application of point to point spread spectrum communications system is introduced in detail.

文中介绍了多站点对点扩频系统的使用实例.

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。