Spread spectrum has two distinct flavors: direct sequence and frequency hopping.

该技术有两个明显的变型: 直接顺序与跳频.

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Spread Spectrum Watermark complete source code can be used directly.

扩频水印完整的源代码可以直接使用.

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Spread spectrum CDMA system source code integrity, and can be used directly.

扩频CDMA系统源代码完整, 并可以直接使用.

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The author uses FPGA to generate chaotic Spread - spectrum Sequence and dispread.

该系统利用FPGA实现混沌扩频码的产生以及信息的解扩,在接收端实现扩频码的解调.

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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.

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Secondly, the coefficients quantization - based image watermarking using spread spectrum communication was discussed.

其次, 讨论了利用扩频通信模型的基于系数量化的图像水印算法.

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A de spread - demodulator for Direct Spread - Spectrum ( DS - SS ) system is introduced.

提出了一种适用于直扩通信系统的解调解扩模块.

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It uses spread spectrum technology.

它使用扩频技术.

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Thus , the longer spread spectrum sequences can be used and the robustness accordingly enhanced.

Gold码的应用使得算法可以采用较长的扩频序列,提高了鲁棒性.

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Pseudo random sequence has broad applications in stream cipher , channel coding, and spread spectrum communication.

伪随机序列在流密码 、 信道编码 、 频通信等领域有着广泛的应用.

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Spread spectrum communication uses much larger bandwidth than original information using pseudo noise ( PN ) sequences .

扩频通信采用伪随机 编码调制,使用比信息数据大得多的带宽.

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The spread spectrum technology is introduced to reduce EMI on the mother board.

PC时钟 发生器采用了频谱扩展技术来减小主板上的电磁干扰(EMI).

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Analysis shows that this MSK spread spectrum communication system in the underwater acoustic channel is feasible.

分析表明,采用相位比较差分解调和滑动相关捕获的MSK扩频系统 在水下声信道中的应用是可行的.

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Among the many Spread Spectrum technologies, Direct Sequence Spread Spectrum ( DSSS ) is a most popular technique.

直接序列扩频通信 ( DSSS ) 系统是应用最广泛的一种扩频通信方式.

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In this paper, first, the basic theory and characteristics of spread spectrum communications was introduced.

本文首先介绍了扩频通信的基本理论及其特点,研究了扩频通信系统的基本模型.

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