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- A new method based on Multi-code Direct Sequence Spread Spectrum(MC-DSSS)technology is proposed to insert a spread spectrum watermarking into a spread spectrum communication signal? 本文提出了一种基于多码扩频(MC-DSSS)技术的数字水印嵌入方法,即利用扩频码的正交性将扩频水印嵌入到扩频通信信号中。
- DCT - based Audio Digital Spreading Spectrum Watermark Technology 一种基于DCT的扩频音频数字水印技术
- spread spectrum watermark 扩频水印
- Spread spectrum was conducted first, and then it was embedded into watermark by means of integer modulo. 嵌入水印时，先对水印信息进行扩频，再利用基于模运算的方法嵌入水印。
- Image spread spectrum watermarking based on adaptive wavelet transform 自适应小波变换的图像扩频数字水印
- It uses spread spectrum technology. 它使用扩频技术。
- Wireless Spread Spectrum Communication and Its. 无线扩频通信及其应用。
- Study of Spread Spectrum Receiver. 扩频接收机的研究。
- After presenting an introduction of digital watermark,this article put s emphasis on analysing exploiting techniques and virtues of spread spectrum technique in digital watermark. 对数字水印技术原理作了一般概述;重点讨论了扩频技术应用到数字水印技术中的方法和优点.
- The Future of Spread Spectrum Communications in the Datong Coal Mine Group Co. 扩频通信技术在大同煤矿的应用前景。
- Spread spectrum watermarking 扩频水印
- Frequency-hopping spread spectrum (FHSS) was developed by the military for secure communications. 跳频扩频（FHSS）是由军方为保密通信开发的。
- 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。
- 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。
- The watermarking embedding arithmetic we chose is to embed the watermark at the chroma DCT field of the I-VOP frame and Motion Vectors in the MPEG-4 bitstream, based on the idea of spread spectrum. 采用的数字水印算法为在MPEG-4压缩视频流的IVOP帧色度DCT域和运动矢量中添加数字水印。
- 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.
- A better method for direct sequence spread spectrum(DSSS) receiver to decrease the acquisition time is proposed. 提出一种减小直接序列扩频(DSSS)接收机信号捕获时间的改进方法。
- A small scale digital trunking communication system based on the spread spectrum technology was presented. 介绍了一种基于扩频技术的全双工通信小型集群通信系统。
- In the fifth chapter, hardware implementation of spread spectrum modulation module, sequence acquisition module, carrier NCO module and CORDIC module are given. 最后给出了扩频模块、载波数控振荡器模块、伪码捕获模块和CORDIC模块的硬件实现。
- This article introduces the principle of the closed link automatic frequency control system in Z2000 spread spectrum transceiver and how to control it. 本文阐述了Z2000接收机内的闭环自动频率控制系统的工作原理，并说明如何控制这个系统。
