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spectrum modulated
相关语句
  频谱调制
     On the basis of analyzing of idea of time varying spectral whitening, the paper presented a simple, stable and very efficient spectrum modulated method.
     本文在对以往的方法进行分析的基础上 ,借助于时变谱白化的思想 ,提出了一种简单、稳定且十分有效的频谱调制方法。
短句来源
     This paper first summarizes the difficulty in detecting and identifying helicopter, then analysis the spectrum signature of radar echo signal from helicopter, and estimates the width of the spectrum modulated by helicopter blades.
     该文首先总结了直升机目标雷达探测和识别的难点,然后分析了直升机目标雷达回波信号频谱调制特征, 给出了直升机回波频谱宽度的估算式。
短句来源
  “spectrum modulated”译为未确定词的双语例句
     Based on the communication engineering applications, this thesis study the intelligent transmission technology and the performance of the spread spectrum modulated sequence. In this thesis, some own conclusions have been concluded and testified using communication simulink under the possibility of the applied environment.
     本文在面向通信工程应用的基础上,对智能传输技术和扩频调制码的性能进行了一定的研究,提出了自己的结论并使用通信仿真技术对这些结论在可能的应用环境下进行了证明。
短句来源
     In this paper, based on the structural feature of the Fibonacci optical superlatticeand the propagating characteristics of the ultra-short pulse, the spectrum modulated by SPMand influenced by chirp based on SPM is studied. The results confirm that the spectrum isbroadened, and the total length of the optical superlattice is confined by SPM.
     从准周期Fibonacci超晶格的结构特点和超短脉冲的传输特性出发,分析了超短脉冲在Fibonacci超晶格中传输时,自相位调制对脉冲频谱的调制,同时考虑了由SPM造成的频率啁啾对脉冲特性的影响,发现SPM对脉冲特性影响很大,它不但使脉冲频谱展宽,而且限制超晶格的总体长度及基本单元的结构。
短句来源
     On the basis of establishing the communication model of digital image watermarking, the authors generate a visual mask from the cover image to keep the fidelity of the image, and then embed the spread spectrum modulated watermark into the corresponding spatial domain of the digital image. At the same time, the error correction coding technique is used to improve the anti-jamming capability of the watermark.
     在建立数字图像水印的通信模型的基础上,通过生成原图的视觉掩模以充分保证图像的逼真度,在数字图像相应的空间域嵌入扩频码调制水印,同时利用纠错编码技术来进一步增强水印的抗干扰性能.
短句来源
  相似匹配句对
     Spectrum-modulated technique.
     频谱调制技术
短句来源
     The spectrum of the B(?)
     B(?)
短句来源
     The Modulated Spectrum of Distributed Feedback Semiconductor Laser
     分布反馈半导体激光器的调制谱
短句来源
     IMPROVED P-M SPECTRUM
     改进的P—M谱
短句来源
     THE MODULATED STRUCTURE OF ILMENITE
     钛铁矿的调制结构
短句来源
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  spectrum modulated
The prime characteristic of spread spectrum modulated signals is that their bandwidth is greater than the information rate.
      


In this paper, a convolutional enceded orthogonal sequence multicode CDMA system is proposed so as to transmit user's high rate data to fit the requirement of the services of the future mobile communication. Similar to multicarrier modulation, the higher rate date transmitted by serial-to-parallel is converted at first, and then the lower rate data streams are convolutionally encoded and spreaded spectrum modulated by a set of orthogonal sequence Being different from multicarrier modulationg, all lower...

In this paper, a convolutional enceded orthogonal sequence multicode CDMA system is proposed so as to transmit user's high rate data to fit the requirement of the services of the future mobile communication. Similar to multicarrier modulation, the higher rate date transmitted by serial-to-parallel is converted at first, and then the lower rate data streams are convolutionally encoded and spreaded spectrum modulated by a set of orthogonal sequence Being different from multicarrier modulationg, all lower branch data streams use single carrier. The performance of the system over Nakagami fading channel is calculated, and numerical result is analyzed.

本文提出了一种可以有效地实现用户高数据率传输的卷积编码正交扩频多码CDMA系统,以适应未来移动通信业务发展的需求.此系统相似于多载波CDMA系统,对于用户传输的高速率数据首先进行串-并转换,对变换后的低数据流再进行卷积编码,然后再进行正交序列扩频调制.不同于多载波CDMA系统,各支路扩频信号用同一载波进行调制发送.这里,对此系统在Nakagami衰落信道的性能进行了计算,并对数值结果进行了分析.

In this paper, based on the structural feature of the Fibonacci optical superlatticeand the propagating characteristics of the ultra-short pulse, the spectrum modulated by SPMand influenced by chirp based on SPM is studied. The results confirm that the spectrum isbroadened, and the total length of the optical superlattice is confined by SPM.

从准周期Fibonacci超晶格的结构特点和超短脉冲的传输特性出发,分析了超短脉冲在Fibonacci超晶格中传输时,自相位调制对脉冲频谱的调制,同时考虑了由SPM造成的频率啁啾对脉冲特性的影响,发现SPM对脉冲特性影响很大,它不但使脉冲频谱展宽,而且限制超晶格的总体长度及基本单元的结构。

A direct sequence spread spectrum modulating chip STEL-2000A is introduced in this paper. Then the design of a spread spectrum data transmission communication device is discribed which is based on this chip, and controlled by a 16-bit single chip processor 80C196. Finally, the design and realization of the hardware and software are introduced.

介绍了直接序列扩频处理器芯片STEL—2000A,描述了基于该芯片采用16位单片机80C196作为控制单元配电网电力线扩频数传通信设备,最后给出了其软硬件设计原理及实现过程。

 
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