• Proposes a new lossy robust spread spectrum watermark algorithm.

    提出了一种新的无失真鲁棒扩频水印方法。

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

    该技术两个明显的变型直接顺序频。

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  • There are several difficult problems in the research of spread spectrum FH/DS system.

    研制扩展频谱FH/DS系统时,会遇到一些很困难问题

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  • The near field spread spectrum ranging algorithm based on software radio is investigated.

    基于软件无线电距离扩频测距算法进行了研究。

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  • First, the basic principles of power line communication and spread spectrum are introduced.

    论文首先介绍了电力线载波通信扩频技术基本原理

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  • An adaptive acquisition strategy for slow frequency hopping spread spectrum system is proposed.

    提出了一种应用于跳扩频系统自适应捕获策略

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

    其中直接序列扩频通信目前使用典型扩频工作方式

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  • Methods and systems for time synchronizing a receiver to a spread spectrum signal are described.

    本发明描述了接收机扩频信号进行时间同步方法系统

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

    主要两种选择直接序列扩频频扩频。

    youdao

  • In this paper, a spread spectrum digital watermark based on Gaussian pyramid decomposition was proposed.

    提出一种基于高斯金字塔分解数字图像扩频水印技术。

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  • Spread spectrum communication is the most efficient mode in the strong noise environment such as the coal mine.

    扩频通信矿井噪声环境有效的通信方式

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  • Spreading sequences design is one of the key task in the direct-sequence spread spectrum communication systems.

    扩频序列设计直接序列扩频通信系统关键课题之一

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  • Merits of the Linear FM are that it is not necessary to have an equalizer or the spread spectrum code modulation.

    线性调频调制优点:不须在接收端添加均衡滤波器,不须进行扩频编码。

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  • 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改进方法

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  • The technology of directs sequence spread spectrum (DSSS) have been applied in the military communication widely.

    直接序列扩频技术军事通信得到了广泛应用

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  • The applications of SAWTDL in the TDMA spread spectrum mobile communication system is mainly introduced in this paper.

    文中主要介绍声表面波抽头延迟线(SAWTDL)TD MA扩频移动通信系统中的应用

    youdao

  • This article has described one method of transmitting physiological data through wireless spread spectrum communication.

    本文描述一种通过扩频通讯方式实现生理数据无线传输方法

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  • Spread spectrum communication is implemented by a spread spectrum chipset, which is composed of two parts:baseband and RF.

    扩频通讯扩频芯片组来实现芯片组基带射频部分组成。

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  • The ownership prover insert the watermark into the host signal using symmetric watermark technology based on spread spectrum.

    所有权证明者采用基于扩频的对称水印技术宿主信号嵌入水印;

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  • Through the analysis of the spread spectrum and power line carrier spectrum, the authors design a set of remote reading system.

    通过扩频通信电力线载波通信特点分析设计实现了一远程抄表系统。

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  • It mainly contains the digital modulate system, the SS communication theory and the direct sequence spread spectrum (DSSS) system.

    主要数字调制系统扩展频谱通信原理直接序列扩频系统等内容。

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  • The methods of acquisition and tracking of spread spectrum(SS) signals, hardware design and software flow, are discussed in detail.

    文中较详细讨论了扩频信号捕获跟踪方法硬件设计软件流程

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  • Reverse-spread spectrum device, time sequence inspection device, channel evaluation device and method for measuring frequency faults.

    扩频装置时序检测装置,信道估计装置频率误差测量方法

    youdao

  • An intelligent lighting system for railway goods yard based on spread spectrum power line carrier communication technique is proposed.

    扩频电力线载波通信技术设计了铁路站场智能化照明系统

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  • Direct sequence spread spectrum (DSSS) and despreading first structure is most advantageous of all kinds of spread spectrum techniques.

    扩频系统中性能最好直接序列扩频解扩后解调方式

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  • This paper expounds the advantage of spread spectrum, principle and important parameters of the system, and the international regulation.

    本文阐述扩频技术优点、各种扩频系统(直接扩频、跳频混合系统)的原理主要参数,以及国际上规定。

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  • The spread spectrum fingerprints embedding is researched based on tree-structure at multicast following Gaussian with bandwidth requirement.

    环境下,考虑带宽影响研究了一种基于结构扩频指纹嵌入系统。

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  • A new modulated lapped biorthogonal transform (MLBT) was introduced for narrowband interference suppression in spread spectrum communications.

    引入一种新的调制重叠正交变换(MLBT)用于扩频通信窄带干扰抑制

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  • Traditional blind additive ss (spread spectrum) watermarking systems have such features: high robustness, low detection value and small capacity.

    传统加性扩频水印系统具有棒性、检测值容量特点

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  • The performance of Direct Sequence Spread Spectrum(DSSS) in severe pulsed noise interference will be badly degraded when the duty factor is small.

    脉冲干扰占空比较小时,干扰能量集中,导致直接序列扩频DSSS)系统误码性能较差。

    youdao

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