Nowadays, power line digital carrier equipments have been used widely in China.
目前，电力线数字载波通信设备已经在国内得到了广泛的应用。
The thesis points out a new direction for the development of new-style digital carrier machine.
本文为新型数字载波机的研制指明一个新的方向。
The author also makes some Suggestions for frequency selection of digital carrier and parameters selection of spectrum shaping filter.
对数字载波的频率及频谱成形滤波器的特性参数的选择提出了建议。
To avoid excessive transmission distortion, the bandwidth between transmitter and receiver must be at least twice that with digital carrier modulation.
为避免过量的传输失真，发射机与接收机之间的带宽至少要两倍于数字载波调制的带宽。
The design of the carrier recovery loops in an all-digitized QAM receiver is investigated and two cascaded digital carrier recovery loops are proposed.
本文着重研究全数字QAM接收机中载波恢复环路的设计，采用快慢两个数字环路来进行载波恢复。
In the model communications system, the modulation process also is loaded the digital signal in the carrier scope value, the carrier frequency or on the carrier phase.
在典型的通信系统中，调制过程是数字信号加载在载波的幅度值、载波的频率或者载波的相位上。
By digital simulation, the Ac carried wave system and its equivalent Dc system are checked and the feasibility of Dc method equivalent to the Ac carrier wave system is verified.
通过数字仿真，比较了交流载波系统和其等效直流系统，验证了交流载波系统等效直流方法的可行性。
Digital phase generated carrier (PGC) is the key method for larger dynamic and high sensitivity detection of optical fiber interferometers.
数字化相位生成载波(PGC)方法是实现光纤干涉仪大动态范围、高精度信号检测的主要手段。
For the single carrier Digital Television Broadcasting-Terrestrial receiver, the method of direct adapt equalization can be used.
在单载波数字电视地面广播接收机中，可以采用对接收信号直接进行自适应均衡的方案。
The characteristics of university network transmission lies in the digital sending and receiving of information. It is a new culture carrier based on undergraduates.
高校网络传播是以数字化的信息发送和接受为特征的，以高校大学生为传播对象的新型文化载体。
A digital communication system is introduced to replace analog system used in underground locomotive carrier communication system.
提出了在架线电机车载波通信系统中，用数字通信取代模拟通信方式。
The design of direct digital frequency synthesizer(DDFS)in the way of local carrier demodulation is mainly introduced.
文章重点讨论了本地载波解调中的直接数字频率合成器（DDFS）模块的设计。
In a digital communication system, usually there exist carrier frequency offset between the sender and the receiver.
在数字通信系统中，发送端和接收端的载波往往存在一定的频差。
In dynamic measurement field, when using digital speckle pattern interferometry, we always deal phase with time-average method and spatial carrier phase-shifting method.
在动态测试领域中，数字散斑干涉技术常用到的相位处理方法有时间平均法和空间载波相移法。
When processing digital base-band, the signal of pilot-frequency was taken out from normal carrier channel and it would be used for transmitting pseudo pilot-frequency.
在数字基带处理时，从正常载频信道中提取出导频信号，用于伪导频的发射。
In the process of signal digital intermediate-frequency received, digital down convertion, frequency tracking of carrier and phase locked loop are the keys.
在信号的中频数字接收过程中，数字下变频、载波频率与相位跟踪是设计的关键所在。
The technique is based on digital demodulation of generalised non-linear carrier fringe pattern.
该技术基于广义非线性载波条纹的数字解调。
This thesis deals with the synchronization technologies for all digital receiver, particularly carrier offset estimation for MPSK signal.
本文研究全数字接收机中的同步技术，重点是MPSK信号的载波频偏和相位误差的估计和恢复算法。
Finally the developments of digital power line carrier are briefly addressed.
最后对数字电力线载波通信的发展趋势作简要的分析。
Digital TV signal modulation is a message transmitting method which is expressed by some discrete states in carrier wave. Only carrier wave modulating parameter is detected.
数字电视信号的调制是用载波信号的某些离散状态来表征所传送的信息，在接收端只对载波信号的离散调制参量进行检测。
The key of digital transmission system lies in carrier synchronization and channel equalization.
数字传输系统的关键在于载波同步和信道均衡。
With the three encoding methods, the digital signals sent in transmitting part can be well hidden by chaotic carrier and recovered correctly in the receiver.
发送端传送的数字信号在三种调制方式下均可很好的隐藏于混沌载波中，并在接收端得到正确恢复。
Finally, the performances of this digital demodulator are tested through the simulation of BER and the system joint lock-time, and a carrier recovery module is implemented in FPGA.
最后，通过对误码性能和系统联合锁定时间进行仿真，验证了数字解调器性能，并在FPGA中实现了载波恢复模块。
The multiple iterative digital image hiding algorithm based on chaos sequences is introduced, with which a secret image can be hidden in one carrier image through many images.
提出了基于混沌序列的数字图像多幅迭代混合算法，利用图像的迭代混合可以将一幅图像通过一组图像隐藏起来。
Digital technology as the basis of new digital media, the network as the carrier of information dissemination media, endow the authentic and mass information of new digital media.
以数字技术为基础的新的数字媒体，以网络为载体的信息传播媒体，赋予了新的数字媒体的真实性和质量信息。
This arithmetic can detect the digital watermark without the original carrier image and the original watermark.
该算法在抽取水印时不需要原始载体图像和原始水印。
The traditional digital signal demodulation method that realizes more complex has the problems of carrier recovery, symbol synchronization and so on.
传统的数字信号解调方法存在着载波恢复、符号同步等问题，实现起来较为复杂。
The traditional digital signal demodulation method that realizes more complex has the problems of carrier recovery, symbol synchronization and so on.
传统的数字信号解调方法存在着载波恢复、符号同步等问题，实现起来较为复杂。
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