前者是通过对载波信道的频率特性时变性测试、分析，实现信号平稳传输。
The former realizes steady transmission of signal by testing and analysing the carrier channel's frequency characteristic .
电力线载波通信是配网自动化中一种经济、简便的数据传输方式。
Power line carrier is an economic and convenient data transmission technology used in distribution automation system.
有线遥控是通过专用电缆或动力线作为载波体，对信号用调制解调器传输方式，达到只用少量通道即可实现控制的方法。
Wired remote control is a dedicated cable or power line as a carrier, the signal with modem transmission mode, to achieve a small number of channels can be used to control the method.
该改进方案改善了电力线载波通信系统的传输性能。
It can improve the transmission performances of power line carrier wave communication systems.
电力线是一种分布广泛的载波网络，如何利用它实现信息传输，尤其是利用它解决“最后一公里”问题是现阶段网络构建方面研究的热点。
The power-line is a widely distributed carrier, how to use it to transmit information, particularly to solve the "last kilometer" problem is the hot spot of network building.
对测量的数据进行调制，通过载波线路或电话线进行远距离传输。
Also it can modulate measured data and perform remote transmission via carrier line and telephone wire.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
提出了一种新的正交频分多路（OFDM）传输系统定时和载波频率捕获联合算法。
This paper describes a novel joint acquisition algorithm of timing and carrier frequency for burst orthogonal frequency division multiplexing (OFDM) transmission system.
与传统的单载波调制方式相比，OFDM技术可以有效地抵抗信道多径干扰，提高系统的传输速率。
Compared with the traditional scheme of single-carrier modulation, OFDM technology has more effective anti-jamming ability and achieves higher transmission rate.
它先将原始数据流复制成多路并行数据，经频域扩频和时域扩频，再调制到互相正交的子载波上传输。
It copies the original data stream to several parallel data streams, spreads them in both time and frequency domain, then modulates them to orthogonal sub-carriers for transmission.
在智能家居控制系统中有很多种信号传输方式，在电力线载波方式中应用X-10协议进行信号传输是最先进也是最实用的一种。
The signal transmitted methods have many kinds in smart-house control system, using X-10 protocol transmitting signal in power-line carrier wave application is most advanced and practicality method.
在三大标准中atsc为单载波传输系统，能较好支持固定接收，峰均值比较小。
In three standards, ATSC is the single carrier transmission system, it is easy to support the fixed receiving, its peak average value quite being small.
它结合了OFDM和CDMA的优点，在高速数据传输时，其抗符号间干扰的性能明显优于传统的单载波cdma系统。
It combines the advantages of OFDM and CDMA, and its capability of combating ISI is obviously better than that of a single-carrier CDMA for the high data rate transmission.
数字传输系统的关键在于载波同步和信道均衡。
The key of digital transmission system lies in carrier synchronization and channel equalization.
在OFDMA中，相临的多个子载波被分配给不同的用户来为用户并行低速传输数据。
In OFDMA, closely spaced multiple subcarriers are assigned to different users for parallel data transmission.
公开一种在多输入多输出(MIMO)单载波频分多址(SC -FDMA)系统中用于执行上行链路传输的方法和设备。
A method and apparatus for performing uplink transmission in a multiple-input multiple-output (MIMO) single carrier frequency division multiple access (SC-FDMA) system are disclosed.
提出了多载波码分多址测控通信系统的概念。该系统不但能完成伪码精确测距，而且能进行高速数据传输。
This paper puts forward the concept of MC CDMA system, that can both measure distance accurately with PN code and transmit High speed data.
该方案利用频移键控频分复用（FSK FDM）技术进行声频副载波调制，通过光强度调制实现远程在线EDFA监控信息随主信号的传输。
In the scheme, FSK-FDM technique is used in subcarrier modulation, and the EDFA's supervisory information is transmitted by optical intensity 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。
To avoid excessive transmission distortion, the bandwidth between transmitter and receiver must be at least twice that with digital carrier modulation.
此外，在低压电力线载波通信中，存在着通信传输距离有限的问题。
In addition, in the communication of low power line carrier exists the problem of the transmitted distance of communication.
采用综合的分析方法从理论上分析了适合于微波副载波传输的谐振式光接收机前端的特性，提出了一整套计算公式。
An general analysis for front end performance of turned optical receiver for microwave subcarrier multiplexed lightwave system was presented. Formulas for front end circuits were deduced.
在电力载波技术的应用中，信号干扰和衰减是影响信号传输的重要原因。
In powerline carrier wave application, signal disturbing and signal attenuation is the important reason of effecting signal transmission.
他是较为完备的移动接收和传输技术，可以大大降低每个子载波内的符号间干扰，节省了用于均衡的系统开销。
It is a mature receiving and transmitting technique, which can lower the interference of symbol in each carrier and economize the system expense used for balance.
理论推导和仿真结果表明，COFDM调制技术适合在高压电力线载波通信中使用，在明显的提高数据传输率的同时降低误码率并增强系统可靠性。
Proved by the theoretic deriving and simulation result, the COFDM modulation technology is well suitable for high voltage PLC with a high transmission speed, low BER and high reliability.
为了解决水文巡测设备中数据传输的可靠性，电力载波通讯中的单频阻波器技术被应用到巡测设备上。此法简单易行，稳定可靠。
Single - frequency resistance - wave technique has been introduced from power - driven carrier wave communication to patrol - measurement, thanks to its easy manipulation and stable reliability.
并用这种理论应用在载波相位测量的改进上，以降低模糊度确定的复杂性，或用于时间传输技术。
This paper developed a new approach to improve GPS carrier phase measurement, for the purpose to reduce the ambiguity integer value or use it in time transfer technology.
用于无线电传输时，信号用载波传送，通过改变(调制)载波的振幅、频率或间隔来实现。
FOR radio transmission, inFORmation is imparted to a carrier wave by varying (modulating) its amplitude, frequency, or duration.
以电能表系统为中心，通过其载波接口，三表数据以低压电力载波方式传输到区内集中器。
The power meter is designed to have the carrier interface through which the three meter's data is transmited into the concentrator by the way of low power line carrier.
通过研究有效的无线资源分配策略，可以提高多载波系统的传输性能。
Through the study of efficient allocation strategy, the performance of multi-carrier system can be improved.
通过研究有效的无线资源分配策略，可以提高多载波系统的传输性能。
Through the study of efficient allocation strategy, the performance of multi-carrier system can be improved.
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