frequency channel的例句大全

In high mobility OFDM systems, wireless channel becomes fast time-variant frequency selective channel.

在高速移动环境下，信道变成了快时变的频率选择性衰落信道。

Moreover, it can transmit data at a high speed in the frequency selective fading channel. However, one problem of OFDM lies in the big Peak-to-Average Power Ratio ( PAPR), which leads to intermodulation distortion of OFDM signals and degradation of systematic functions.

然而，OFDM系统中最主要的问题之一在于OFDM信号的峰值平均功率比（PAPR）很大，容易导致OFDM信号的交调失真和系统性能的下降，这就限制了OFDM技术的广泛应用。

Generally the channel is both frequency selective and time selective.

一般的，信道既是频率选择性的又是时间选择性的。

In this paper, a space-time processing receiver for WCDMA is presented for the uplink over the Gaussian channel and frequency selective Rayleigh fading channel.

本文针对处于加性高斯白噪声和频率选择性多径衰落信道下的WCDMA系统，提出一种空时处理的接收方案。

In speed control channel, output of current controller is used as slip frequency, which inherits the advantage of former slip frequency control strategy.

在转速通道中，电流调节器的输出作为转差频率，继承了标量型转差频率控制方案的优点。

The Fading Duration Distribution of Reflection Signals on High Frequency Ionospheric Channel

高频电离层反射信号衰落持续期分布

according to ( european cooperation in the field of scientific and technical research) cost 207, modeling of the frequency selective fading channel which results from the time variation and delay spread of transmission was analyzed.

根据欧洲科学与技术研究协会207工作组标准，讨论了由信号传输的时延和时变性引起的频率选择性衰落信道的建模方法；

Multiple Input Multiple Output ( MIMO) antenna is a typical spatial diversity technique, by combining multiple antennas space-time block coding with orthogonal frequency division multiplexing ( OFDM) forming space-frequency block coding, In multipath channel fading conditions, which also can get additional frequency diversity gain.

多输入多输出天线既是一种空间分集技术，将多天线中的空时分组编码与正交频分复用技术相结合构成空频分组编码，在多径衰落信道条件下还可以获得额外多径分集增益。

How to get the real time channel frequency response in power line OFDM communications by use of the characteristics of power line channel is discussed. The method has been evaluated by an experiment and proved efficient and effective.

文中介绍了利用电力线信道的性质，在OFDM通信中实时获得信道传输特性函数的方法，并通过实验证实了该方法的有效性。

This paper goes into the application of the GaAs Dual-Gate FET to the high frequency tuning-amplification and frequency conversion in a TV UHF channel selector and gives some experimental results.

本文讨论了砷化镓双栅场效应管在电视接收机UHF频道选择器中作高频调谐放大和变频应用时的一些考虑，并给出有关的实验结果。

During the procedure, from PN code domain, spatial domain, temporal domain and frequency domain, the method can simultaneously suppressed the MAI, ISI and Doppler frequency interference in the channel, which greatly improved the interference suppression ability of smart antennas.

在算法处理过程中，可同时从码域、空域、时域和频域对信道中的多址干扰、符号间干扰和多普勒频率干扰进行抑制，大大提高了智能天线抗干扰性能。

Orthogonal Multi-Carrier Modulation ( OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.

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。

Nakagami channel is a channel model with great flexibility and MQAM ( M-ary quadrature amplitude modulation) has a highly frequency efficiency.

Nakagami信道是一种适应性较强的信道模型，MQAM（M-ary quadrature amplitude modulation）是一种频谱利用率较高的调制方式。

In this paper the measurement algorithm of a multifunctional microcomputer power parameter transducer is presented. The errors of instrumentation, which includes the phase-locking synchronization error, the channel transfer error, the CT nonlinearity error, frequency alias error and phase error, are analyzed.

本文介绍了一种交流采样综合电量变送器的测量算法和设计技术要点，分析了仪表的误差来源：通道传输误差、电流互感器非线性误差、相位误差和频率混叠误差。

Wireless signal propagated in the wireless channel will be affected by multi-path time delay spread, Doppler shift, angular spread and other characteristics of multi-path fading, leading to the received signal distortion in amplitude, phase and frequency.

无线信号在无线信道中传播，容易受到多径时延扩展、多普勒频移、角度扩展等多径衰落特性影响，导致接收信号在幅度、相位和频率上失真。

Comparing with the existing synchronization algorithms based on the interspersed pilots, this algorithm utilizes the channel estimation results, and is able to eliminate the time and frequency synchronization bias caused by the dispersive wireless channel.

和已有的基于内嵌导频子载波的时间和频率同步算法相比，该算法充分利用了信道估计的结果，消除了时变信道对时间和频率同步带来的偏差，达到了更好的同步性能。

The enemy never monitors your radio frequency until you broadcast on an unsecured channel.

在你应用不平安的频讲宣布之后，敌人都不会监听你的有线电频次。

This paper takes the connection matrix to express geometric configuration of complex power system network, and provides new definitions of generalized frequency re-usefulness and generalized frequency re-useful channel group.

本文采用图论的关联矩阵表示电网复杂的几何拓朴结构，并提出广义的频率重复使用和频率复用通道集合，即频率复用方阵的新概念。

the matlab ( matrix laboratory) simulate tool is used to evaluate the performance of the bad channel prediction scheme and frequency hopping sequence transform scheme, and the simulation results are compared and analyzed.

本文使用MATLAB仿真器对所提出的坏信道预测方案及跳频序列转换方案进行仿真验证，并分别对仿真结果进行分析与比较。

This paper goes into the application of the GaAs Dual-Gate FET to the high frequency tuning-amplification and frequency conversion in a TV UHF channel selector and gives some experimental results.

本文讨论了砷化镓双栅场效应管在电视接收机UHF频道选择器中作高频调谐放大和变频应用时的一些考虑，并给出有关的实验结果。