信号衰落

针对强湍流信道下信号衰落的特点，分析了对数正态分布模型与K分布模型的适用范围。

Applied fields of log-normal distributed model and K-distributed model were analyzed for the signal fading over strong turbulence .

由于无线网络中存在高误码、信号衰落、切换等原因，使得传统TCP的应用受到了挑战。

The application of TCP over wireless networks is a challenging work due to high bit error rates and fading and handoff .

雨衰是导致Ka频段（20/30GHz）卫星链路信号衰落的主要原因。

Rain attenuation is the dominant cause of leading up to the signal degradation in satellite links operation at Ka - band .

结果表明，FRM对于消除偏振诱导信号衰落现象有显著效果。

The results show that the FRM have a significant effect for the elimination of the polarization induced signal fading phenomenon . 3 .

从马尔可夫链的转移概率矩阵出发，确定了数字相环（DPLL）的稳态相位误差，用同样的方法计算了输入信号衰落时的瞬态响应。

From the matrix of transition probabilities of the Markov chain , the steadystate phase error of the DPLL is determined , and in the same way the loop 's transient response calculated for a fading input .

提出了基于谐波分析的相位补偿法，用以解决光纤Michelson弱磁传感器中由于环境因素如温度变化等引起相位漂移带来的输出信号衰落问题。

A new method to compensate the phase shift in fiber optic Michelson interferometric weak magnetic sensor based on harmonic analysis is proposed to solve the signal fading problem of the sensor that arises from environmental effects such as ambient temperature fluctuations .

介绍了BCCH载波与TCH载波的频率配置、信号衰落算法、干扰原理、动态功率控制的调节思路，以及提高网络质量，改善小区登陆与切换性能的措施。

I introduce the frequency allocation between BCCH carrier frequency and TCH , signal fading arithmetic , interference theory and the adjusting thinking of dynamic power control . Also I introduce the method of the improving network quality and the cell login and the handover performance .

该系统抑制了偏振诱导的信号衰落，实现了稳定的直流磁场信号检测。

The system can prohibit the fading of polarization induced signals .

高频电离层反射信号衰落持续期分布

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

电离层不同传播模式信号衰落特性的实验研究

Experimental Study on the Fading of Ionospheric Echoes of Different Propagation Mode

消除干涉型光纤传感器信号衰落的新方法

A New Method to Eliminate the Signal Fading of Interferometric Fiber Optic Sensors

多径传播会引起信号衰落，并影响无线信道的性能。

Multipath propagation can cause fading , and affects the performance of wireless channel .

提出了一种在有固定中继的锋窝网络中使用信号衰落差值进行移动定位的方案。

This paper proposed a positioning scheme based on differences of signal fading in cellular system with fixed relays .

因此干涉传感系统会产生干涉现象不稳定、输出信号衰落的现象，从而导致系统测量精度下降。

Therefore interference will produce interference sensing system instability , decline of output signal , results in degraded accuracy .

现在，随着移动终端运动速度的增大，研究无线通信系统在高速移动环境的应用已成为一个热点，研究如何克服无线信号衰落和多普勒频移的影响成为技术人员重要的攻关课题。

So the research on how to conquer the influence of Signals Fading and Doppler Effects becomes the most important study to our researchers .

其次对干涉型光纤传感器检测中如何消除由相位随机漂移引起的信号衰落进行了研究。

Secondly , the DC phase-tracking small-signal detection method to eliminate the signal fading caused by random phase-shift in interferometric fiber-optic sensor is studied .

自适应的根据信号衰落调整发送功率和速率能够使得好的信道条件得到充分的利用。

Adapting to the signal fading allows the channel to be used more efficiently since power and rate can be allocated to take advantage of favorable channel conditions .

星地激光通信中，发射机对准误差及大气湍流会引起接收信号衰落，对带前置光放大的阵列接收机，分析了分布式接收阵列的抗衰落性能。

Pointing error of transmitter and atmospheric turbulence cause signal fading for satellite-to-ground laser communication , and the anti-fading characteristics of distributed ground-based array receiver with optical preamplifiers are analyzed .

海洋水声信道是一种极其复杂多变的时-空-频变信道，信道通带窄、多径干扰强、信号衰落严重是水声通信中信息高速可靠传输的主要障碍。

Ocean channel is such a complex environment that it varies in space , time and frequency . Narrow band , multipath and fading are the three main obstacles in reliable high data rate communication .

在移动通信中，移动终端的高速运动会引入严重的信号衰落和多普勒频移，其所造成的影响是制约移动通信系统提高服务质量的瓶颈。

In Mobile-Telecommunication System , the high speed movement of mobile-terminals will introduce fading phenomena and Doppler Shifting of Frequency , which will badly affects the quality of mobile-telecommunication and restricts the development of telecommunication .

抖动噪声的模型以指向系统设计为基础，用以描述信息发送过程中由于指向偏差引起的信号衰落和偏差的起伏引起的抖动噪声。

Based on the design of PAT ( pointing , acquisition and tracking ) system , the model of the jitter noise focuses on the fading process caused by the jitter deviation on the information transmission .

由于无线传输受到信号衰落和噪声的影响，为了实现高数据速率和高业务质量，要求采用新技术来提高频谱效率和改善链路可靠性。

Because of the affection of noise and signal fading , in order to high data rate access and high quality , wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency .

实验表明，该方法可有效抑制传感器信号衰落，获得稳定的输出信号，其偏离正交工作点的相位可稳定在±3范围内。

Experiments prove that the phase departing from quadrature point ranges from - 3 ° to + 3 ° while the sensor 's output signal keeps stably , which means the signal fading problem is solved effectively .

该技术从根本上避免了光源频率、光强的波动，及光在传输过程中由系统带来的损耗、光的偏振方向的改变引起的信号衰落问题。

The OFS of this kind avoids the fatale signal fading problem in whole coherence OFS , which is caused by the fluctuation of source wavelength and power , power loss in propagation , as well as the changes of polarization direction .

CDMA信号在衰落信道中的低复杂性盲多用户检测

Low-complexity Blind Multiuser Detection of CDMA Signals in Fading Channels

QPSK信号多径衰落信道的建模与误码率仿真

Modeling and BER Simulation of QPSK Signal Multipath Channel

GMSK信号在衰落信道中的频偏盲估计

Blind estimation of frequency offset for GMSK modulation in fading channel

MMDS图像信号传输衰落分析及抗衰落参数计算

The Analysis of MMDS Image Signal Transmission Eclipse and Eclipse Counterwork Parameter Count

针对空间白噪声环境下的DS-CDMA系统，对信号无衰落和信号经历衰落时次优合并方式码捕获的检测性能进行了理论分析和仿真。

Detection performance of the STC with suboptimum combining is theoretically analyzed and also simulated for DS-CDMA systems in additive white Gaussian noise environment .

由于室内环境存在多径干扰，使得发射信号产生衰落，室内信号的衰落主要在路径损耗和多径损耗上，为此研究UWB的室内信道成为必要。

There is multipath interfere in Indoor condition lead to decline and the decline mainly in path loss and multipath loss , so it 's necessary to study the channel models .