The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
If the time interval among the transmissions is long enough for each time, the fading presented by the transmission of the signal will be mutual for each time.
如果各次发送的时间间隔足够大，那么各次发送信号所出现的衰落将是彼此的。
Time-selective Rayleigh fading of channels is caused by Doppler shift and carrier frequency offset.
接收端的高速运动或者载频的偏移，会引起信道的时间选择性衰落。
It is a true blind detection algorithm in that it needs no knowledge of channel fading information as well as time domain and frequency domain spread spectrum codes.
该算法无需时域扩频码、频域扩频码和信道衰落信息，是一种真正意义上的盲的检测算法。
The mean acquisition time of the FSASE method is derived by the generating function flow graph technique for the fading channel.
文中采用生成函数流图法推导出了衰落信道下FSASE算法平均捕获时间的闭式解。
It is the first time to analyze the capacity and throughput performance of PRMA and its variations under cellular environment with Rayleigh fading channel.
首次分析了在多小区瑞利衰落信道中PR MA类协议的容量及通量性能。
The received image is not satisfactory over time-selective fading channel.
数字图像在时间选择性衰落信道下传输，难以获得满意效果。
In this paper, with Rayleigh fading the random characteristics of multipath time delay and Doppler shift in HF ionospheric channels is discussed.
本文在瑞利衰落模型下，研究了高频电离层信道中多径时延与多普勒频移的随机特性。
The time- and frequency- selective fading channel is so-called doubly selective fading channel.
同时具有时间和频率选择性衰落的信道，我们称之为双衰落信道。
The wireless propagation environment is described first: analyzing the small-scaled fading, including amplitude fading, multi-path time delay and Doppler spectrum spread.
在本论文中，首先对移动传播环境作了描述，特别是对小尺度多径传播造成的幅度衰落，多径时延和多普勒频移进行了分析；
Today, the magic is fading fast. It's time to step back and analyze how financial firms actually operate.
今天，魔法正在迅速消失。现在是回过头来分析一下金融公司事实上是如何操作的时候了。
Accurate time delay estimation of overlapping fading multipath components is vital for many systems, particularly for positioning technologies.
多径分量重叠衰落下的精确时延估计对很多系统而言都非常重要，对于定位技术更是如此。
The results of simulation show that space-time block code based on MIMO-OFDM is a highly effective technique against the frequency-selective random fading.
仿真结果表明，将空时编码技术与M IMO-OFDM技术相结合能有效地抵抗频率选择性随机衰落。
The first-event error probability of STC is evaluated, and a new hybrid design criterion of space-time code for time-varying fading channels is proposed based on that probability.
考察了空时码的首事件差错概率，并基于首事件差错概率提出一种新的用于时变衰落信道的空时码混合设计准则。
The performance of space-time channel coding scheme is discussed under a Rayleigh fading channel with spatially correlated fading amplitudes and an additive white Gaussian noise.
主要研究了空时编码系统在相关瑞利衰落信道和高斯噪声环境下的性能。
A new method of unitary space-time constellation, which can improve the influence on block error rate by fast fading, is designed based on a systematic method.
在系统化酉空时星座设计方法的基础上，提出了一种抗信道快变的酉空时星座设计方案。
The light is fading, and it is time for him to eat.
灯渐渐暗了，是他开饭的时候了。
Our once pure and beautiful dream, is gradually fading away with time passing by……
曾经纯真无邪，曾经美丽梦想，随着四季轮回慢慢的散尽……
The wireless channel is usually unreliable, and it mainly suffers from time-varying fading due to multi-path propagation.
它具有由于时变多径传输产生的衰落、时间延迟扩展等有害影响。
A time-varying disperse channel is a channel that contain both frequency selective fading and time selective fading.
时变色散信道则是同时存在频率和时间选择性衰落的信道。
A general space-time CDMA system model in multipath fading channels is built to study how to suppress both multiple access interference (MAI) and multipath fading.
通过建立了一般的空时CD MA系统模型，探讨多址干扰和多径效应的联合抑制问题。
A general space-time CDMA system model in multipath fading channels is built to study how to suppress both multiple access interference (MAI) and multipath fading.
通过建立了一般的空时CD MA系统模型，探讨多址干扰和多径效应的联合抑制问题。
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