A two-ray model is used for the frequency selective fading channel.
频率选择性衰落信道采用了两径模型。
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。
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 new coded strategy can achieve full space-time-frequency diversity over frequency selective fading channel.
在频率选择性信道中，新编码策略可以获得空时频全分集增益。
Introduce the basic principles of OFDM and his particular mechanism used to counteract frequency-selective fading.
介绍了OFDM系统基本原理，以及OFDM系统对抗多径衰落的机制。
A combined channel estimation method of time-frequency-selective fading channels in MIMO-OFDM systems was proposed.
提出了一种适用于时间频率选择性衰落信道的MIMO - OFDM系统的组合信道估计方法。
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。
This paper explores the decoding problem of the MC V-BLAST system under the downlink frequency-selective fading environment.
该文着重研究MCV - BLAST系统在下行频率选择性衰落环境中的解码问题。
In this paper, a blind multiuser receiver for frequency-selective fading channel based on subspace tracking has been presented.
提出一种基于信号子空间估计，用于频率选择性衰落信道的盲多用户自适应接收机。
In high bit-rate systems it appears as severe selective fading, whereas it has no significant influence on low bit-rate systems.
这种干扰在微波高速数字系统中表现为严重的选择性衰落，但对低速系统无明显影响。
Therefore, system acquisition performance can be improved if diversity receiver is adopted for the frequency-selective fading channel.
因此在频率选择性衰落信道中，采用分集接收可以改善系统的捕获性能。
This new scheme has the advantages of high spectrum efficiency and suppression of multipath spread, frequency selective fading, jamming and noise.
该体制具有较高的频率利用率，可有效地抑制短波信道中多径时延、频率选择性衰落、人为干扰与噪声带来的不利影响。
In this thesis, we study equalization techniques for OFDM over the frequency selective fading channel and doubly selective fading channel respectively.
本文的研究内容就是频率选择性衰落信道和双衰落信道下的OFDM信道均衡技术。
A new transmission scheme, which combines transmit preprocessing with multiuser MIMO downlink system over frequency-selective fading channel is proposed.
提出了一种适用于频率选择性衰落信道，新的下行多用户MIMO系统预处理传输方案。
The biggest merit of OFDMA is the ability to resist frequency - selective fading, simultaneously can raise the frequency spectrum efficiency effectively.
OFDMA的最大的优点是能够抵抗频率选择性衰落，同时能够有效地提高频谱效率。
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。
In digital microwave communication mode, the waveform distortions caused by frequency-selective fading are the main cause of the propagation quality deterioration.
在数字微波通信方式中，频率选择性衰落引起的波形失真成为传输质量恶化的主要原因，但没有统一的评价方法。
In the future broadband wireless communications, there will be two severe challenges to be faced, which are frequency selective fading channels and bandwidth efficiency.
在未来宽带移动通信中，存在两个最严峻的挑战：多径衰落信道和带宽效率。
The tapped delay model of the multi-path frequency selective fading channels as well as the diversity receiver technique is introduced, and the principles of RAKE receiver are described.
本文首先讨论了移动通信信道的各种参数对信道估计的影响，介绍了频率选择性信道的抽头延迟线模型和分集接收技术，在此基础上阐述了RAKE接收机的原理。
In addition, there will be frequency selective fading in the future broadband MIMO wireless communication systems, and the traditional high-performance equalizer will become extremely complicated.
另外在未来宽带MIMO无线通信系统中，通常面临频率选择性衰落信道，传统高性能均衡器就会变得异常复杂。
The problems of carrier frequency offset estimation under the condition of the AGWN channel, frequency flat-fading channel and frequency selective-fading channel are studied in detail respectively.
本文仔细研究了在高斯白噪声信道下、频率平坦衰落信道下和频率选择性衰落信道下高精度估计信号载频偏差的问题，并对相应算法提出了一些改进办法。
The problems of carrier frequency offset estimation under the condition of the AGWN channel, frequency flat-fading channel and frequency selective-fading channel are studied in detail respectively.
本文仔细研究了在高斯白噪声信道下、频率平坦衰落信道下和频率选择性衰落信道下高精度估计信号载频偏差的问题，并对相应算法提出了一些改进办法。
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