频率选择性衰落信道采用了两径模型。
A two-ray model is used for the frequency 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 time- and frequency- selective fading channel is so-called doubly selective fading channel.
经过调制产生了两个频段的射频信号，具有抗频率选择性衰落的优点。
The system can generate two frequencies, which will decrease frequency selective fading effect.
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。
Therefore, system acquisition performance can be improved if diversity receiver is adopted for the frequency-selective fading channel.
其次，我们对适合频率选择性衰落信道的空频码提出了一些独创性的想法。
We derive the condition of the space-frequency codes to achieve maximum achievable diversity gain.
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 this paper, a blind multiuser receiver for frequency-selective fading channel based on subspace tracking has been presented.
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。
In this thesis, we study equalization techniques for OFDM over the frequency selective fading channel and doubly selective fading channel respectively.
技术可以和OFDM技术结合以便在高的频率选择性衰落信道下提供高数据率的传输。
V-BLAST (Vertical Bell Laboratories Layerd Space-Time) can be combined with OFDM to achieve high data rate transmission in frequency selective fading channels .
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 biggest merit of OFDMA is the ability to resist frequency - selective fading, simultaneously can raise the frequency spectrum efficiency effectively.
他能有效地对抗多径效应，消除符号间干扰，对抗频率选择性衰落，而且信道利用率高。
It can waken the multipath effect availably, eliminate symbol interference and fight against frequency select fading. Moreover, the channel utilization rate is high.
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。
This paper explores the decoding problem of the MC V-BLAST system under the downlink frequency-selective fading environment.
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。
A new transmission scheme, which combines transmit preprocessing with multiuser MIMO downlink system over frequency-selective fading channel is proposed.
算法所用特征对平坦衰落信道具有衰落不变性，对频率选择性衰落信道也具有很强的抗多径能力。
The feature used in the algorithm is invariant with respect to flat fading, and can resist multipath fading of frequency-selecting channel in quite a few degree.
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 combined channel estimation method of time-frequency-selective fading channels in MIMO-OFDM systems was proposed.
本文主要研究了基于训练序列的多输入多输出（MIMO）时变频率选择性衰落信道的估计与跟踪问题。
The problem of channel estimation and tracking for MIMO time-varying frequency-selective channels is investigated based on training sequences.
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。
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.
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 digital microwave communication mode, the waveform distortions caused by frequency-selective fading are the main cause of the propagation quality deterioration.
在宽带无线数字通信系统中，影响信息高速传输的最主要的一类干扰是由信道的多径效应所引起的频率选择性衰落。
The bandwidth efficiency and ability to combat the effects of frequency selective channels are critical issues in the design of wideband wireless digital communications system.
正交频分复用(OFDM)技术能够有效的对抗无线信道的频率选择性衰落，成为无线通信领域的另一个研究热点。
Orthogonal frequency division multiplexing (OFDM) can effectively combat the multipath fading of wireless channels and has become another hot point in the area of wireless communications.
算法所用的小波变换相位信息特征对平坦衰落信道具有衰落不变性，对频率选择性衰落信道也具有很强的抗多径能力。
The phase information of wavelet transform used in the algorithm is invariant with respect to flat fading, and can resist multipath fading of frequency-selecting channel in quite a few degree.
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。
This new scheme has the advantages of high spectrum efficiency and suppression of multipath spread, frequency selective fading, jamming and noise.
给出了该方案的OFDM系统仿真结果，验证了OFDM信号的白噪声特性和OFDM通信系统较强的抗频率选择性衰落特性。
Finally the simulating result is presented, which validates white noise characteristic of the OFDM signal and the characteristic of anti-attenuation of frequency-selected of OFDM communication system.
OFDM技术可以把频率选择性衰落的信道转化成一组正交的平坦衰落的信道，因此可将OF DM技术应用在MIMO系统中来克服多径衰落的影响。
OFDM has the ability of transforming the frequency-selective channel into a collection of parallel flat-fading subchannels and therefore can be adopted in MIMO systems to combat multi-path effects.
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.
研究了频率选择性瑞利衰落信道中的同步MC-CDMA系统上行链路空时信道估计及多用户检测算法。
The space-time channel estimation and multiuser detection algorithm for the uplink of multicarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel were investigated.
该文研究在频率选择性瑞利衰落信道中MC-CDMA系统的盲空时干扰抑制。
This paper investigates blind space-time interference suppression for MultiCarrier CDMA (MC-CDMA) system in frequency selective Rayleigh fading channel.
该文研究了频率选择性瑞利衰落信道中的异步ds - CD MA系统盲多用户检测。
This paper investigates blind multiuser detection for asynchronous DS-CDMA in frequency selective Rayleigh fading channel.
对在多用户和频率选择性瑞利衰落环境下的下行链路的误比特率性能进行了仿真，其结果表明系统是可行的。
The simulation of error bit rate performance for multi -channel and frequency -selective Rayleigh fading is carried out, and the simulation results show that the system is.
对在多用户和频率选择性瑞利衰落环境下的下行链路的误比特率性能进行了仿真，其结果表明系统是可行的。
The simulation of error bit rate performance for multi -channel and frequency -selective Rayleigh fading is carried out, and the simulation results show that the system is.
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