按比例衰落；平落，平衰减
- Typical examples of modeling flat fading channels in MATLAB were simulated specifically by means of user-defined m-files.
另外重点通过自定义Matlab环境下的M文件对无线信道的典型例子，即平坦衰落信道进行了仿真。 - This paper presents a baseband discrete-time state-space model for generation of Rayleigh MD ( multiplicative distortion) in a frequency flat fading channel.
本文首先提出了在插入无调制片和匹配滤波接收机条件下，频率衰落信道的瑞利乘性畸变的简单基带离散模型。 - By means of user-defined m files in MATLAB modeling typical flat fading channel such as rician fading channel and rayleigh fading channel are derived, comprising with and without doppler shift.
首先解释移动信号多径传播和因此造成的衰落的基本特性，然后重点对常见的瑞利衰落和莱斯衰落进行仿真。 - Algorithm for modulation recognition in Rayleigh flat fading channel
瑞利平坦衰落信道中的调制识别算法 - The design of Turbo-codes in flat fading channel is provided, and the effects of channel characteristics on Turbo-codes are analysed.
针对慢衰落信道的特点，提出了在衰落信道中Turbo码的构造方法；分析了慢衰落信道特性及其对Turbo码性能的影响； - 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.
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。 - This paper employs the tapped delay line channel model for frequency-selective fading channels to extend a frequency offset blind estimation algorithm based on cyclostationary, which is proposed for flat fading channels, to frequency-selective fading channels. Simulations proves the feasibility of this extension.
根据频率选择性衰落信道的抽头延迟线模型，将针对平坦衰落信道的CS（周期平稳过程理论）频偏盲估计算法扩展到了频率选择性衰落信道，并通过仿真证明这种扩展是可行的。 - We first focus our discussion on signaling and detection over flat fading MIMO channels.
本文首先讨论了平衰落信道中的信号处理及检测技术。 - The proposed technique utilizes orthogonal frequency division multiplexing ( OFDM) transforming a frequency selective fading channel into multiple flat fading sub-channels.
应用正交频分复用技术的基本原理，把一个频率选择性衰落信道转换成了多个并行平坦衰落信道。 - Performance Compare of the Relationship between ML and MAP Channel Estimation with Pilot Symbol Length in the Flat Fading Channel
平衰落信道下ML和MAP信道估计与导频符号长度的关系性能比较 - We present the general principles of combining CT-TCM with ACM techniques designed for flat fading channels. We then apply these techniques to a spectrally efficient adaptive coded modulation to obtain the CT-TCM adaptive coded modulation system.
文中给出了将CT-TCM码与平坦衰落信道中的自适应编码调制技术相结合的基本原则，并将这些原则应用于频谱利用率自适应调制系统，得出了CT-TCM自适应编码调制方案。 - A novel channel modeling of V-BLAST systems under frequency selective fading channel is proposed in this paper, extending researches of V-BLAST systems from flat fading channel to frequency selective fading channel.
首次提出了一种频率选择性信道下的V-BLAST系统的信道建模方式，成功地将V-BLAST系统的研究从平坦信道扩充至频率选择性信道。 - Spatial Signature Estimation Algorithm in Flat Fading Channel and Its Application to Space Division Multiple Access
平衰落信道中的空间特征估计算法及其在空分多址中的应用 - When the channel is frequency selective fading, the optimization objective is to maximize system instantaneous communication rate. When the channel is frequency flat fading, the optimization objective is to maximize instantaneous output SNR.
当信道为频率选择性衰落时，优化目标为最大化系统瞬时可靠通信速率；当信道为频率平坦性衰落时，优化目标为最大化系统瞬时输出信噪比。 - Then, the paper starts form the studies of pilot channel estimation algorithm under flat fading channel, and next, researches and studies pilot channel estimation algorithm under the time varying channel.
然后，本文从平坦衰落信道下的导频信道估计算法的研究出发，对时变信道下的导频估计算法进行研究和探讨。 - Through the frequency diversity technology of OFDM, frequency-selective fading channel can be converted into frequency flat fading channel, which can effectively overcome the inter-symbol interference. It is considered the key technologies for the next generation of mobile communication.
通过OFDM技术的频率分集技术，将频率选择性衰落信道转化为频率平衰落信道，有效地克服了符号间干扰，被认为是未来新一代移动通信的备选关键技术之一。 - OFDM technology can make the frequency selective fading channel into a group of orthogonal flat fading channel to overcome the impact of multipath fading.
OFDM技术可以把频率选择性衰落信道转化成一组正交的平坦衰落信道，来克服多径衰落的影响。 - OFDM technology can decompose the frequency-selective fading channel into a group of orthogonal flat fading channel, therefore, it could be applied to the MIMO system for overcoming the impact of multipath fading.
OFDM技术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，可以将OFDM技术应用到MIMO系统中来克服多径衰落的影响。 - In recent years, MIMO technology has been well-documented on the assumption that the channel is independent and identically distributed Rayleigh flat fading channel.
在MIMO技术研究中，通常假定信道经历独立同分布的Rayleigh平坦衰落，取得了广泛的研究成果。 - Signal bandwidth is less than channel bandwidth, so each sub-channel can be seen flat fading channel, then ISI can be eliminated.
每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。 - The combination of MIMO and OFDM greatly increases the system capacity in the sense that OFDM and MIMO can respectively provide flat fading channel and spatial gain.
多天线和OFDM的结合极大地提高了系统容量，OFDM能为系统提供平坦衰落信道，而多天线则提供空间增益。 - The Orthogonal Frequency Division Multiplexing ( OFDM) technology decomposes the channel into multiple orthogonal sub-channels and transforms frequency selective multi-path fading channel to flat fading channel, it effectively reduces the affect of multipath fading.
正交频分复用（OFDM）技术通过将信道分解为多个正交子信道的方法实现了频率选择性多径衰落信道向平坦衰落信道的转化，有效地减小了多径衰落的影响。 - Orthogonal Frequency Division Multiplexing ( OFDM) can divide a frequency selective fading channel into a number of parallel flat fading channels. This technology can overcome the adverse of multi-path effects, and achieves high spectral efficiency.
正交频分复用（OFDM）技术可以将频率选择性衰落信道划分为多个并行的平坦衰落信道，有效地克服了多径带来的不利影响，并且具有很高的频谱利用率。 - Although the whole bandwidth may subject to frequency selective fading, each sub-band undergoes flat fading.
虽然整个频带上可能遭受频率选择性衰落，但是在每一个子带上可被看作是平坦性衰落。 - Introduce the model of space-time coding technique and the design criterion over the flat fading channel. Study three kinds of coding schemes of space-time code: space-time block code, threaded layered space-time code, layered block space-time code. 3.
介绍了空时编码的系统模型，以及平坦衰落信道下的空时编码设计准则；详细论述了三种类型的空时编码方式：空时分组码、空时网格码和分层空时码。 - A simulation flow for indoor multiple-antenna flat fading channels is summarized, and the simulation method for the frequency selective fading channel is briefly introduced.
总结了室内多天线平坦衰落信道的仿真流程，简单地介绍了频率选择性衰落信道的仿真方法。 - OFDM can resist frequency selective channel by converting it to flat fading channel in frequency domain. MIMO can use the space-multiplexing diversity efficiently to boost the system throughput.
OFDM技术将频率选择性衰落信道在频域上转换为平坦衰落信道，可以有效的对抗多径衰落的影响；MIMO技术利用空间复用增益能够有效的提高系统的传输速率。 - The major contributions of this thesis include the following three aspects. ( 1) LQG control of linear stochastic systems with fading channels is discussed, where the system outputs are assumed to be amplified and transmitted to the controller over a Rayleigh flat fading channel.
具体来说，主要获得了以下三方面的研究成果：（1）讨论了具有信道衰落约束的线性随机系统的LQG控制问题，其中系统输出经放大后通过瑞利平坦衰落信道传输到控制器。 - Frequency elective fading channel can be changed into flat fading channel by OFDM technique.
OFDM技术可以将频率选择性衰落转化为平坦衰落。 - OFDM is a technology of high rate data stream transmission, which can convert the frequency selective fading channels to a number of parallel flat fading channels to reduce the effects of multipaths fading.
OFDM技术可以传输高速数据流，它通过将频率选择性多径衰落信道转换为多个并列的平坦信道，减少了多径衰落的影响。