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单频信号经过多径时变信道后，输出信号的包络随时间随机起伏，输出信号的频谱从冲激谱变成一个窄带频谱。径数位20，变化频率从0—2HZ随机均匀抽取。-Single-frequency signal through time-varying multipath channel, the output signal envelope random fluctuations over time, the output signal from the impulse of the spectrum into
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对时变的具有码间串扰ISI的信道，进行信道估计,改善了系统的性能-With the code of the time-varying inter-channel crosstalk ISI to carry out channel estimation and improved the performance of the system
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时变系统的频谱扩展，（信道是平坦的）仿真结果为：滤波后高斯过程的功率谱密度和由滤波器产生的相关高斯序列的时域值-Time-varying system, spread spectrum, (the channel is flat) simulation results as follows: the filtered Gaussian process power spectral density and produced by the filter related to the value of
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基于MATLAB中多径非时变信道仿真与分析，可以实现以下简单信道模型的测试！-MATLAB-based non-time-varying multipath channel simulation and analysis, you can achieve the following simple channel model of the test!
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时变深衰落信道中的自适应均衡技术-Deep fading channel time-varying adaptive equalization......
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通信系统的仿真代码，多径信道的仿真，多径时变的信道仿真。-Communication system simulation code, simulation of multipath channel, time-varying multipath channel simulation.
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《通信系统仿真原理与无线应用》系统地介绍通信系统的设计、分析和仿真方法，还提供了大量极具参考价值的仿真实例。《通信系统仿真原理与无线应用》的全部仿真程序都是采用MATLAB编写的。这不仅方便读者理解仿真的实现过程，还允许读者修改或使用这些代码段来进行自己的仿真开发。章后提供了大量的参考文献和经过精心设计的各类练习题，方便教学。此为中文翻译本。-Principles of Communication Systems Simulation with Wireless Applications is
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Designing spectral e±cient, high-speed wireless links that o® er high quality-
of-service and range capability has been a critical research and engineering chal-
lenge. In this thesis, we mainly address the complexity and performance issues o
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通过仿真和分析对比SCFDMA的性能和算法。This a very simple baseband simulator for SC-FDMA system. This simulator is
part of the upcoming book “Single Carrier FDMA: A New Air Interface for Long
Term Evolution” (Wiley, Nov. 2008) which I co-authored with professor D
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在多径分量数确定的前提下,MIMO-OFDM系统采用传统的基于导频辅助和盲信道估计算法能获得较好性能。实际无线环境中,多径分量数目与幅度都是时变的,则传统信道估计方法不再适用。该文采用随机集理论建模MIMO-OFDM系统信道多径分量数的变化和MIMO信道。基于此模型提出了集中粒子空间重采样方法(CRS),在保留大概率粒子抽样样本的同时主动抛弃小概率抽样样本,以获得更为准确的真实样本逼近。并提出了基于集中重采样Rao-Blackwellised粒子滤波的信道估计方法(RBPFC)。仿真结果表明:所
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信道的频率响应是时变的，设计最佳的固定的解调滤波是不可能的，因此，需要一种能补偿或减少接收信号中ISI的方法，这种ISI补偿方法称为均衡方法。
自适应均衡技术能够用来抵消由于信道带限或时间色散所导致的码间干扰，可以使通信系统更有效地利用信道带宽。
-Channel frequency response is time-varying, the best fixed design demodulation filter is impossible, therefore, need to
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时变信道下LTE系统基于传输分集的MIMO预编码技术仿真代码，还包括了平坦衰落信道条件下的程序，很值得参考。-Time-varying LTE system is based on channel Transmit Diversity for MIMO precoding simulation code also includes procedures for the flat fading channel conditions , it is worth considering .
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频率同步是宽带OFDM系统中的关键技术，IEEE 802.11a 采用OFDM技术，利用其前导序列的重复结构，提出了一种分步的粗细频偏捕获与校正算法，同时为了补偿时域同步后的残余相差和适应信道的时变特性，还提出了一种基于频域导频的相位跟踪方案-Frequency synchronization is a key technology in the broadband OFDM systems, IEEE 802.11a uses OFDM technology, the use of the r
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mimo_ofdm快速时变的一种低复杂度的检测算法在PDF通道，他涉及MIMO-OFDM的基本知识及应用。-Mimo_ofdm fast time-varying a low complexity detection algorithm in PDF channel, basic knowledge and application he relates to MIMO-OFDM.
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衰落是由于发射机与接收机之间空间位置的微小变化引起的，描述小范围内接收信号场强中瞬时值的快速变化特性，是由多径传播和多普勒频移两者共同作用的结果，包括由多径效应引起的衰落和信道时变性引起的衰落，具有信号的多径时延扩展特性和信道的时变特性-Fading is caused due to a slight change of the position of the space between the transmitter and the receiver, the characteristics
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Abstract-The mobile radio channel can be simulated as a
complex-valued random process with a time-varying variance.
This paper describes an implementation of that process using
a real-time Digital Signal Processing (DSP) technique. The simulato
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IEEE经典论文，Bello于1963年发表的随机时变无线信道。-IEEE classic paper, Bello in 1963 published randomized time-varying wireless channel.
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Vehicular channel is characterized by non- stationarity and doubly selective nature. The term doubly selective implies that they have both time varying and frequency selective behaviour. The material attached here address this features.
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A 2x2 multiple-input multiple-output (MIMO) architecture
using dual-polarized antennas (DPAs) is considered
with orthogonal frequency division multiplexing (OFDM). The
performance of DPAs is evaluated for adaptive polarization
(AP) transmissi
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Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation and multiplexing technique
proposed for 3G, 4G LTE-A systems to achieve higher data rates with better spectral efficiency at low latency. Time
varying nature of the wi
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