time-varying channel

A Method for Time-Varying Channel Parameter Estimation Based on Fractional Fourier Transform

一种基于分数阶傅立叶变换的时变信道参数估计方法

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Performance Analysis and an Improved Receive Algorithm of OFDM Signals in a Time-Varying Channel

OFDM信号在时变信道中的性能分析与改进接收算法

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Time-varying channel can provide time diversity, also known as the Doppler diversity.

时变信道可以提供时间分集，也称为多普勒分集。

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Subsection receiving algorithm of OFDM Signals in a time-varying channel

时变信道中OFDM信号的分段接收算法

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Analyze the robustness of robust two dimensional pilot-symbol-aided channel estimator for the time-varying channel statistics;

分析了鲁棒的二维导频辅助信道估计器对时变信道统计特性的鲁棒性；

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Particle Filtering Based Estimation for MIMO Time-varying Channel

基于粒子滤波的MIMO时变信道估计

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The Application of Wavelet Model in the Blind Estimation of Time-Varying Channel

小波建模在时变信道盲识别中的应用

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Simulation results show that the proposed method has good performance in tracking the time-varying channel.

仿真结果表明，序贯蒙特卡罗算法可以对时变信道进行很好的跟踪。

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With the results above, establish a MIMO-OFDM system model channel based on fast time-varying channel.

然后根据以上的研究结果，建立起基于MIMO-OFDM系统快速时变信道的信道模型。

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A UWA channel model including the time-varying fading, multipath and additive noise is built.

建立了包括时变衰落、多途和加性干扰的水声信道模型。

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Time-varying channel estimation for MIMO-OFDM systems

时变条件下MIMO-OFDM系统中的信道估计算法

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In the dissertation, researching the defects that Peak-to-Average Ratio ( PAR) is high and influenced greatly by frequency offset and time-varying channel in OFDM system, providing the effective settlement measures.

论文针对OFDM技术峰值平均功率比高以及易受频率偏差和时变信道的影响的缺点进行研究，给出有效的解决措施。

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Moreover, this thesis proposes a novel time-varying channel estimation algorithm with optimized pilot pattern.

此外，本文基于优化的导频设计提出一种新的时变信道估计算法。

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Blind Estimation of DOA and Direct Sequence for CDMA Signals in Time-Varying Channel

时变信道中CDMA信号的波达方向和直接扩频序列盲估计

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Wishart random matrix based Bayesian estimation for time-varying channel in the color noise

有色噪声下基于Wishart随机矩阵的贝叶斯时变信道估计

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Firstly, the autoregressive ( AR) models with proper order are used to approximate the time variation of the coefficients of wireless time-varying channel.

我们使用适当阶次的自回归（AR，autoregressive）模型去近似时变瑞利衰落信道，通过一个训练序列的训练过程来建立AR模型参数和获得初始的观测。

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This thesis mainly focuses on the time-varying channel estimation methods based on pilot tones in wireless OFDM systems.

本文主要研究了无线OFDM系统中基于导频的时变信道估计方法。

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Research of Channel Estimation Method for Time-varying Channel in OFDM System

OFDM系统中时变信道下信道估计方法的研究

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Time-varying channel tracking using sequential Monte Carlo filter in MIMO systems

基于序贯蒙特卡罗滤波的MIMO快时变信道跟踪

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The contents involve ICI self-cancellation, time-varying channel estimation, system equalization and joint multi-origin ICI cancellation.

主要内容分别涉及ICI自消除，时变信道估计，系统均衡和多成因ICI的联合消除等方面。

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Then, time-varying channel is approximated and simplified to the model in which amplitude and phase are both linearly changed.

然后对时变信道进行了简化，提出了幅度和相位线性变化的模型。

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Compared with the existing approaches, this method can achieve lower NMSE, and is applicable to time-varying channel tracking.

与以往的叠加训练序列估计方法比较，利用算法具有更低的估计均方误差，且适用于时变信道。

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When the angle modulation signals made up of the message model have passed through a randomly time-varying channel, a complex nonlinear estimation model is formed.

当此消息模型构成的角调信号通过随机时变信道后，形成复杂的非线性估计模型。

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Model the time-varying channel using the multi-resolution decomposition wavelets, and then a blind identification method based' on the model is proposed;

结合小波多分辨率分析提出一种基于小波模型的信道盲识别算法；

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On this condition, the OFDM system could track time-varying channel state more accurately by adaptively rectifying the ruling threshold.

在此基础上，通过自适应调整路径捕获的判决阈值，可以更好地跟踪时变信道的状态。

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Simulation results show that the proposed method can compensate non-reciprocity of time-varying channel, and avoid error accumulation.

仿真结果表明，长短期联合的信道预测方法可以避免误差累积，能在更长时间内补偿信道时变造成的信道非互易性。

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Since conventional channel model be considered as a linear time invariant channel, although, some research works continues to deeper research, and model linear time-varying channel.

由于传统信道模型被认为是一个线性的非时变的信道，虽然，后来一些科研工作者又进行了深入的研究，把信道模型扩展到线性时变模型。

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Delay Performance Analysis of the Adaptive Multi-State Automatic Repeat Request System Model in Time-Varying Channel

时变信道中自适应多状态ARQ系统时延性能建模研究

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Based on the Bayesian forecasting technology, a practical time-varying wireless channel model was proposed.

基于贝叶斯预测技术, 提出了一种实用的时变无线信道模型.

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At present, more comprehensive attention has been taken to OFDM technology in data transmitting systems with wireless time-varying channel.

目前，正交频分复用（OFDM）技术因能在无线时变信道中进行高速数据传输而受到广泛的关注。

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