快衰落

在OFDM系统中应用时间分集对抗快衰落

Applying time diversity to overcome fast fading for OFDM system

快衰落信道下OFDM系统的信道估计简化算法

A simplified channel estimation method for OFDM system with fast fading channels

一种基于直接判决的OFDM快衰落信道估计新方法

Channel Estimation Method Based on Decision Directed Technique for OFDM WLANS

分组相关快衰落信道下Turbo码译码算法研究

New Algorithm for Turbo Decoding over Correlated Block Fast Fading Channel

宽带快衰落MIMO信道中高斯插值算法研究

Analysis of Gaussian Interpolation in Broadband Rapid Fading MIMO Channel

频选快衰落信道的Turbo均衡算法

Turbo Equalization with Frequency - Selective Fast-Fading Channel Tracing

时间选择性快衰落信道中OFDM系统的ICI功率分析

Analysis of ICI power of OFDM systems in time selective fast fading channel

一种提高TDD系统在快衰落信道中性能的新型时隙结构

A Novel Time Slot for Combating Fast Fading in TDD Systems

论文针对高速移动MIMO-OFDM系统快衰落信道估计方法进行研究。

The fast fading channel estimation method is proposed for high-speed mobile MIMO-OFDM system .

宽带调制对TDMA蜂窝系统中快衰落的影响

The Influence of the Wideband Modulation over Fast Fading in TDMA Cellular Systems

RBFN在OFDM快衰落信道估计中的应用

Application of Radial Basis Function Network in Channel Estimation of OFDM Fast Fading Channel

在MIMO信道容量理论的基础上，推导了准静态Rayleigh衰落信道和快衰落信道下空时编码的设计准则。

On the base of theory of MIMO channel capacity , we induced the criterion of STTC on slow Rayleigh fading channels and fast Rayleigh fading channels .

在由多径传播而产生的快衰落信道中，独立分量分析（ICA）算法产生性能恶化。

In the multi-path fast-fading channel , the independent component analysis ( ICA ) algorithm could not be convergent and the result would be deteriorative .

一种快衰落信道中OFDM系统的Kalman信道估计方法（英文）串联混合有源电力滤波器基于双dq变换的新型控制方法

Improved Kalman filter channel estimation method for OFDM systems in fast time-varying environment NEW CONTROL SCHEME BASED ON DOUBLE DQ TRASFORMATION FOR HYBRID SERIES ACTIVE POWER FILTER CHANNEL

基于快衰落信道的一种新型自适应MLSE接收器

Adaptive MLSE Receiver in Fast Fading Channel

它不仅可避免这类信道中难于实现的信道估计，而且可同时获得由多发射天线提供的满空间分集以及由快衰落信道提供的最大Doppler分集。

The design not only foregoes channel estimation being difficult in such channels , but also achieves the full space diversity provided by multiple transmit antennas and the maximum Doppler diversity offered by rapidly fading channels simultaneously .

分析了分组相关快衰落信道（CBFF）的特性，推导出该信道下Turbo码译码算法；

With the knowledge of correlated block fast fading channel , a new Turbo decoding algorithm is proposed .

快衰落信道下MLSD接收机的简化

The MLSD Receiver 's Simplified over Fast Fading Channel

瑞利快衰落信道下的仿真结果表明，信道估计精度较之传统的LMS和RLS算法有明显提高。

Accordingly , two algorithms are proposed for this purpose , Simulation results show that using proposed algorithm , higher channel estimation precision can be obtained than traditional LMS and RLS algorithms .

对于多天线系统，在快衰落条件下，传统线性信道估计算法，如LS（LeastSquares），虽然信道估计计算复杂度较低，但是信道估计精确度不高。

For the multiple antenna system , in the fast fading conditions , the traditional linear channel estimation algorithm , i.e. , least squares ( LS ), has lower computational complexity ; however , the channel estimation accuracy is far from satisfied .

快衰落多径信道中一种简单的STF-OFDM传输方案

Simple STF-OFDM transmission scheme for fast fading multipath channel

提出了一种基于空间时间频率（STF）编码的正交频分多路复用（OFDM）发射分集方案，这种传输方案可用于频率选择性快衰落信道。

A space-time-frequency ( STF ) coded orthogonal frequency division multiplexing ( OFDM ) transmitter diversity scheme for fast fading frequency selective channels is proposed . The proposed STF-OFDM transmission scheme owns time diversity gain .

针对频率选择性快衰落信道的多径干扰和较大的多普勒频率扩展，提出了一种基于导频的低维Kalman滤波算法用于正交频分复用（OFDM）系统信道估计。

Under analyzing several characteristics of frequency-selective fast fading channels , such as large Doppler spread and multi-path interference , a low-dimensional Kalman filter method based on pilot signals is presented for the channel estimation of orthogonal frequency division multiplexing ( OFDM ) systems .

仿真结果表明，快衰落信道下动态LMS算法接近理想性能；慢衰落信道下动态LMS算法和全局优化算法结合应用，可以接近理想性能。

Simulation result shows that dynamical LMS algorithm is close to the optimum in fast fading channel , and the combination of dynamical LMS algorithm and global optimization is close to the optimum in slow fading channel in efficiency .

所提算法适用于任意酉空时星座，消除了准静态信道假设下MSDD算法在快衰落环境下的误码平层。

The proposed algorithms are suitable for arbitary unitary space-time constellations , and eliminate the error floor in fast fading channels caused by MSDD with quasi-static channel assumption .

空频分组编码（SFBC）结合正交频分多路复用（OFDM）的发射分集方案（SF-OFDM）利用空间分集可以有效克服快衰落信道造成的不利影响，提高系统性能。

Orthogonal Frequency-Division Multiplexing ( OFDM ) transmitter diversity scheme based on Space-Frequency Block Code ( SFBC ) can effectively overcome detrimental influences induced by fast fading channels and improve system performance by utilizing space diversity .

通过研究信道估计精度对快衰落下迭代频域均衡算法带来的性能影响，结论表明在快衰落环境下有必要引入信道滤波跟踪环节来获取更精确的CSI以更好的进行迭代频域均衡。

By studying the performance impact of the channel estimation accuracy for the next iteration of the fast fading frequency domain equalization , it is necessary to introduce aspects of channel filtering to obtain a more accurate tracking of the CSI in order to better iterative frequency-domain equalization .

在快衰落信道情况下，基于判决指导信道估计（DDCE）法不能够很好的跟踪信道参数的变化，使得系统性能产生很大的恶化。

The decision-directed channel estimation ( DDCE ) can 't track the channel variations in fast fading channels , and thus the system performance degradation occurs .

在这篇论文中，为了防止在快衰落信道中由于信道估计误差带来STTC-OFDM系统性能恶化，我们在每帧除训练符号外的OFDM符号引入导频辅助半盲（APSB）信道估计技术。

In this paper , to prevent the performance degradation for STTC-OFDM system in fast fading channels , it proposes the system that applies the APSB channel estimation to all OFDM data symbol except the preamble of a frame .

信号的中值估计是到达信号强度（SSOA）定位的核心，其误差主要来源于信道的快衰落和阴影（慢）衰落。

The estimation of local mean signal strength is the core of SSOA ( Signal Strength Of Anival ) location . The primary source of error is fast fading and shadowing ( slow fading ) .