频率选择性衰落

频率选择性衰落环境中MIMO系统信道容量研究

On the capacity of MIMO systems in frequency selective fading environments

正交频分复用（OFDM）是一种有效克服频率选择性衰落的技术。

OFDM is one of the key techniques to effectively combat frequency selective fading .

频率选择性衰落信道中多用户OFDM系统的自适应分配算法

An Adaptive Allocation Algorithm for Multiuser OFDM System over Frequency Selective Fading Channels

频率选择性衰落信道下长扩频序列CDMA系统的盲波束成形

Blind Beamforming for Long Spreading Sequence CDMA System in Frequency Selective Fading Channel

OFDM技术可以将频率选择性衰落转化为平坦衰落。

Frequency elective fading channel can be changed into flat fading channel by OFDM technique .

正交频分复用（OFDM）技术能够有效地对抗多径传播引起的频率选择性衰落，将频率选择性衰落信道转化为平坦衰落信道。

Orthogonal Frequency-Division Multiplexing ( OFDM ) is a fine technique to mitigate the effect of frequency-selective fading .

线性预编码是OFDM系统在频率选择性衰落信道中利用频率分集的有效方法。

Linear precoding is an efficient approach to increase frequency diversity order for OFDM systems over frequency-selective channels .

频率选择性衰落信道下的MIMO-OFDM系统性能研究

Research on performance of MIMO-OFDM systems in frequency-selective fading channels

以MIMO频率选择性衰落情况下联合信道估计与信号检测为背景，提出了一种时延域粒子滤波。

In the background of MIMO frequency selective channel estimation , a time delay domain particle filtering is suggested .

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 .

通过MIMO技术与OFDM/SC-FDE技术结合，可以使得MIMO技术更方便的应用于频率选择性衰落的多径信道中。

MIMO technique can be used more efficiently combined with OFDM / SC-FDE in multipath frequency selective fading channel .

无线OFDM系统频率选择性衰落信道下的SOVA译码算法

SOVA Algorithms Under Frequency-Selective Fading Channel for OFDM Wireless System

但是，目前对于矢量OFDM在频率选择性衰落信道下完整的性能刻画尚属空白。

However , the complete analysis of the performance of the vector OFDM in frequency selective fading channel is still absent .

针对频率选择性衰落MIMO移动信道，建立三维（3D）纯随机模型，并推导出3DMIMO信道模型的联合空时频相关函数。

A 3D statistical channels model for mobile frequency selective fading MIMO channels was proposed and a new joint space-time-frequency correlation function was derived .

本文采用ML准则得出了适于频率选择性衰落的线性解相关算法。

In this paper , a decorrelator for multiuser detection derived from ML criteria in CDMA system is proposed for frequency selective fading channels .

MIMO-OFDM既利用了MIMO技术提高系统频谱利用率的优势，又具备了OFDM抵抗频率选择性衰落的优点。

MIMO-OFDM takes the advantage of MIMO in improving spectrum efficiency and has the OFDM resistance frequency selective fading .

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 .

在AWGN（AdditiveWhiteGaussionNoise）信道以及频率选择性衰落信道下，对各种算法做了大量的仿真。

A lot of computer simulations are given over Additive White Gaussion Noise ( AWGN ) and frequency selective fading channels .

频率选择性衰落对QPSK系统误码性能的影响

The Influences of Frequency Selective Fading on BER Performance of QPSK Systems

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 .

正交频分复用（OFDM）技术利用相邻子载波间的正交特性，能有效对抗无线信道的频率选择性衰落。

Orthogonal frequency division multiplexing ( OFDM ) technology uses between adjacent sub-carrier orthogonality can be effective against frequency-selective multipath fading wireless channel .

正交频分调制（OFDM）是一种高效的数据传输技术，具有良好的抗频率选择性衰落能力，并且提高了频谱利用率。

The great advantage of OFDM is that it is robust against frequency selective fading and that it improves frequency utilizing rate simultaneously .

利用上述移不变性性质，本文进一步提出了相应的下行频率选择性衰落MIMO无线信道的盲估计方法。

By exploiting the induced shift-invariance property , one blind estimation method of downlink frequency-selective fading MIMO wireless channels is further derived .

研究了频率选择性衰落信道中Turbo乘积编码OFDM（OrthogonalFrequencydivisionMultiplexing，OFDM）系统中低复杂性的最小平方信道估计技术。

The least square channel estimation with low complexity in Turbo Product Coded Orthogonal Frequency Division Multiplexing ( TPC-OFDM ) over frequency-selective fading channels is presented .

针对多天线OFDM系统提出一种可用于频率选择性衰落信道的时钟频偏估计算法，这种算法可以在存在载波频偏的情况下工作。

For multiple-antenna OFDM systems , a clock frequency offset detection algorithm is presented . The algorithm can work before carrier frequency offset compensation .

频率选择性衰落信道中MC-CDMA信号检测技术

MC-CDMA Detection Techniques in Frequency Selective Fading Channels

频率选择性衰落信道中V-BLAST系统的改进概率译码算法

An Improved Iterative Decoding Algorithm for V-BLAST in the Frequency Selective Channel

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 make the frequency selective fading channel into a group of orthogonal flat fading channel to overcome the impact of multipath fading .

OFDM（OrthogonalFrequencydivisionMultiplexing）技术由于具有频谱效率高和抗频率选择性衰落强等优点，已经成为未来无线通信的关键技术。

Due to its high spectral efficiency and robustness against frequency selective fading , Orthogonal Frequency Division Multiplexing ( OFDM ) has become a key technique in future wireless communication .

而在消除符号间干扰和均衡由无线信道时延扩展引起的频率选择性衰落方面，正交频分复用（OrthogonalFrequencydivisionMultiplexing，OFDM）技术具有明显优势。

In receiver , Orthogonal Frequency Division Multiplexing ( OFDM ) system can easily cancel ISI and equalize frequency-selective fadings that are both caused by time disperse of radio channel .