多径传播

本文通过对多径传播条件下DOA估计算法的研究，提出了一些更为优越和有效的算法。

In this paper , we study the DOA estimation algorithm in multipath propagation and propose some more superior and effective algorithms .

OFDM调制技术由于其较强的抗多径传播和频率选择性衰落能力以及较高的频谱利用率，在许多无线通信系统中得到广泛应用。

OFDM has been used in many wireless communication systems , due to its ability to repress multipath propagation , frequency selective fading and high spectral efficiency .

UWB室内视距环境多径传播模型

Multipath model for UWB indoor LOS environments

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 .

正交频分复用（OFDM）是一种新型调制技术，特别适合在多径传播的无线移动信道中高速传输数据。

OFDM ( Orthogonal Frequency Division Multiplexing ) is a new modulation technology , it is suitable to high-data-rate transmission in the wireless transfer channel with multi-path transmission .

『正交频分复用（OFDM）技术具有很强的抗多径传播和频率选择性衰落能力，成为了第四代移动通信系统的核心技术。

Orthogonal Frequency Division Multiplexing ( OFDM ) becomes the core technology of fourth-generation mobile communication system , which has strong capacity of anti-multipath spread and frequency selective fading .

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 .

第五章对差分OFDM系统进行了研究，对加性高斯白噪声（AWGN）信道下具有多径传播的正交频分复用多载波通信系统进行了计算机仿真。

Chapter V studied differential OFDM systems , it simulated the OFDM multi-carrier communication system with the AWGN channel and multi-path characteristics by computer .

加性噪声以及由多径传播导致的符号间干扰（ISI）限制了高速率无线通信技术的发展。

High data rate in wireless communication is limited by additive noise and the Inter-symbol Interference ( ISI ) owing to multi-path propagation .

还分析了多径传播和金属干扰对集装箱RFID系统的影响，给出了可以忽略多经时延和多普勒效应的理论依据，提出了解决集装箱RFID系统中金属干扰问题的技术措施。

The influence of the multi-path transmission and metal interference to the container RFID system were also analyzed . The theoretical basis to ignore the multi-path delay and Doppler Effect was given .

正交频分复用（OFDM，OrthogonalFrequencydivisionMultiplexing）是目前频谱利用率最高的一种技术，适合在多径传播和多普勒频移的无线移动信道中传输高速数据。

Orthogonal Frequency Division Multiplexing ( OFDM ) is a technique which has the highest spectrum efficiency currently , suitable for the multi-path transmission and Doppler frequency shift of the wireless mobile channel to transfer high-speed data .

接下来提出的算法中，我们将空间差分技术和矩阵重构技术相结合并应用到多径传播条件下的二维DOA估计当中。

In the follows , we combine the spatial difference technique and the matrix reconstruction technique together , and apply them to the 2D DOA estimation in multipath propagation .

因此，目前有越来越多的国内外研究学者投身于多径传播条件下DOA估计的领域中来，希望可以通过这些估计获得更多的信息，直接为军事以及生产生活所应用。

Therefore , there are more and more researchers engage in the topic of DOA estimation , and hope to obtain more information to be directly used by military or civil-ian .

在高速水声通信系统中，由于多径传播而引起的码间串扰ISI是传输误码率增加的主要原因。

In a high-rate underwater communication system , the delay spread due to multipath propagation results in intersymbol interference ( ISI ) which may increase the transmission bit error rate .

MIMO（MultipleInputMultipleOutput）做为LTE的关键技术之一，可以有效地利用信道的随机衰落和多径传播，在不额外增加功率和带宽条件下成倍增加传输速率和大幅度改善链路质量。

As one of the key technologies of LTE , MIMO ( Multiple Input Multiple Output ) can effectively utilize the random channel fading and multipath propagation to increase the transmission rate and improve the link performance without additional power and bandwidth consumption .

针对移动定位中NLOS和多径传播的影响，将节点定位嵌入到机器学习框架内。

To mitigate the side effect of NLOS and multipath transmission in the mobile localization , node localization is embedded into the framework of machine learning .

在3G微小区的传播环境下，对线性自适应均衡算法进行仿真研究，为此构建了与3G接近的实用系列时延扩展的传播环境和可变多径传播信道。

The simulation research is made to the performance of linear adaptive equalization algorithm under the 3G micro-cell transmission situation . Furthermore , a near 3G practical time delay propagation environment and variable multipath propagation channels are established .

MIMO技术通过在无线通信系统的收发两端同时配置多个天线，充分利用了无线信道的多径传播特性，从而大大提高通信系统的频谱效率。

By employing several transmit and receive antennas at both end of the air link , MIMO is able to exploit the multipath of the wireless channel effectively , thus greatly increase the spectrum efficiency of the communication system .

MIMO技术（多输入多输出技术）就是在发射端和接收端分别使用多个发射天线和接收天线传输信号，利用无线信道的多径传播特性来提高系统的性能，从而显著提高信道容量。

MIMO ( Multi-InPut and Multi-OutPut ) makes use of multi-antennae at transmitting and receiving side to transmit signals , and the multi-paths spreading characters of wireless channel to improve the performance of the system and the capability of the channel .

研究显示，采用OFDMA技术可有效提高无线通信系统的接入速率，有效对抗窄带干扰和由多径传播引起的符号间干扰，提高系统传输信息的容量。

Researches show that , OFDMA technology can effectively improve the access rate of wireless communication system . OFDMA system can reduces narrowband interference and symbols interference caused by multipath spread effectively .

在现有的定位方法中，指纹信号定位法由于在复杂多径传播环境下精度较高，适用于室内环境，因此被现有的WLAN室内定位系统所广泛采用。

In the existing localization methods , Fingerprint location method provides better precision in the complex multi-path environment , Compared to other methods it is more suitable for the indoor environment , so it has been widely used in the existing WLAN indoor location systems .

仿真实验结果证明，与循环root-MUSIC算法相比，该算法适应多径传播环境，具有计算量小和性能好等特点。

Finally , the simulation results , compared with Cyclic root-MUSIC algorithm , adapt to multipath environment and have features of better performance and low computational complexity .

正交频分复用（OFDM）是B3G和4G移动通信系统的核心技术，其最大的优点是频谱利用率高，且可以较好地对抗无线信道的多径传播。

Orthogonal Frequency Division Multiplexing ( OFDM ) is the key technology of B3G and 4G mobile communication system . The most significant advantage is its high spectrum efficiency and it also can greatly eliminate the impact of multi-path propagation of wireless channel .

针对移动通信环境中多径传播的信号到来方向估计问题，结合空间平滑技术，提出一种空间平滑的ESPRIT算法，并给出了多径信号数目的推定方法。

A modified ESPRIT algorithm is presented by spatial smoothing technique to solve the problem of signal estimation in the presence of multipath environment of mobile communication , and a method to estimate the number of multipath signals is given .

隧道内微波多径传播特性的仿真

The Simulation of Multipath Propagation Characteristic of Microwave in a Tunnel

移动通信中多径传播时延的分布密度

A Distribution Density of Multipath Propagation Delay for Mobile Radio Communication

陆地移动通信多径传播的实时模拟技术研究

A Real-time Simulation Method of Multipath Propagation for Land Mobile Communications

多指标随机过程随机桥过程建模超宽带多径传播信道

Applications of Stochastic Bridge Processes for Modeling UWB Wireless Propagation Channels

在实际的通信环境中，信号往往是多径传播。

In real communication environment , signal transmits with multi-path .

在多径传播环境下，这种发送方案的性能会受到挑战。

There is performance challenge for this scheme under multi-path propagation environment .