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.
使用随机桥过程研究超宽带(uwb)多径传播信道。
Stochastic bridge processes are employed to analyze the characteristics of UWB multipath propagation channels in the current research.
该模型充分考虑了多径传播，以及频率和长度对衰减的影响，使其更具有实用价值。
The model has fully considered the multi way of transition, as well as the frequency and length affected to the reduction in order to have more practical value.
本发明涉及对室内视距环境下i - UWB信号多径传播特性进行建模的方法和系统。
The invention relates to a method and a system for modeling I-UWB (Impulse-Ultra Wide Band) signal multipath transmission characteristics in an indoor visual range environment.
但是电力线信道上存在的各种噪声、衰减和多径传播等问题，这些都大大提高了通信的难度。
But the noises, the attenuation and the multipath propagation inhering in the powerline make it very difficult to realize such kind of communication system.
为了减小水声通信系统中存在的由于多径传播效应引起的符号间干扰，可在系统中使用线性均衡器。
To induce inter symbol interference which is due to multipath transmit effect in the water acoustic communication system, linear equalization can be adopted in the system.
由于室内环境复杂，多径传播、随机噪声干扰等影响较大，因此室内定位系统的算法研究具有挑战性。
Because the indoor environment is very complex, and it's greatly influenced by multipath propagation and random noise, the research on the algorithms of indoor location system is of great challenge.
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.
其中主要为无线衰落信道中的多径传播和散射引起的信号衰落，以及大的多径时延而引起的符号间干扰。
The problems mainly exhibit to be multi-path propagation in the wireless fading channel, signal fading caused by the scattering and Inter-Symbol Interference caused by the long multi-path time delay.
OFDM是一种无线传播环境下的高速传输技术，适合在多径传播和多普勒频移的无线信道中传输高速数据。
OFDM is a high transmission technology in the wireless propagation environment. It is fitted to transmit high-speed data in the wireless channel which has multi-path delay and Doppler frequency shift.
为了克服由多径传播造成的相移失真难题(特别是在HF链路里)，调制采用差分相移键控(DPSK)来完成。
To cope with the problem of phase shifts caused by different propagation paths (especially in HF links), the modulation is done in differential phase shift keying (DPSK).
他们的主要问题是传输过程中会产生噪声和失真的积累，由电波多径传播会产生衰落，会严重影响音频的传输质量。
Their main problem is the transmission will be the accumulation of noise and distortion from the spread of multi-path waves will decline would adversely affect the quality of audio transmission.
在本论文中，首先对移动传播环境作了描述，特别是对小尺度多径传播造成的幅度衰落，多径时延和多普勒频移进行了分析；
The wireless propagation environment is described first: analyzing the small-scaled fading, including amplitude fading, multi-path time delay and Doppler spectrum spread.
众所周知，水下声信道是相干多途信道，信号在信道中的多径传播使得接收信号序列复杂化，因而极大地增加了信号处理的难度。
It's well known that underwater acoustic channel is a coherent multi-path channel, which brings difficulties in signal processing because of the complexity of the received signal sequence.
超宽带信号经多径信道传播会产生严重的时间弥散。
In multipath environments, ultra-wide band signals suffer from severe time dispretion.
从该电子密度模式和电离层波传播特性出发确定多径分量，计算短波信道相干带宽。
The coherence bandwidth of shortwave channel is calculated by using the density profile and wave propagation features in ionosphere.
从随机桥过程出发引入随机波束概念，使用随机波束研究超宽带(uwb)室内多径信道的传播特性。
Based on stochastic bridge processes, an idea of stochastic beams is introduced, which can be used to exploit the propagation characteristics of Ultra-wideband (UWB) indoor multipath channels.
介绍了一个模拟最多三个不同传播路径的典型多径效应模型，通过增加相同的单元数目可以实现更多路径的模拟。
A typical model to simulate the multi path effects up to three different propagation paths was introduced, more paths 'simulation can be implemented by increasing the number of same units.
本文研究多径衰落信号的多重分形性质，分析并指出了信号多重分形维数是描述无线信道传播特性的重要参数；
Fractal characteristic of multipath fading signal is studied in the paper which shows that multifractal dimension is a key parameter for describing the signal propagation in wireless channels.
该方法首先通过修正后的TST - MUSIC算法估计多径的传播时延和角度。
In the algorithm, the propagation delays and the angles of multipath are firstly estimated by a modified TST-MUSIC algorithm.
论文首先介绍OFDM的基本结构和OFDM 技术的应用领域，然后论述了移动通信中的多径信道成因对信号传播的影响。
Firstly, the basic structure and the application fields of OFDM is introduced, and then the reason of the mobile multipath channel's forming and its influence on signals is elaborated.
论文首先介绍OFDM的基本结构和OFDM 技术的应用领域，然后论述了移动通信中的多径信道成因对信号传播的影响。
Firstly, the basic structure and the application fields of OFDM is introduced, and then the reason of the mobile multipath channel's forming and its influence on signals is elaborated.
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