Accurate time delay estimation of overlapping fading multipath components is vital for many systems, particularly for positioning technologies.
多径分量重叠衰落下的精确时延估计对很多系统而言都非常重要，对于定位技术更是如此。
Simulation results from practical measured signals demonstrate that the fractal model can describe multipath fading signals more accurately compared to the conventional statistical models.
对实测数据的分析结果表明，分形模型与传统的统计模型相比能更精确地描述多径衰落信号。
The orthogonality, however, is impaired by multipath fading channels, thus causing multicode interference (MCI) and deteriorating the system's performance at high data transmission rates.
但是这种正交性却被多径衰落信道破坏，产生了多码道干扰，严重影响了系统高速传输数据的性能。
The second chapter of this paper analyzes the multipath effects and fading effects of wireless channel.
第二章分析了无线信道的多径效应和小尺度衰落效应。
Numerical and simulation results show that the Gaussian noises, multi user interferences, multipath fading and diversity receiving all have impact on the system performance.
数值计算和计算机仿真结果表明了高斯噪声、多用户干扰、多径衰落以及分集接收等对系统性能的影响。
In fact, the characteristics of the multipath fading channel in digital cellular mobile communications have become the research of academic analysis and field measure.
实际上，数字蜂窝移动通信中的多径衰落信道特性已成为许多理论分析和现场实测的课题，并已得出了许多有价值的结论。
It can waken the multipath effect availably, eliminate symbol interference and fight against frequency select fading. Moreover, the channel utilization rate is high.
他能有效地对抗多径效应，消除符号间干扰，对抗频率选择性衰落，而且信道利用率高。
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.
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；
The study shows that the algorithm can complete frequency offset tracking in AWGN channel and multipath fading channel.
研究表明，该算法既能在AWGN信道中也能在多径衰落信道中完成频偏跟踪工作。
The fractal theory was applied to describe multipath fading channels, and a novel channel estimation scheme using fractal filter in the sense of minimum mean square error (MMSE) was presented.
本文将分形理论引入多径衰落信道的描述，提出了一种利用分形滤波进行最小均方误差意义下信道参数估计的方法。
The frequency time selective fading resulted from multipath dispersion and Doppler frequency shift is an important characteristic of urban mobile radio channel.
由多径色散及多普勒频移造成的频率—时间选择性衰落是城市移动无线信道的一个重要特性。
In shortwave communication system, Intersymbol Interference is serious and signal is distorted extremely because of fading channel resulted in by the effect of multipath.
在短波通信系统中，由于多径效应常常引起信道衰落，直接结果是码间串扰非常严重。
Two simulation algorithms of realization channel characteristic are analyzed emphatically: shaping of slow fading with correlation and generation of frequency-selected multipath fading.
重点分析了实现信道特性仿真的两种算法：慢衰落的相关性整形和频率选择性多径衰落。
The statistic model of air-ground radio communication channel is characterized by the multipath fading, Doppler power spectrum and delay power spectrum.
空地通信信道的主要统计特性包括多径衰落特性、多普勒功率谱和时延功率谱。
It can be used in multipath channels to suppress multi-address interference and overcome multi-channel fading.
本文中提出的这种算法适用于多径衰落信道，能很好抵消多址干扰和克服多径衰落。
Multipath fading in the microwave line-of-sight (LOS) channels is the major source of. outage of a digital microwave communication system.
微波视距信道中的多径衰落是造成数字微波系统中断的主要原因。
Cooperative diversity technology can overcome the multipath fading and improve the effectiveness of system transmission.
协作分集技术能够克服多径衰落，有效的改善系统传输的可靠性。
Communication systems can enhance their BER performance by using coherence detection only when they could make precise and real-time estimation of fading coefficients of multipath channel.
只有对信号在多径衰落信道中所经历的衰落做出准确实时的估计，系统才可以使用能够提高接收机误比特率性能的相干检测。
OFDM technology has many advantages, such as defending the multipath fading and high bandwidth efficiency, which are suitable for the high-rate data transmission in wireless enviroment.
而且OFDM技术具有抗多径衰落，频谱利用率高等优点，特别适合于无线环境下的高速数据传输。
OFDM transforms frequency-selective multipath fading channel into flat channel in the frequency domain and reduce the effect of multipath fading.
OFDM技术通过将频率选择性多径衰落信道在频域内转换为平坦信道，从而减小了多径衰落的影响。
Multicarrier modulation is a form of parallel data transmission, which is efficient to reduce the detrimental effects of multipath fading.
多载波调制技术是一种并行数据处理方式，有效地对抗多径衰落，可以提高无线带限信道的数据传输速率。
It can both effectively combat multipath fading and improve bandwidth efficiency.
这种技术可以有效的对抗多径衰落以及提高频带利用率。
With this model, the blind multiuser detection and iterative algorithm of MC-CDMA systems based on subspace projection are studied in the multipath fading channel.
由于其在对抗多径衰落方面具有显著的效果，它适合于在无线移动通信信道下使用，因而得到广泛的研究。
The simulation indicates that this method defends the multipath fading effectively.
该方法这样可以更合理地使用多径特征，有效对抗多径衰落。
In this paper, with Rayleigh fading the random characteristics of multipath time delay and Doppler shift in HF ionospheric channels is discussed.
本文在瑞利衰落模型下，研究了高频电离层信道中多径时延与多普勒频移的随机特性。
These parameters are difficult to obtain in multipath fading channels.
在多径衰落信道下，这些参数是很难获得的。
However, as a wireless communication system, the signal transmitted on the wireless channel should be affected by multipath fast fading and the received quality of the signal will be lowered.
但作为一个无线通信系统，所传输的信号必然受到无线信道的多径快衰落影响从而降低信号的接收质量。
However, as a wireless communication system, the signal transmitted on the wireless channel should be affected by multipath fast fading and the received quality of the signal will be lowered.
但作为一个无线通信系统，所传输的信号必然受到无线信道的多径快衰落影响从而降低信号的接收质量。
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