fading signal
英 [ˈfeɪdɪŋ ˈsɪɡnəl]
美 [ˈfeɪdɪŋ ˈsɪɡnəl]
网络 衰减信号; 衰落信号
双语例句
- Real-Time Measurement of Slow Fading Signal in Wideband Fading Channel
宽带衰落信道中慢衰落信号的实时测量 - If the time interval among the transmissions is long enough for each time, the fading presented by the transmission of the signal will be mutual for each time.
如果各次发送的时间间隔足够大，那么各次发送信号所出现的衰落将是彼此的。 - The satellite system is doomed to suffer from the multipath fading in the presence of little elevation. Because the speed of the satellite comparing to it of the ground station is fast, the high Doppler shifts may lead to fast fading of the signal.
特别是卫星在低仰角进行通信时，多径衰落尤其严重，并且由于卫星与地面接收点（地面站或移动用户）的相对运动较快，高多普勒频移可能使信号经历快衰落。 - Because of the enormous fading of the optical signal in underwater laser communication, the capacity of the error-correcting code must be well enough.
由于水下通信信道对光信号的衰减极大，实际通信系统的编码应具有极强纠随机差错和纠突发差错的能力。 - Since WCDMA up-link adopt the RAKE receiver using coherent detection system, the exact and Real-time channel fading estimation of the transmitted signal is needed to realize the phase correction and coherent reception.
由于WCDMA系统上行链路采用的是基于相干解调的RAKE接收方案，故要求对信号在多径衰落信道中所经历的衰落作出准确实时的估计，以便在RAKE接收机中实现相位纠偏和相干接收。 - This paper applies wavelet and fractal theories to analyze multipath fading signal in mobile radio communications for the first time.
首次将小波理论和分形理论相结合来分析多径衰落信号。 - But there are a lot of questions in DS-CDMA satellite communication system, such as the fading of received signal, the multiple access interference ( MAI), large Doppler frequency offset, the CW and narrow band interferences in channel and so on.
但是，在DS-CDMA小卫星通信系统中，亦存在如下问题：如接收信号的衰落、多址干扰（MAI）、大的多普勒频移、信道中的连续波（CW）及窄带干扰等。 - It is found infeasible to overcome the polarization-induced fading influence on output signal through AGC circuit which uses peak or peak-peak signal of interferometric detection method to control the gain of AGC circuit.
提出了不能通过干涉信号的峰值或峰峰值检测来控制自动增益控制（AGC）电路增益的方法消除偏振衰落对输出信号的影响。 - In practice, the channel state in Nakagami fading needs to be estimated for many optimum signal processing techniques.
在实践中，Nakagami衰落信道下的信道状态的估值算法在很多最优化的信号处理技术中都是必需的。 - The main factors affecting the stability of demodulation signal are particular analyzed in theory. It is found infeasible to overcome the polarization-induced fading influence on output signal through AGC circuits which use peak or peak-peak of interferometric signal detection method to control the gain of AGC circuits.
从理论上详细分析了影响解调信号稳定性的主要因素，提出了不能通过干涉信号的峰值或峰峰值检测来控制自动增益控制（AGC）电路增益的方法消除偏振衰落对输出信号的影响； - The wavelet coefficients under the different scales have self-similarity, which proves that multipath fading signal has fractal characteristic.
多径衰落信号不同尺度下小波变换系数具有自相似性，论证了多径衰落信号的分形特性。 - Based on the ITS channel model this paper theoretically discusses the fading effect of the ionosphere to the signal which is reflected by the ionosphere.
在宽带信道模型的基础之上，从理论上分析了电波信号通过电离层信道所经受的衰落影响。 - Singularity plays an important role in the channel estimation and signal reconstruction. Singularity shows local mutation of multipath fading signal, and multifractal shows self-similarity between local and whole.
根据多径衰落信道参数突变，首次指出了多径衰落信号具有局部奇异性，其局部奇异性对信道参数估计和信号重构有着重要的作用。 - Thus, the signal dispersion caused by frequency selective Multipath fading and the time-varying signal propagation resulting from vehicular motions introduce intersymbol interference ( 181) and random Doppler fading.
如在频率选择性衰落信道和时变衰落信道中由于车载运动所带来的ISI和离散多普勒频移的影响，使得接收信号的质量很差。 - 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； - Multipath Fading Signal Analysis with Wavelet and Fractal Theories
基于小波和分形理论的多径衰落信号分析 - In a communication system, after noisy channel transmission, signal distortion will inevitably appear as a consequence of communication channel noise interference and fading characteristic, when information signal reaching the receiver side.
由于通信信道固有的噪声衰落特性，信号在经过有噪信道传输后，到达接收端的过程不可避免地会受到干扰而出现信号失真。 - The results of analysis show that: the average probability of error for digital data communication in slow Rayleigh fading channel is less one half magnitude than the optimized threshold detection with fading signal at same mean SNR.
结果表明，在Rayleigh慢衰落信道上采用这种检测器，相对于工作此信道上的最佳固定门限检测器，在不同输入信噪比情况下，其平均误码率约有半个数量级的改善。 - For the phase of multi-path signal in receiver is different, the strength of receiver signal may be enhanced or diminished via superimposing, which leads the rapid fading of the signal in a short distance.
由于到达接收机的相位不同，则多径信号到接收机叠加之后的信号强度可能增强或减弱，这就导致了信号在短距离内快速衰落。 - 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, there is a big problem that multipath fading in signal transmission has affected the development of wireless communication.
但是无线通信中的信号传输多径衰落效应一直是限制无线通信发展的一大问题。 - Due to the multi-path propagation of radio waves, signal fading and signal phase shifting can be caused in the wireless communication.
在无线通信中，由于受到多径传播的影响，导致传输信号的衰落和相移。 - Modeling and simulation of fading channels and non-Gaussian noise signal are investigated.
对无线衰落信道和非高斯噪声信号的建模及仿真实现进行了研究。 - Therefore, measures must be taken to combat multipath fading so as to improve the signal energy captured.
为了提高通信系统的性能，必须解决抗多径衰落问题，提高接收端捕获的信号能量。 - Wireless signal propagated in the wireless channel will be affected by multi-path time delay spread, Doppler shift, angular spread and other characteristics of multi-path fading, leading to the received signal distortion in amplitude, phase and frequency.
无线信号在无线信道中传播，容易受到多径时延扩展、多普勒频移、角度扩展等多径衰落特性影响，导致接收信号在幅度、相位和频率上失真。 - Taking into account the fading signal instability, we also proposed a multi-antenna signals detection mode in this thesis, and analyzed robustness of the detection method.
考虑到衰落信道下信号的不稳定性，本文还采用了多天线的检测模式，并分析了在此情况下该检测方法的有效性与可行性。 - In wireless communications, when the symbol period is smaller than the signal multipath delay spread, in the other words, when a frequency selective fading channel is existed, the received signal will suffer a serious inter-symbol interference ( ISI).
无线通信中，当符号周期小于信道的多径时延扩展，即出现信道的频率选择性衰落时，接收信号会受到严重的码间干扰（ISI）。 - The signal model in multiplicative noise can also be applied to the fading channel, earthquake signal processing, image processing and so on.
乘性噪声情形下的信号模型还可应用于衰落信道的信号传输，地震信号处理，图像处理等领域。 - In order to combat fading effects, Signal Space Diversity ( SSD) technique is invented.
为了对抗衰落，信号空间分集技术应运而生。 - Specifically, this dissertation analyzes the signal expression, fading characteristics and the received signal statistical properties of the envelope, moreover, some characteristic parameters of WLAN fading channel are calculated. Secondly, focus is placed on the statistical model of the indoor propagation.
具体分析了WLAN系统中的信号形式、信道的衰落特性与接收信号的包络统计特性，对信道衰落特性参数进行了推算。其次，本文重点对室内信号传播的统计模型进行了研究。