Description: 空间无线信道建模程序matlab，考虑了多径延迟，多普勒效应，信号的角度扩展（拉普拉斯分布），MIMO，可以产生MIMO信道矩阵。-Spatial channel modeling procedures matlab, taking into account multi-path delay, Doppler effect, the signal point of view the expansion of (Laplace distribution), MIMO, can generate MIMO channel matrix. Platform: |
Size: 457728 |
Author:李明 |
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Description: 多普勒效应的描述，适用于各种多普勒时延情况，可以由仿真图形观察各种情况对应的结果-Description of the Doppler effect, Doppler delay applicable to various circumstances, can be observed from the graphical simulation results corresponding to various situations Platform: |
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Author:dalong |
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Description: 在有限的实验条件下，为验证高动态软件GPS接收机信号的捕获和跟踪模型，提出了一种基于软件GPS
接收平台的高动态GPS数字中频信号模拟方法。介绍了软件GPS接收平台的基本结构框架，并根据高动态环境
下伪随机码的多普勒效应及本地振荡器的频率误差对接收信号的影响，推导并建立了一种较精确的高动态GPS
数字中频信号模型。为使模型适用于更加复杂的环境，通过设置接收信号的噪声幅值来调整信噪比大小，以确
定所需的信号强度；在信号参数的设置过程中调整入射信号与反射信号的幅度比值及反射信号的时间延迟参
数，以模拟不同程度的多路径效应对中频信号的影响。仿真结果表明了该方法的有效性。-In order to validate the model for capturing and tracking the high dynamic signal of the software GPS
receiver on limited experiment condition, a method for modeling the high dynamic numeric IF signal was presented
based on the software GPS receiver platform. The basic frame of the software GPS receiver platform structure was
introduced, and according to the impact of the Doppler effect of the pseudo-noise code and the frequency error of the
local oscillator on the received signal in high dynamic environment, a more precise model of high dynamic GPS
numeric IF signal was deduced and established. To make the model be applicable in more complicated environment,
the required intensity of the signal was obtained by setting the noise’s magnitude of the received signal and adjusting
the Signal-to-Noise ratio. In the process of setting the signal parameters, the ratio of the incident signal’s magnitude to
the reflected one and the time delay of the reflected signal were adjust Platform: |
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Author:luchan |
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Description: 利用扩展卡尔曼算法( EKF)对高动态直接扩频信号的载波相位和频率进行了估计,并利用载波辅助技术测量载波相位的变化值来
校正伪码延时环,减小多普勒频移对伪码延时的影响,得到了精确的延时估计值,提
高了伪码延时锁定环的动态跟踪性能.-The PN delay loop is adjusted through measuring the varied value of carrier phase with carrier aiding technology. The effect of Doppler shift on PN code delay is reduced through carrier aid-
ing technology. The precise delay estimation is obtained. The dynamic tracking performance of the PN delay loop is improved. Platform: |
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Author:李新一 |
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Description: 脉冲多普勒雷达是利用运动的物体对发射信号的产生的多普勒效应来测速和测距的，利用回波的延时可以测距，求出多普勒频率可以求出物体的速度-Pulse Doppler radar is to use the Doppler effect on the motion of an object generated by the transmission signal to the speed and distance, the distance can use the echo delay, the Doppler frequency can be calculated the speed of the object is obtained Platform: |
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Author:lucky |
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Description: 对EBPSK(Extended binary phase shift keying)调制雷达系统的特点，本文将其与传统的LFM(Linear frequency modulation)雷达系统进行综合性能比较。-he overall performances of EBPSK(Extended binary phase shift keying) modulation and LFM(Linear frequency modulation) radar systems are compared. First, the target detection performance base on CFAR(Constant False Alarm Rate) of two systems are analyzed under several conditions. As the time-delay is relatively large, the detection performance of EBPSK modulation radar system is better than LFM radar system. EBPSK modulation signals can combat the effect of Doppler spread on system performance in HF(High Frequency) channel. Platform: |
Size: 6144 |
Author:shell |
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