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无线信道信号的混叠
- (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 ,(1) in certain wireless channel, the Doppler f
doppler
- 计算一定运动速度下对应的多普勒频偏。不包含对信号进行多普勒频偏变换的操作。-Calculated under a certain velocity the Doppler shift corresponding. Does not contain a Doppler shift of the signal transformation operation.
multipathofdmdoppler
- 多普勒频偏的应用方法的相关程序，对相关研究的人有着很大的作用-The application of Doppler shift of the relevant procedures, the people of the related research has a significant role in
BlindEstimation
- This file contains a matlab file for blind carrier estimation which compute the phase and frequency offset of carrier due to Doppler shift.
Doppler_Effect
- This the simulation of Pulse Wave Doppler(PWD) effect used in ultrasonic wave. I m a student of HY University and I m not good at programming, but I want to be a nice programmer :D-This is the simulation of Pulse Wave Doppler(PWD) effect used in ul
a_envelope
- Create a channel object that describes the channel that you want to use. A channel object is a type of MATLAB variable that contains information about the channel, such as the maximum Doppler shift.
www
- 使用维纳分布进行瞬时频率估计用来校正电离层非线性相位污染带来的频带展宽-High-frequency (HF) sky-wave radar signals propagate to and from the target by means of the ionosphere. The difficulty in obtaining very narrow beamwidths at HF, and the long ranges involved, mean that the
adaptive_sensig_project
- adaptive spectrum sensing using SNAR comparioson and relative doppler shift (effect) between primary and secondary user
dshift
- Doppler Frequency Shift (single path) multipath signals emit from the source at different angles and arrive at the observer at different angles. Thus, Doppler shifts of different arrivals are usually different from one another.-multipath signal
OFDM11
- OFDM水声通信中最大多普勒频偏估计算法研究-OFDM underwater acoustic communication in the largest Doppler shift estimation algorithm
matlab-acq
- GPS C/A码捕获 用的是fft频域的搜索 有C/A码产生和C/A码数字化子程序，模拟卫星信号的捕获算法和过程，未考虑多普勒频移-GPS C/A code acquisition in frequency domain using the fft search with C/A code generation and C/A code number of subroutines, analog satellite signal acquisition method and process, w
bakecodemohuhanshu
- 通过时频转换法来，来画BPSK巴克码的模糊函数，tao（时延）切面，fd（多普勒频移）切面。以及其模糊度图的画法-Through the time-frequency conversion method to draw Barker code BPSK ambiguity function, tao (delay) section, fd (Doppler shift) section. And its ambiguity diagram drawing
GPS2
- 用MATLAB在产生的观测数据中捕获其中PRN 号码为“5”C/A 码。 （1） 观测数据应该有一定的多普勒频偏D f（-10kHz〈D f〈+10kHz）； （2） 加入高斯白噪声，使其信噪比为-20dB； （3） 捕获成功后，应给出捕获标志，并给出估计的频偏和码偏值。-Generated by MATLAB in which observed data capture PRN number is " 5" C/A code. (1) there should b
GPS_PRN
- 产生任意的GPS卫星信号，包括多普勒频移范围和码相位延迟-Produce any GPS satellite signals, including Doppler shift range and code phase delay
CPPdoppler
- 用于计算一定速度对应的多普勒频偏，不包含对信号进行多普勒偏移的结果。-Used to calculate the Doppler shift corresponding to a certain speed, the signal does not include the results of the Doppler shift.
Rapid-Acquisition-of-Doppler-Shift-
- 本文提出了一种适用于低轨卫异扩频通信系统的多普勒频移快捕方法.该方法基于数字匹配滤波器及自动频率控制环路_利用数字匹配滤波器的囚码快捕特性及其输出主相关峰值对频偏的敏感性，缩短多普勒频移的 捕获时间.论文首先推导了多普勒频移的平均捕获时间表达式，然后根据数值分析结果得到了准最佳捕获判决策略，最后通过比较验证了该快捕方法相对于传统串行捕获方法在性能上的提高. -This paper presents a low-orbit health for different spread spect
Doppler
- 由于信号在传播过程中，由于接收机的移动，就会产生多普勒频移，该文件先分析了多普勒滤波器的频响以及对多普勒频移进行了仿真-Due to the signal in the propagation process, due to the movement of the receiver, and will produce the Doppler shift, the file is first analyzed the frequency response of the Doppler filter
doppler-codes
- 多普勒频移的代码，做信道特别是移动信道肯定会产生多普勒效应，信道代码-Doppler shift of the code, so the channel, especially mobile channel, it would certainly produce a Doppler effect, a channel code
OFDM-Doppler-estimation
- OFDM信号在无线通信中会受到多普勒频移的影响，从而影响了OFDM信号的正交性，引起载波间的干扰和OFDM信号符号间的干扰，本代码先形成含有N个二进制码元的信号，而这个信号的前半部分和后半部分的信号是一样的，然后根据把这个信号调制成OFDM信号，最后接收端根据这个OFDM信号估计出多普勒因子-OFDM signal in a wireless communication will be subject to Doppler shift of influence, thus affecting t
fish2013
- Paper related to Doppler shift