搜索资源列表
PLL_PLV
- 锁相回路可视为一个输出相位和输入相位的回授系统用以同步输入参考讯号和回授后输出信号。并让其操作同样的频率。如(图一)所示，简单锁相回路[3,4]是由三个电路构成，分别为相位侦测器（Phase Detector）、回路滤波器（Loop Filter）、压控荡器（VCO）-phase-locked loop can be regarded as a phase output and input phase feedback system for synchronous reference input
Application_and_Study_of_Matlab_on_Time-frequency_
- 基于matlab的信号时频分析仿真 MATLAB 软件在多个研究领域都有着广泛的应用。其中,它的频谱分析和滤波器的分析设计功能很强,从而使数字信号处理变得十分简单、直观。本文介绍了时频分析基础理论及一些应用,运用MATLAB 语言实现了旨在构造一种时间和频率的密度函数,以揭示信号中所包含的频率分量及其演化特性的wigner-ville 分布。-Matlab-based time-frequency signal analysis and simulation software MATLAB
gsm05.04
- GSM 调制的协议规定，主要是GMSK 高斯滤波最小移频键控调制 里面具体说明了调制方法和参数-GSM modulation of the agreement, is the smallest GMSK Gaussian filter frequency-shift keying modulation inside specify the modulation method and parameters
123
- IIR数字滤波器的设计，抽样频率为2*pi*1.5*10^4,通带截止频率为2*pi*1.5*10^3-IIR digital filter design, sampling frequency of 2* pi* 1.5* 10 ^ 4, pass-band cut-off frequency of 2* pi* 1.5* 10 ^ 3
AnFPGASoftwareDefinedUltraWidebandTransceiver
- Increasing interest in ultra-wideband (UWB) communications has engendered the need for a test bed for UWB systems. An FPGA-based software-defined radio provides both postfabrication definition of the radio and ample parallel processing power. Thi
DigitalEqualizer
- After the run of the "MyEqualizer.m" file a graphical user interface appear. By pressing the "Load" we can load audio signal (type .wmv). After we can model the frequency behavior of the FIR filter that is used to filter that signal. After we can lis
zi
- 在本系统中，信息序列在先经过FSK调制，经过截止频率为25kHz的低通滤波器后（把信号频率限制在25kHz），再进入混频器搬移到更高的频率发送出去，在接收端，用与发送端同步的跳频信号对其进行变频（跳频的解跳处理在此进行），取下边频，然后进行FSK的解调-In this system, the message sequence prior through FSK modulation, through the cut-off frequency of 25kHz after low-pass fi
communication
- 针对通信侦查课题，通过已知先验知识和截获信号，进行找出同步序列，匹配滤波，校正频偏和相偏，均衡，解交织，译码，恢复出原序列，最终得到的序列与原序列作对比得到误码率为0-Investigation subject for the communication, by known a priori knowledge and intercepted signal conducted to identify the synchronization sequence, the matched filter
baseband-signal_ofdm
- 一个OFDM 基带信号，采用256点IFFT,子载波采用8PSK映射,加保护段，调制信号采用“削顶”方法降低PAPR,FIR 半带滤波，最后输出时域信号/频域响应。包含各级的视频域比较-An OFDM baseband signal, using the 256-point IFFT, the sub-carrier using 8PSK mapping, plus the protection section, the modulated signal " cut top"
IIR-filter
- matlab语言实现截止频率为100HZ的IIR滤波器-Using matlab to realize the IIR filter whose stop frequency is 100HZ
FIR-Filter
- matlab实现FIR滤波器，截止频率为10MHZ和50MHZ-Using matlab to realize the FIR filter whose stop frequency is 10MHZ and 50MHZ
Amplitude Modulation (Baseband, Passband)
- A key consequence of the usual double-sideband amplitude modulation (AM) is that the range of frequencies the signal spans (its spectral bandwidth) is doubled. Thus, the RF bandwidth of a signal (measured from the lowest frequency as opposed to 0 Hz)