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调频发射机,(1) 在发射频率范围内,预置5个频率点,用手动方式选择其中一个发射
(2) 进一步提高通信距离;
(3) 调制失真不大于10
(4) 10.(4)其他特色与创新。
-FM Transmitter, (1) in the firing frequency range, the preset frequency of 5 points manually select one of the launch (2) further enhance the communica
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本程序主要是对CSRZ-8DPSK进行调制,并仿真出时域图、相位图、相位差图以及频谱图。-The program mainly for CSRZ-8DPSK modulation and time domain simulation diagram, phase diagram, phase diagram and the frequency spectrum.
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提取调制信号2ASK的瞬时幅度、瞬时相位、瞬时频率-2ASK modulation signal extracted instantaneous amplitude, instantaneous phase, instantaneous frequency
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CC1100是一种低成本真正单片的UHF收发
器,为低功耗无线应用而设计。电路主要设
定为在315、433、868和915MHz的ISM(工
业,科学和医学)和SRD(短距离设备)频
率波段,也可以容易地设置为 300-348
MHz、400-464 MHz和800-928 MHz的其他
频率。
RF 收发器集成了一个高度可配置的调制解
调器。这个调制解调器支持不同的调制格
式,其数据传输率可达 500kbps。通过开启
集成在调制解调器上的前
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this .rar file is dedecated to the beginers in the communications and digital signal processing fileds :
1. simple amplitude modulation
2. Disictete Fourier Transform
3. plotting the digital symbols
4. Digital Data Representation
5. Digital
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A multiple-input multiple-output (MIMO) communication system combined with the orthogonal frequency division multiplexing (OFDM) modulation technique can achieve reliable
high data rate transmission over broadband wireless channels. Channel state i
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51单片机开发的NRF24l01
产品性能:
1) 2.4GHZ全球开放ISM频段免许可使用
2) 最高工作速率1Mbps,GFSK高效调制
3) 125个频道满足多点通讯和跳频通讯需求
4) 1.9-3.6V工作,低功耗,待机模式仅1uA.
5) 双通道数据接收,内置环行天线,体积仅17*34mm,通信距离在100m之内,软件编简单。
7) 内置硬件8/16位CRC校验,收发中断标志,每次可发28字节
备注:1。免费提供开发源代码
2。提供全面技术支持和即
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附件中包括:
1.叉积自动频率控制(CPAFC)matlab源代码cpafc.m
2.相应的am调制的测试信号am.dat ,载波500Hz,采样8000,调制信号50Hz,32 位float-Accessories include: 1. Cross product auto frequency control (CPAFC) matlab source code cpafc.m 2 . corresponding test signal modulation am am.dat,
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computing the SNR loss due to frequency offset in OFDM modulation
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本文介绍了在SPWM 调制中TM S320F240 数字信号处理
芯片的使用, 利用双极式
等面积脉宽调制波的算法, 产生不同频率的SPWM 波, -This article describes the SPWM modulation TM S320F240 digital signal processing
The use of the chip, the use of bipolar
Equal area PWM wave algorithm to generate SP
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实现FSK调制,由计算机随机产生二进制码元,可自主更改载频频率同时可以加入不同信噪比的白噪声。-Achieve FSK modulation, the binary code randomly generated by a computer element, change the carrier frequency can be independently the same time can be added to the white noise of different signal to n
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高斯函数调制的源程序代码,频率为2.5Mhz-Gaussian function of the source code modulation frequency of 2.5Mhz
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蓝牙通信模块:包含了输入输出、语音编码、前向纠错、GFSK调制、跳频等-Simulink model of a Bluetooth communication. Includes I/O, speech coding, FEC, GFSK Modulation, frequency hopping, and so on.
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QPSK的调制和解调,画出时域和频域的对比图,非常完整,绝对可用-QPSK modulation and demodulation, and draw the time-domain and frequency domain comparison chart, very complete, absolutely free
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一、 本程序采用16QAM调制方式,对一串2进制信源进行调制,用升余弦滚降函数进行基带调制,再调到高频信道;在信道上加入高斯白噪声,运用匹配滤波器解调,画出解调星座图,运用最小欧氏距离译码判决,计算误比特率。-First, the program uses 16QAM modulation, the source of a string of two binary modulation, with the Raised Cosine modulated baseband functions, a
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扩频通信系统仿真 ——系统将基带信号(即信息)的频谱扩展至很宽的频带上,然后再进行传输,即将欲传输的信息数据用伪随机序列编码调制,实现频谱扩展,然后通过信道编码发送出去;接收端采用与发送端完全相同的伪随机序列作为本地解扩信号进行相关处理,以恢复信息,最后进行解调,完成整个系统的接收。-Simulation of spread spectrum communication system- the system baseband signal (ie, information) be extende
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用不同的算法来实现SPWM脉宽调制变频器,用了等面积法,不对称和对称采样法,自然采样法1-Use different algorithms to achieve SPWM pulse width modulation frequency, with the other area of law, asymmetric and symmetric sampling, natural sampling 1
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使用数值仿真和电路实验的方法,对Q PSK ( quadrature phase shift key ing)和OQ PSK ( off2
set quadrature phase shift keying)调制信号通过功率放大器后的频谱扩散问题进行了探讨。-Numerical simulation and circuit experiment using the method of Q PSK (quadrature phase shift key ing) and OQ PSK (off
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随着信息容量的增加和频率资源的稀缺,为提高单位频带利用率,在微波通信系统中越来越多地采用多电平多相位的复杂信号调制方式,尤其是正交幅度调制(QAM)得到了大量的应用,从早期的4QAM到今天的16QAM。高阶QAM调制大容量数字微波通信系统为了保证服务质量,降低误码率,-long with the increase of information capacity and frequency resource scarcity, for improving the utilization ratio
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单载波频域均衡的完全编码,包括了调制解调,独特字,传输模拟,信道估计,频域均衡器设计等等完全的理论。-Single-carrier frequency domain equalization, including modulation/demodulation, unique words, transmission simulation, channel estimation, frequency-domain-equalizer design, etc.
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