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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
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正交频分复用(OFDM)的调制与解调以及OFDM的误码率。-Orthogonal Frequency Division Multiplexing (OFDM) modulation and OFDM demodulation and bit error rate.
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调制进制:载波频率:信道信噪比
两载频的差值:信道信噪比-Band modulation: carrier frequency: channel SNR difference between the two carrier frequencies: Channel SNR
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TCM是把纠错编码与调制相结合的一种技术,将编码与调制作为一个整体同时进行处理,既有纠错能力又有频带压缩能力,基本原则是利用信号集的冗余度来提高纠错能力,从而在不扩展占用频带的前提下提高编码增益。这样就可以在传输功率和带宽都不变的同时提高数字传输系统的可靠性。-TCM is the error correction coding and modulation of a combination of technology, coding and modulation processing as a
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基于MATLAB的语音信号的调制和解调,包括画出各个阶段的语音时域和频域图形-Matlab-based voice signal modulation and demodulation, including draw stages of time domain and frequency domain speech
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基于MATLAB的 SSB调制解调实现.利用MATLAB集成环境下的M文件,编写程序来实现SSB的调制解调,并绘制出解调前后的时域和频域波形及叠加噪声时解调前后的时频波形,根据运行结果和波形来分析该解调过程的正确性及信道对信号传输的影响。-MATLAB-based SSB modulation and demodulation to achieve. Advantage of MATLAB M-files integrated environment, programming to achiev
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包含OFDM系统所有模块,采用高斯信道,可调整频偏,采用32QAM调制方式-Contains all modules of the OFDM system, using the Gaussian channel, adjustable frequency offset, the use of 32QAM modulation mode
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直接序列扩频Matlab程序源码 直接序列扩频通信能有效地抵抗来自信道中的窄带干扰。在一个直扩通信系统中,扩频是通过伪噪声序列(PN)对发送的信息数据进行调制来实现的。在在接收端,原伪噪声序列与所收信号的的相关运算可将窄带干扰扩展到DS信号的整个频带,使干扰等效为幅度较低频谱较平坦的噪声;同时,将DS信号解扩,恢复原始信息数据。 可直接使用。
-Direct Sequence Spread Spectrum Matlab program source code direct sequence
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OFDM是一种新型的调制方式,称为正交频分复用。阐述了OFDM的原理、系系统组成和优良性质及其在数字电视传输和混合光纤电缆网(HF,C)中的应用。
-OFDM is a new type of modulation called orthogonal frequency division multiplexing. Elaborated the principle of the OFDM, the composition and good nature of the particle sys
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单载波频域均衡 MMSE psk调制 matlab环境-Single-carrier frequency domain equalization MMSE psk modulation matlab environment
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对已知信号进行SSB调制,然后观察其频率域特性-Known signal SSB modulation, and then observe its frequency domain characteristics.
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16QAM的Matlab仿真程序,不仅仅是依照通信原理课本的框图编写,还加上此种调制方式在Ka频段的受天气影响的性能仿真-16 QAM of Matlab simulation program, is not only in accordance with the principle of communication of the block diagram of textbook compilation, and the modulation mode in Ka frequency band
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qpsk解调与调制 包括滤波器 环路滤波器等多个过程内容-carrier frequency for modulation and demodulation
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信号幅度调制的方法;用时域和频域的方式表示幅度调制的结果。
-Signal amplitude modulation method time-domain and frequency domain representation of amplitude modulation of the results.
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载频为10HZ、采样速率为40HZ的fsk信号的产生和调制-The carrier frequency the 10HZ, sampling rate 40HZ fsk signal generation and modulation
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详细描述MSK信号的产生 调制 以及噪声影响 加入了中频载波 对于研究通信信道有一定帮助-Detailed descr iption of MSK modulation signal is produced and the noise affect joined the intermediate frequency carrier for research communication channel have certain help
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相参脉冲串复调制信号,线性调频脉冲串复调制信号,线性调频步进频率脉冲串复调制信号,步进频率脉冲串复调制信号-String complex modulation signals coherent burst complex modulation signal, chirp, chirp stepping frequency bursts complex modulation signal, step frequency bursts complex modulated signals
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VB写的教学用的信号频率生成器的源代码,有的称为信号调制模拟器,用来模拟2ASK、2FSK信号的调制过程,可供娱乐或教学;全部用的VB的算法,对学习算法也有帮助 。-The frequency of the signal generator source code written in VB teaching, some called signal modulated simulator, used to simulate 2ASK, 2FSK signal modulation proc
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包括ask信号的发送接收全过程,包括调制解调,多节传输,频域时域的分析-Ask the signal transmission and reception of the entire process, including modulation and demodulation, the multi-cell transmission, the frequency domain to the time domain analysis
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数字通信中的多普勒频偏估计技术研究,采用开环大频偏估计算法,调制是4/pi_DQPSK-Doppler shift estimation in digital communications technology, the use of open-loop large frequency offset estimation algorithms, modulation is 4/pi_DQPSK
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