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1.linking of header data into .cpp in vc++
2.error correcting encoder and decoder
3.viterbi decoder in c
4.frequency modulation and demodulation in matlab
5.Performance Analysis of Weighted Median Filters in Prediction of Images
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正交频分复用技术是近年来发展起来的新技术,在高速无线数据传输领域有很大的应用前景。文章在分析和总结相关文献的基础上,介绍了正交频分复用(OFDM)技术的发展历史,讨论了正交频分复用技术的基本原理和实现方法。通过分析表明,在高速无线通信中OFDM对于消除符号间干扰(ISI),降低系统的复杂度等方面具有很大优势。正交频分复用(OFDM)是一种多载波宽带数字调制技术,它能有效地克服传输中的多径干扰和消除码间串扰,适合于高速率的地面信道视频传输。本文就OFDM技术进行了较为详尽的分析,并对OFDM的传输
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设计一个2FSK数字调制系统,要求:
(1)设计出规定的数字通信系统的结构;
(2)根据通信原理,设计出各个模块的参数(例如码速率,滤波器的截止
频率等);
(3)用Matlab或SystemView 实现该数字通信系统;
(4)观察仿真并进行波形分析;
(5)系统的性能评价。
-Design a digital modulation system 2FSK require: (1) design a digital communication system
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脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程:采样、量化与编码。
采样:低通连续信号采样,以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理,绘出信号时、频图形;带通连续信号采样,以x=sin(20*t) m=x./t 为例说明带通采样定理,绘出信号时、频图形。
量化:均匀量化,以幅度 的正弦信号为例实现为64级电平的均匀量化;非均匀量化,输入A律PCM编码器的正弦信号 ,采样序列为 ,将其进行PCM编码,给出编码器的输出码组序列
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pi/4-qdpsk调制解调程序,能有效地进行差分解调和鉴频器解调,在一些不易提取载波的场合很有用。因此,利用仿真来研究系统是必要的。-pi/4-qdpsk modulation and demodulation process, can effectively reconcile the difference solution frequency discriminator demodulation, carrier extraction in a number of difficult si
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设计一个2DPSK数字调制系统,要求:
(1)设计出规定的数字通信系统的结构;
(2)根据通信原理,设计出各个模块的参数(例如码速率,滤波器的截止频率等);
(3)用Matlab或SystemView 实现该数字通信系统;
(4)观察仿真并进行波形分析;
(5)系统的性能评价。
-Design a 2DPSK digital modulation system requirements: (1) design a digital communication sys
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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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直序扩频系统,首先基带信号通过脉冲成型,m序列扩频然后进行BPSK调制发送,接收端接收到信号加干扰和噪声,进行解调和解扩恢复原始信号。- The straight foreword wide frequency system, the first baseband signal through the pulse formation, the m sequence wide frequency then carries on BPSK the modulation transmission, t
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Modulation Index and varying carrier frequency for PWM inverter with outputs
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Matlab demonstration scr ipt for frequency modulation
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FSK modulation matlab model
frequency deviation
FSK modulacia so spojitou fazou je zalozena na frekvenciach,
t.j. ak k=f/tb a k je celociselny nasobok oboch frekvencii.
Ak k nie je celociselny nasobok, potom je to FSK modulacia s nespoji
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frequency modulation code written in matlab
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蓝牙协议语音通信matlab仿真程序,包含语音传输, I/O, CVSD speech coding, HEC, FEC, framing, GFSK Modulation, frequency hopping, 和802.11b interferer.-Simulink model of a Bluetooth communication link transmitting HV1, HV2 or HV3 voice packets. Includes wave file I/O, CVSD
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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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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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this code is used for frequency modulation in matlab
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FM调制与解调(MATLAB程序与图)
FM也是一种调制方式,即使在短波范围内的27-30MHz之间,做为业余电台、太空、人造卫星通讯应用的波段,也有采用调频(FM)方式的。-FM modulation and demodulation (MATLAB program and map) FM is a modulation, even in the short wavelength range of between 27-30MHz, as amateur radio, space, sat
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超短激光脉冲传输:展宽、色散、自自相位调制、倍频、FROG,超短脉冲测量-Ultrashort laser pulse transmission: broadening, dispersion, since the self-phase modulation, frequency, FROG, ultra-short pulse measurement
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Frequency Modulation simulation using matlab
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频率调制修改版,完整能运行,不但过程清晰,而且有图,易懂,MATLAB语言编写,实用-Modified version of frequency modulation, complete to run, not only the process clear, and there are maps, easy to understand, MATLAB language, practical
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