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该文档给出了通信原理中的数字调制和解调的matlab程序代码，如BPSK,QPSK,QAM等等调制方式。-the document is a communication principle of digital modulation and demodulation of the Matlab code. such as BPSK, QPSK, QAM modulation mode, and so on.
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一个四用户的扩频通信系统，扩频增益为N=16，采用Walsh码进行直接序列扩频，BPSK调制，无线信道为AWGN(加性高斯白噪声信道)信道(AWGN信道：不考虑通信信道信号时，由宽频范围描述的统计随机无线噪声。)。在接收端进行解扩，解调，判决，通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。,A four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct
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MATLAB program for OFDM generation and reception
This is a simple MCM communications system. The code is pretty self-explanatory. Here I have not used the cyclic prefix.
Transmitter End:
1. Generate random serial data with M symbols (RAND
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用matlab软件仿真了从卷积码编码，QPSK调制，AWGN信道，QPSK解调，以及Viterbi译码。-Using Matlab Simulate from the coding of convolutional code，Qpsk modulation ，AWGN channel ，Qpsk demodulation and Viterbi decoding。
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代码包含的主要内容是AWGN信道上BPSK,QPSK,16QAM的调制解调，以及误码率计算过程，其中还有OFDM调制在信道上传输的仿真内容-Code contains the main contents of AWGN channel BPSK, QPSK, 16QAM modulation and demodulation, and bit error rate calculation process, in which there are OFDM modulation in the cha
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几点说明：
1、source_main.m为主函数，qpsk.m和spread.m为子函数；
2、在matlab工程目录下运行source_main.m即可；
3、为方便大家理解，特以P-CCPCH信道的处理进行了举例，若大家认为资料有用的话请回帖，
我会将整个WCDMA下行信号源的matlab代码提供给需要的人；
4、为方便初学者学习，特提供了我自己开发时参考的3GPP资料，并在关键位置做了记号。
-Some explanations: 1, source_main.
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用MATLAB中的simulink对DQPSK进行仿真-Using MATLAB in the simulink simulation of the DQPSK
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本程序是对V-BLAST系统及其检测算法的仿真，可采用BPSK,QPSK,16QAM,64QAM调制。检测算法为ML，MMSE,ZF,以及采用迫零的连续干扰消除检测算法。-This program is a simulation, the V-BLAST system and its detection algorithm can be used for BPSK, QPSK, 16QAM, 64QAM modulation. Detection algorithm for the ML, M
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MATLAB中，卷积码、QPSK通过单径瑞利衰落信道的仿真，分析不同的多普勒和不同的交织块长对性能的影响。-MATLAB, the convolutional code, QPSK through a single path Rayleigh fading channel simulation, analysis of different Doppler interleaving block length and different impact on performance.
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本内容详细的讲解了各种QPSK的相关原理以及matlab源代码，英文版的，欢迎大家下载参阅-The detailed explanation of the underlying principles as well as a variety of QPSK matlab source code, in English, are welcome to download See
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a Matlab code that produces a plot of probability of bit error rate for QPSK versus SNR for three receive antennas, and three different combining methods: MRC, equal gain combining, and selection combining. The plot is generated by using Monte Carlo
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QPSK的调制解调源码，matlab编程，在高斯噪声的影响下-Under the QPSK modulation and demodulation code, matlab program, the impact of the Gaussian noise
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MATLAB文件。《超宽带无线电基础》配套程序，第二章第3个例程。用于产生QPSK编码。-MATLAB file. Ultra-wideband radio base matching program, the first chapter of a routine. QPSK for generating code.
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这个是空时编码组的qpsk代码调制所需要的MATLAB程序，所实现的是qpsk调制-This is qpsk Code Modulation group of space-time coding required MATLAB program, the implementation is qpsk modulation.
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matlab环境下的窃听信道建模，包括crc校验编码，三种（QPSK,16QAM,64QAM）不同的调制方式仿真，加入扰码增强抗窃听能力。-Matlab environment eavesdropping channel modeling, including the CRC check code, three kinds of (QPSK, 16 qam and 64 qam) different modulation mode simulation, join the scrambler e
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pi4qpsk的付费论文，讲的非常详细和深入(The MATLAB code of biting tail convolutional code is very detailed and thorough.)
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