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提出了一个采用(2,1,7)卷积码+QPSK的中频调制解调方案,并在Xilinx公司的100万
门FPGA芯片上实现了该系统。该系统在信噪比SNR为6dB左右时可实现速率超过1Mbit/s、误码率
小于10-5的数据传输。
-Proposed a use of (2,1,7) convolutional code+ QPSK modulation and demodulation of the IF program, and in Xilinx' s FPGA chip one
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Matlab code for explain the relation between BER and SNR for different Modulation-Matlab code for explain the relation between BER and SNR for different Modulation
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This code is related to the course Digital Communications.
It easily reproduces the error probability
as a function of the SNR per bit for QPSK and 16-QAM systems using MATLAB
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针对LDPC码在理论和实现两方面分别进行了较深的研究。深入了解了LDPC码编码方法、译码方法以及性能等知识，重点研究了用MATLAB如何构造奇偶校验矩阵、如何编码和如何解码的算法，而且实现了在相同码率、信噪比下LDPC码性能与卷积码性能的对比。-LDPC codes for both theory and implementation were carried out deeper study. In-depth understanding of the LDPC coding method,
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基于最大似然估计的信噪比估计代码，适合所有用MATLAB做信噪比的人用。大家可以参考一下-Based on maximum likelihood estimation of SNR estimation code, suitable for all use MATLAB to do the signal to noise ratio of the use of. We can refer to
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