16QAM_Bit_Error_Rate_(BER)_with_Gray_mapping

说明：  分数阶傅里叶法对LFM信号进行检测和参数估计的参考文献，可以参考原理。(The reference of fractional Fourier method for LFM signal detection and parameter estimation can refer to the principle.)

说明：  RA码的仿真程序，包括编码器、信道、译码器，参数可配置。(RA code simulation program, including encoder, decoder, channel, parameters can be configured.)

分析了该信号的时域、频域、倒谱，循环谱等,包括广义互相关函数GCC时延估计，这个有中文注释，看得明白。( Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. Including the generalized cross-correlation function GCC time delay estimation, The Chinese have a comment, understand it.)

多输入多输出系统不同收发天线对系统性能的影响(Multiple-input multiple-output system transceiver antenna different impact on system performance)

说明：  matlab仿真实现喷泉码，还包括对喷泉码的简单介绍(The realization of fountain code by MATLAB simulation, including a brief introduction of fountain code)

对数字通信作简要介绍，有一定参考价值，适合通信相关开发人员(Digital Communication related)

说明：  4. 试说明卷积编解码的工作原理： (1) 使用Simulink仿真卷积编码，并用Viterbi译码的方法进行解码，其中的编码、译码全部是自己编写代码(S-Function方式)，不是调用Simulink的已有编码、译码函数。 (2) 请在加性白高斯噪声信道中，画出比特信噪比与误码率的关系曲线。(4. Try to explain the working principle of convolutional codec: (1) Simulink was used to simulate convolutional coding, and Viterbi decoding method was used for decoding. The coding and decoding were all written by oneself (s-function method), rather than calling the existing coding and decoding functions of Simulink. (2) in the additive white gaussian noise channel, please draw the curve of the relationship between bit signal-to-noise ratio and bit error rate.)

BPSK仿真程序，简短有效，误码率分析，经典，快速(BPSK Simulation)

说明：  Goertzel算法是DTMF信号检测的核心,它利用二极点的IIR滤波器计算离散傅立叶变换值,快速有效的提取输入信号的频谱(Goertzel algorithm is the core of DTMF signal detection. It uses the two-pole IIR filter to calculate the discrete Fourier transform value, and extracts the spectrum of input signal quickly and effectively.)

this folder contains VIs related to USRP.