CHW4

双二进制信号是一种信号体制利用码间干扰作为一种控制方式而不是消除码间干扰(Duobinary signaling is a three level signaling scheme that uses intersymbol interference in a controlled way instead of trying to eliminate it. )

说明：  采用BP神经网络算法进行调制样式识别的Matlab代码(Using BP neural network pattern recognition algorithm Matlab code modulation)

原始肌肉电信号实现加噪声，频谱分析，积分肌电值求解(Muscle to achieve the original signal plus noise, spectral analysis, solving the integral EMG)

report having matlab code

safari调用第三方APP demo 可以直接调试成功 供新手参考 (safari called third-party APP demo success can be directly debug reference for the novice)

改进平方根法求解对称正定线性方程组，用matlab编写，可以在一定程度上提高求解效率。其中MRoot_squaring.m为原做法，sparse_cmp.m为二维等带宽存储，Moot_zonal.m为二维等带宽存储的平方根法求解(To improve the square root method to solve symmetric positive definite system of linear equations using matlab to prepare, to a certain extent improve the efficiency of solving. MRoot_squaring.m which the original approach, sparse_cmp.m for the two-dimensional, such as memory bandwidth, Moot_zonal.m for the two-dimensional, such as the square root of bandwidth storage method)

matlab程序，用来求解线形方程组，以函数的形式给出调用即可(matlab program for solving linear equations, given the form of a function call can)

这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模块，并统括系统性能的仿真验证了系统设计的可靠性。 (This is a relatively complete simulation of OFDM systems design, including coding, modulation, IFFT, up and down conversion, Gaussian channel model, FFT, PAPR suppression of synchronization, demodulation and decoding modules, and systems, including system performance simulation verifies the reliability of system design.)

排队买饭程序：利用队列实现，可以有好朋友一起排队。(Queuing to buy food program: the use of queues to achieve, you can have friends lined up together.)

基于阈值分割心音信号，阈值可根据信号调整，程序给出心音分割的起止位置。(Threshold-based segmentation of heart sound signals, the threshold can be adjusted according to the signal, the program gives the starting and ending positions of heart sounds segmentation.)