pieflab

此代码仿真了一个语音输入输出系统，语音信号经过AD转换后，经过DSSS调制解调后，通过DA转换还原输入的声音，每一步的的波形都可以观测，对实际DSSS系统设计有很大的参考价值(This code simulation of a voice input and output systems, speech signal after AD conversion after DSSS modem through DA conversion to restore the input voice, each step of the waveform can be observed, the actual design of DSSS systems have great reference value)

calculating secant Value

。概括 了数字水印的研究现状和基本原理, 分析了基于小波变换的数字水印算法的优势, 阐述了小波 域水印嵌入与提取的过程, 最后由Matlab 仿真实现, 结果证明基于小波变换的数字水印具有较 强的掩蔽性和鲁棒性。(generalization The research status and the digital watermarking technology, analyzes the basic principle based on wavelet transform the advantage of digital watermarking algorithm, this paper expounds the wavelet Domain watermarking embedding and extracting process, finally by Matlab simulation results show the based on wavelet transform digital watermarking has more Strong masking and robustness. )

PSO算法声纹识别整体程序代码，适合DSP硬件(Voiceprint identification of the overall code)

OFDM比较经典的源码程序，包含了整个系统的仿真，及性能的分析(OFDM more classic source programs, including the simulation of the entire system, and performance analysis)

包括：使用控制变量蒙特卡洛法和一般蒙特卡洛法的欧洲期权看涨价格程序；使用蒙特卡洛计算定积分；使用B-S公式计算期权价格。 ( Including: European call options price procedure using control variable Monte Carlo method and general Monte Carlo method using Monte Carlo calculation of definite integral use the B-S formula to calculate the price of option.)

关于神经网络的matlab源程序，程序内有详细的注释。(About neural network matlab source program with detailed notes.)

一篇有关TDDLTE的频率同步的文章，介绍了LTE的帧结构，及相关频率同步的方法(An article about the frequency of synchronous TDDLTE article introduces the LTE frame structure, and related method of frequency synchronization)

基于matlab的Turbo码仿真，并绘出BER曲线(Turbo decode and encode by matlab)

说明：  凸规划建模系统,包含用户手册，有助于学习压缩感知。(Convex programming modeling systems, including user manuals, helpfull for learning compressed sensing .)