typical-chaotic-signal

LDPC(低密度奇偶校验码)编码是提高通信质量和数据传输速率的关键技术。LDPC码应用于实际通信系统是本课题的研究重点。编码资料(LDPC (Low Density Parity Check) codes is to improve communication quality and data transfer rates of key technologies. LDPC codes used in practical communication systems is the subject of research. Encoded data)

说明：  实现匹配滤波仿真的两个程序，每个程序生成四个图，可以通过比较验证信号的时延不影响匹配滤波的输出信噪比，及不同信号信噪比与信号波形无关，只与信号能量有关(Matched filter to achieve the two simulation procedures, each of the programs to generate the four plans, you can verify by comparing the signal delay does not affect the matched filter output signal to noise ratio, and different signal-noise ratio and signal wave has nothing to do only with the signal energy relevant)

说明：  利用短时能量和短时过零率的语音端点检测算法(Short-term energy and zero crossing rate of the voice activity detection algorithm)

说明：  退火算法程序，经典优化算法，可以找到全局较好的点。(Annealing process, the classical optimization algorithm, can find a good point overall.)

系统辨识中的多级最小二乘法，用于进行系统参数辨识(System identification in multi-level least-squares method for system parameter identification)

对输入的语音信号运用短时能量函数进行去静音，然后把去掉静音帧之后的信号进行重组。(remove the mute of the speech signal (using short-term energy function), and then remove the signal mute frame after restructuring.)

小波对信号进行多分辨率分析，提取信号特征(Wavelet multi-resolution signal analysis, signal feature extraction)

说明：  数字信号处理在电话语音拨号系统中的应用（自动拨号）(Digital signal processing in a telephone voice dialing system (automatic dialing))

理论知识是用来指导具体实践的。本文在深刻理解通信系统理论的基础上利用 MATLAB 强大的仿真功能，设计了许多具体的通信系统仿真模型。在仿真模型设计过程中，本文对模型设计的目的、具体的结构组成、仿真流程以及仿真结果都给出了具体详实的分析和说明。(Theoretical knowledge is used to guide the specific practice. In this paper, a deep understanding of the theory of communication systems using MATLAB based on the powerful simulation function, the design of a number of specific communication system simulation model. In the simulation model of the design process, this article is designed on the model, the specific structural components, simulation and flow simulation results are given specific and detailed analysis and description.)

Basic Pulse width modulation technique