GPS-L1信号频谱

ERA特征系统实现算法。寻求系统最小实现，识别模态频率和阻尼比。(ERA feature system algorithm. Minimum system seeks to achieve, identify the modal frequency and damping ratio.)

This document describes about the digital modulation techniques especially about spread spectrum.

用于调制识别的代码，通过提取特征参数，实现bpsk，qpsk等调制方式的识别(For modulation recognition code, through the extraction of characteristic parameters, implementation bpsk, qpsk forms of identification, such as modulation)

function ber_ml=Alamoudi(snr,soglia) This function simulates a Alamouti scheme. The input variables are soglia and snr. Soglia: is the number of errors after which the iterations stop. For better results, put high value of soglia, but the simulation is longer. snr: the signal to noise ratio (if u don t know what is a signal to noise ratio, well, come back to your high school!). Note: U should use this function with a main function in wich u chose different value of snr. That s because this function work just with one value of snr. If u have problem with this code, write me at m.allegritti@email.it. Take care! Max

对语音信号进行加噪，求它的功率谱，降噪处理(Adding noise to speech signal and reducing noise)

伽利略E5波段信号调制方式的设计与实现，Altboc_matlab仿真程序(Galileo E5 band signal modulation scheme design and implementation, Altboc_matlab Emulator)

lfm信号及模糊度函数,等高线图，时间分辨力 频率分辨力(lfm signal and ambiguity function, contour map, time resolution, frequency resolution)

This includes how to protect the speaker using matlab functions.

说明：  详细的OFDM设计过程，包括Matlab仿真、DSP源码及文档说明。 OFDM(正交频分复用)技术实际上是MCM(Multi-Carrier Modulation，多载波调制)的一种。(OFDM detailed design process, including the Matlab simulation, DSP source code and documentation. OFDM (Orthogonal Frequency Division Multiplexing) technology is actually MCM (Multi-Carrier Modulation, multi-carrier modulation) is.)

说明：  qam调制误码率比较,包含对16QAM、32QAM、128QAM的误码率分析，并作出误码率比较的仿真图。(QAM modulation bit error rate comparison, including 16QAM, 32qam, 128QAM bit error rate analysis, and make a bit error rate comparison simulation diagram.)