我在项目开发过程中搜集的各种NMEA协议文档，用于开发各种与GPS相关的项目。-I am in the project development process to collect a variety of NMEA protocol document for the development of a variety of GPS-related projects.

通信原理 模拟AM\DSB\SSB调制 matlab仿真-Communication theory analog AM \ DSB \ SSB modulation matlab simulation

本人从事GNSS模拟仿真信号源开发，在工作过程中收集一些材料，相当实用，是从事该行业的法宝。(I am engaged in the development of GNSS simulation signal source, collecting some materials in the work process, which is quite practical, and is a magic weapon in the industry.)