LFM信号及回波的生成，时域及频谱分析，模糊度函数分析，时频分析，匹配滤波器能量检测、循环相关检测、及fmusic参数估计-LFM signal and the echo generation, time domain and spectral analysis, ambiguity function analysis, time-frequency analysis, the matched filter energy detection, loop correlation detection

客户端之间发送PING报文，客户端接受其他客户端的PING报文，回复信息。 个人想法：通过UDP连接，客户端与服务器建立连接，登录只要用户名（不能重复），能从服务器查询在线用户。-There are four main components to phase 2: 1) Add functionality to send “ping” messages over UDP and listen for echo responses, in order to

Simple echo server based on a listening pp::TCPSocket. This server handles just one connection at a time and will echo back whatever bytes get sent to it. -Simple echo server based on a listening pp::TCPSocket. This server handles just one connec