用socket实现DNS查询,不过解包部分自己得写,用抓包工具看下就知道怎么解了-DNS queries with the socket implementation, but was unpacking some of his writing, using Ethereal tool Kanxia to know how to resolve financial
说明: 双极性NRZ经余弦滚降LPF作为信号,2ASK带通调制,相干解调,各步骤波形(Bipolar NRZ is used as signal through cosine roll off LPF, 2ASK band-pass modulation, coherent demodulation, and waveforms of each step.)