BPSK基于平方谱和四次方谱的载频估计，可以用于BPSK 16QAM MSK信号的载频估计。-BPSK carrier frequency estimation based on square spectrum and fourth power spectrum, can be used for 16 qam MSK BPSK signal carrier frequency estimation

4QAM、16QAM、32QAM、64QAM、128QAM、256QAM星座图映射，map、频偏估计算法-4QAM, 16QAM, 32QAM, 64QAM, 128QAM, 256QAM constellation mapping, map, frequency offset estimation algorithm