估计时间

• And it presents an estimation method for frequency difference by means of data synchronization selecting the time window of afc frequency difference estimation hi order to solve the problem that data symbol transition induces an enormous error of frequency difference estimation
  针对afc频差估计中数据突变引起频差估计较大误差的问题，提出了利用数据符号同步对afc频差估计时间窗口选择的afc频差估计方法。