公开(公告)号：US06535549B1

公开(公告)日：2003-03-18

申请号：US09395699

申请日：1999-09-14

申请人： Kenneth E. Scott ,  Elizabeth B. Olasz

发明人： Kenneth E. Scott ,  Elizabeth B. Olasz

IPC分类号： H04L2722

CPC分类号： H04L27/3872 ,  H04L7/027 ,  H04L2007/047 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0087

摘要： A method and telecommunication system for tracking the carrier phase of a received signal includes the addition of a pilot signal to the data component of the signal prior to modulation and transmission. The pilot signal is specified to have a frequency equal to the inverse of twice a data symbol interval with zero crossings positioned at the midpoint of each symbol interval to avoid interference with the data. The received signal is demodulated to produce a complex data signal from which the pilot signal is detected to provide an estimate of the phase error in the complex data signal. The elimination of the phase error from the complex data signal is accomplished through a corrective phase shift that is equal and opposite to the estimated phase error. A sample timing estimate may also be obtained in a similar manner.

摘要翻译： 用于跟踪接收信号的载波相位的方法和电信系统包括在调制和传输之前向信号的数据分量添加导频信号。 导频信号被指定为具有等于数据符号间隔两倍的频率的频率，其中零交叉位于每个符号间隔的中点处，以避免与数据的干扰。 接收的信号被解调以产生复数数据信号，从该数据信号中检测导频信号以提供复数数据信号中的相位误差的估计。 通过与估计的相位误差相等且相反的校正相移来实现从复数数据信号中消除相位误差。 也可以以类似的方式获得采样定时估计。