公开(公告)号：US5748681A

公开(公告)日：1998-05-05

申请号：US549363

申请日：1995-10-27

Applicant: Vittorio Comino ,  Gerard Joseph Foschini ,  Isam M. Habbab ,  Sanjay Kasturia ,  Jack Salz ,  Michael Edward Prise ,  Ravi Subramanian

Inventor： Vittorio Comino ,  Gerard Joseph Foschini ,  Isam M. Habbab ,  Sanjay Kasturia ,  Jack Salz ,  Michael Edward Prise ,  Ravi Subramanian

IPC: H04L7/027 ,  H04L7/04 ,  H04L7/10 ,  H04L25/06

CPC classification number: H04L25/061 ,  H04L7/046 ,  H04L7/027 ,  H04L7/041 ,  H04L7/10

Abstract: DC offset cancellation and timing recovery is provided in a homodyne receiver. The homodyne receiver demodulates an RF signal to produce a baseband signal. An initial offset correction module determines an initial DC offset of the baseband signal. An initial offset correction is applied to the baseband signal to provide an initial corrected baseband signal. Wherein, a dynamic DC offset correction module determines a dynamic DC offset. A dynamic DC offset correction is applied to the initial corrected baseband signal providing a dynamic corrected baseband signal. A timing signal is acquired from the baseband signal for synchronizing the receiver to a transmitter. A method for correcting DC offset of a baseband signal in a homodyne receiver is also described.

Abstract translation: 在零差接收机中提供DC偏移消除和定时恢复。 零差接收机解调RF信号以产生基带信号。 初始偏移校正模块确定基带信号的初始DC偏移。 对基带信号施加初始偏移校正以提供初始校正的基带信号。 其中，动态DC偏移校正模块确定动态DC偏移。 将动态DC偏移校正应用于提供动态校正基带信号的初始校正基带信号。 从用于使接收机同步到发射机的基带信号获取定时信号。 还描述了用于校正零差接收机中的基带信号的DC偏移的方法。