公开(公告)号：US09160465B2

公开(公告)日：2015-10-13

申请号：US14074355

申请日：2013-11-07

Applicant: Silicon Laboratories Inc.

Inventor： Guner Arslan

IPC: H03D1/04 ,  H04B15/04

CPC classification number: H04B15/04 ,  H04B15/06

Abstract: Spur cancellation systems and related methods are disclosed for radio frequency (RF) receivers and other implementations. Disclosed embodiments effectively remove spurs caused by digital clock signals or other spur sources by determining which spurs will fall within a channel selected to be tuned, utilizing a spur cancellation module to generate a cancellation signal, and subtracting this cancellation signal from the digital information. The cancellation signal can be initially generated with a known frequency and estimated values for unknown spur parameters, such as amplitude and phase. Digital feedback signals are then used to adjust the spur parameters. If the spur frequency is not known precisely, digital feedback signals can also be used to adjust the frequency of the cancellation signal. Where multiple receive paths are provided within a multi-receiver system, multiple spur cancellation modules can be used to remove spurs generated by digital clocks within each of the receive paths.

Abstract translation: 针对射频（RF）接收机和其他实施方式公开了支线消除系统和相关方法。 公开的实施例通过使用支线消除模块来产生消除信号，并且从数字信息中减去该消除信号，有效地消除了由数字时钟信号或其他辅助信号源引起的杂波，通过确定哪些杂散落入被选择调谐的信道内。 最初可以用已知频率和未知支线参数的估计值（例如振幅和相位）来生成抵消信号。 然后使用数字反馈信号来调整支线参数。 如果杂散频率不准确，数字反馈信号也可用于调整消除信号的频率。 在多接收机系统内提供多个接收路径的情况下，可以使用多个分支消除模块来去除每个接收路径内的数字时钟产生的杂散。