Invention Grant
US08693598B2 Radio receiver with mitigation modules and mixers with phase compensation 有权
带缓解模块的无线电接收器和具有相位补偿的混频器

Radio receiver with mitigation modules and mixers with phase compensation
Abstract:
Example embodiments of the systems and methods of dynamic spur mitigation for wireless receivers disclosed herein comprise one or more of a detection module for detecting the presence of a spur and a determination of its frequency, a complex notch filter chain, and a frequency locked loop which ensures that the input spur is notch filtered even if it drifts after detection. When a spur is detected, the frequency of the tone is determined. The spur is then filtered, for example using a phase rotator and a DC separator. The phase rotation is removed in a subsequent stage. The non-DC component from the DC separator is used to track the spur to compensate for any shifting or drifting in the spur.
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