Invention Grant
US09231637B2 Adaptive DC offset cancellation for direct conversion RF receivers
有权
用于直接转换射频接收机的自适应直流偏移消除
- Patent Title: Adaptive DC offset cancellation for direct conversion RF receivers
- Patent Title (中): 用于直接转换射频接收机的自适应直流偏移消除
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Application No.: US14085236Application Date: 2013-11-20
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Publication No.: US09231637B2Publication Date: 2016-01-05
- Inventor: Tao Li , Hans Wang , Binglei Zhang , Shih Hsiung Mo
- Applicant: Aviacomm Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: AVIACOMM INC.
- Current Assignee: AVIACOMM INC.
- Current Assignee Address: US CA Sunnyvale
- Agency: Park, Vaughan, Fleming & Dowler LLP
- Agent Shun Yao
- Main IPC: H04L25/10
- IPC: H04L25/10 ; H04B1/30

Abstract:
One embodiment of the present invention provides a system for performing DC offset cancellation for a wireless receiver that includes one or more amplification stages between a demodulator and a baseband digital signal processor (DSP). During operation, the system calibrates values of static DC offset associated with a plurality of gain settings for at least one amplification stage, stores the calibrated DC offset values in a lookup table, receives a current gain setting for the amplification stage, maps a DC offset value from the lookup table based on the current gain setting, and cancels static DC offset for the amplification stage using the mapped DC offset value.
Public/Granted literature
- US20140148114A1 ADAPTIVE DC OFFSET CANCELLATION FOR DIRECT CONVERSION RF RECEIVERS Public/Granted day:2014-05-29
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