Invention Grant
- Patent Title: Transmitter signal injection compensation
- Patent Title (中): 变送器信号注入补偿
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Application No.: US12551495Application Date: 2009-08-31
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Publication No.: US08638836B2Publication Date: 2014-01-28
- Inventor: Pallab Midya , Rakers L Patrick , William J Roeckner
- Applicant: Pallab Midya , Rakers L Patrick , William J Roeckner
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agency: Patents and Licensing LLC
- Agent Daniel W Jeffernbruch
- Main IPC: H04B1/38
- IPC: H04B1/38

Abstract:
A transceiver mitigates signal leakage into a receive path from a transmit path. A subtraction circuit determines a difference between a receive signal and a compensation signal to produce a compensated receive signal prior to demodulation by a demodulator. An equalizer both amplitude adjusts and phase adjusts orthogonal baseband transmit signals based on the difference from the subtraction circuit to produce the compensation signal. A digital tuning circuit determines at least one amplitude adjust coefficient to be used by the equalizer. The equalizer can have a polarity switch or a variable attenuator or a variable delay.
Public/Granted literature
- US20110051833A1 TRANSMITTER SIGNAL INJECTION COMPENSATION Public/Granted day:2011-03-03
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