Invention Grant
- Patent Title: Systems and methods for digital correction with selective enabling in low intermediate frequency (IF) receivers
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Application No.: US16596576Application Date: 2019-10-08
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Publication No.: US10862729B1Publication Date: 2020-12-08
- Inventor: Claudio Gustavo Rey
- Applicant: NXP USA, Inc.
- Applicant Address: US TX Austin
- Assignee: NXP USA, Inc.
- Current Assignee: NXP USA, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: H04L27/36
- IPC: H04L27/36 ; H04L27/38 ; H03D3/00 ; H04L27/20

Abstract:
The embodiments described herein provide systems and methods for digital correction in low intermediate frequency (IF) receivers. Specifically, the embodiments described herein use digital correction techniques that can correct for signal distortions in low IF receivers caused by I-Q imbalance, including both I-Q magnitude imbalance and I-Q phase imbalance. In general, the embodiments described herein are implemented to at least partially cancel an image of a blocking signal in the complex digital signal. Such a cancellation can be implemented to at least partially cancel an image of blocking signal where that image occurs at or near the intermediate frequency. In one embodiment, a corrector is implemented in a low RF receiver and is configured to receive a complex digital signal that includes an image of a blocking signal. Such a low RF receiver can further include a corrector controller to selectively enable the corrector.
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