Invention Grant
- Patent Title: Dynamic range extended interference canceler
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Application No.: US14879584Application Date: 2015-10-09
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Publication No.: US09859992B1Publication Date: 2018-01-02
- Inventor: Gregory Deed Hogerheiden
- Applicant: Exelis Inc.
- Applicant Address: US FL Melbourne
- Assignee: Harris Corporation
- Current Assignee: Harris Corporation
- Current Assignee Address: US FL Melbourne
- Agency: Edell, Shapiro & Finnan LLC
- Main IPC: H04B1/00
- IPC: H04B1/00 ; H04B15/06 ; H04B1/525

Abstract:
A multi-tier interference canceler includes a first canceler, a second canceler, and a third canceler. The first canceler samples radio frequency (RF) interference generated from a linear signal using a non-linear process. The RF interference includes linear interference and non-linear interference. The first canceler cancels the linear interference from the sampled RF interference based on the linear signal to produce a first non-linear interference sample. The second canceler receives an amplitude scaled, time-shifted version of the RF interference and cancels the linear interference from the received RF interference based on the linear signal to produce a second non-linear interference sample. The third canceler cancels the non-linear interference from the second non-linear interference sample using the first non-linear interference sample, to produce a receive signal that is substantially free of the non-linear interference and the linear interference.
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