- Patent Title: Dynamic sensitivity control in a near-field communication receiver
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Application No.: US16928411Application Date: 2020-07-14
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Publication No.: US11171676B2Publication Date: 2021-11-09
- Inventor: Ulrich Andreas Muehlmann , Shuli Chi , Martin Hrastnik
- Applicant: NXP B.V.
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP19189656 20190801
- Main IPC: H04B1/10
- IPC: H04B1/10 ; H04B5/02 ; H04L27/20

Abstract:
Disclosed is a method for sensitivity control in a near-field communication, NFC, device operating in a receiving mode. The method comprises calculating a threshold value, using a threshold value calculating unit, as a function of a determined current received signal strength indicator, RSSI, value, optionally a determined current gain control, GC, value, and further optionally a so-called margin value that is a product-specific parameter, and applying the calculated threshold value as a threshold parameter to a threshold comparison unit, which is configured to receive, as input. a first time-derivative signal derived from a combined output signal that is determined as a function of a digital I-channel signal output and a digital Q-channel signal output of an I&Q demodulating block, to compare the first time-derivative signal with the applied threshold parameter, and to provide a binary output that is indicative of whether the input first time-derivative signal is greater than the applied threshold parameter or not.
Public/Granted literature
- US20210036726A1 DYNAMIC SENSITIVITY CONTROL IN A NEAR-FIELD COMMUNICATION RECEIVER Public/Granted day:2021-02-04
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