US 2026/0303138 A1 · REAL-TIME HARDWARE-BASED DIGITAL COMPENSATION OF BASEBAND GAIN CHANGES FOR NFC RECEIVER

Abstract

Applicant submits herewith an amendment to the Abstract of the Specification with markings showing all the changes relative to the Abstract in the filed application. The proposed method improves dynamic range utilization of the ADC unit by adjusting the amplifier gain and a reference gain level used to compensate the amplifier gain adjustment, based on a saturation status of the ADC unit. An update of the reference gain level is performed according to the gain change of the analog amplifier of the received signal and the recent ADCs saturation status. This provides a technical advantage by ensuring that the decoded signal remains steady when the amplifier gain is adjusted, thus maintaining signal integrity. This may help to achieve a more or less steady output in all circumstances. Resulting therefrom, the signal to be decoded is kept constant. This may be useful, when the received signal is strong and the ADC unit is saturated despite adaptation of gain.

Claims20

Dependent claims

A method of operating an NFC receiver system the NFC receiver system comprising one or more channels, the method comprising:

supplying output signals from an analog amplifier unit to an ADC unit;
providing digital signals (I, Q) by the ADC unit and checking the digital signals (I, Q), wherein in a case that the digital signals (I, Q) result from a level above a specified threshold of gain reduction of the analog amplifier unit a gain of the analog amplifier unit is reduced;
checking if the ADC unit is saturated, wherein in a case that the ADC unit is saturated, the gain of the analog amplifier unit is reduced and a specified gain reference is updated;
wherein in a case that the ADC unit is not saturated, the gain of the analog amplifier unit is reduced and the specified gain reference (BBA ref) is left unamended;
and
generating a compensation signal (BBA shift) from the gain of the analog amplifier unit and the specified gain reference (BBA ref), wherein the compensation signal (BBA shift) is used to process the ADC signals (I, Q) in order to provide compensated digital signals (Icorr, Qcorr) having essentially steady amplitudes.

3 more elements

A device for operating an NFC receiver system comprising:

one or more processors configured to:
supply output signals from an analog amplifier unit to an ADC unit;
provide digital signals (I, Q) by the ADC unit and checking the digital signals (I, Q), wherein in a case that the digital signals (I, Q) result from a level above a specified threshold of gain reduction of the analog amplifier unit, a gain of the analog amplifier unit is reduced;
check if the ADC unit is saturated, wherein in a case that the ADC unit is saturated, the gain of the analog amplifier unit is reduced and a specified gain reference (BBA ref) of the analog amplifier unit is updated;
wherein in a case that the ADC unit is not saturated, the gain of the analog amplifier unit is reduced and the specified gain reference (BBA ref) is left unamended;
and
generate a compensation signal (BBA shift) from the gain of the analog amplifier unit and the specified gain reference (BBA ref), wherein the compensation signal (BBA shift) is used to process the ADC signals (I, Q) in order to provide compensated digital signals (Icorr, Qcorr) having essentially steady amplitudes.

4 more elements

Dependencies are inferred from the claim text.

Real-time hardware-based digital compensation of baseband gain changes for nfc receiver

Life of this patent

Real-time hardware-based digital compensation of baseband gain changes for nfc receiver

Life of this patent

Abstract

Claims20