US 2019/0103925 A1Published application

Wireless signal noise reduction

AssigneeSquare, Inc.

InventorsJeremy Wade, Afshin Rezayee

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Abstract

A payment terminal has a clock management unit for providing clock signals to components of the payment terminal. The payment terminal also has a wireless communication interface for communicating wireless signals. A processing unit of the payment terminal may monitor operation of a wireless communication interface of the payment terminal and, when the payment terminal is communicating wirelessly, modify an initial clock signal provided to one or more components of the payment terminal that emit RF noise to modify a frequency at which the RF noise occurs. When the payment terminal is no longer transmitting, the processing unit may provide the initial clock signal to the RF noise source.

A method for coordinating operations between a radio frequency (RF) communications source and a RF noise source of a transaction processing device, comprising:

executing instructions, by a processing unit of the transaction processing device, to determine that the RF communications component is communicating at a first RF communications frequency, wherein the RF communications component comprises a near field communication (NFC) transponder or a Bluetooth transponder;
identifying, by the processing unit, an operating frequency of the RF noise source, wherein the RF noise source comprises one or more of the processing unit or a touch-screen display, wherein the operating frequency of the RF noise source is based on a clock signal, wherein the clock signal has an initial clock frequency, and wherein the RF noise source performs a set of standard operations at the operating frequency;
identifying, by the processing unit, one or more noise frequencies of the RF noise source based on the operating frequency of the RF noise source;
executing instructions, by the processing unit, to determine that the one or more of the noise frequencies interferes with the first RF communications frequency;
modifying, by the processing unit, based on the determination that the one or more of the noise frequencies interferes with the first RF communications frequency, the clock signal from the initial clock frequency to a modified clock frequency, wherein a modified operating frequency is based on the modified clock frequency, wherein one or more modified noise frequencies are based on the modified operating frequency, and wherein none of the one or more modified noise frequencies interfere with the first RF communications frequency;
performing, by the RF noise source, a modified set of operations at the modified operating frequency;
executing instructions, by the processing unit, to determine that the RF communications component is no longer communicating at the first RF communications frequency;
restoring, by the processing unit, the clock signal from the modified clock frequency to the initial clock frequency based on the determination that the RF communications component is no longer communicating at the first RF communications frequency;
and
performing, by the RF noise source, the standard operations at the operating frequency based on the modification of the clock signal to the initial clock frequency.

7 more elements

Facts

Application

15/721,855Filed 30 Sep 2017

Published

4 Apr 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04B 15/00
Suppression or limitation of noise or interference
G06Q 20/202
Point-of-sale [POS] network systems: interconnection or interaction of plural electronic cash registers [ECR] or to host computer, e.g. network…
G06Q 20/326
Using wireless devices: payment applications installed on the mobile devices
G06Q 20/3278
Short range or proximity payments by means of M-devices: rFID or NFC payments by means of M-devices

Abstract

Claims31