Online tuning of a touch device processing algorithm

A system in a touch device configured to communicate with a pen, the system comprising:

• an antenna array configured to detect signals in an array grid of sensing elements in the antenna array while the pen is proximate to the touch device;
• and
• a processing circuit, electrically coupled to the antenna array, configured to execute a processing algorithm to process the detected signals;
• the processing circuit configured to execute an online tuning algorithm to perform online tuning of the processing algorithm based on the detected signals by online tuning at least one parameter of the processing algorithm to create an online-tuned processing algorithm;
• wherein the processing circuit is configured to:
• perform conditional processing of the detected signals based on at least one online tuning condition being met, and
• perform the online tuning of the at least one parameter based on the conditional processing of the detected signals;
• and
• wherein to perform the conditional processing, the processing circuit is configured to:
• estimate a distance of the pen from the touch device based on the detected signals,
• aggregate signal statistics for the detected signals responsive to the estimated distance meeting predetermined tolerances, and
• tune the at least one parameter based on the aggregated signal statistics by generating at least one tuned parameter.

A method implemented in a touch device comprising an antenna array configured to communicate with a pen, the method comprising:

• detecting signals in an array grid of sensing elements in the antenna array while the pen is proximate to the touch device;
• processing the detected signals using a processing algorithm;
• and
• performing online tuning of the processing algorithm based on the detected signals by online tuning at least one parameter for the processing algorithm, said performing comprising:
• calculating an online tuned parameter for the processing algorithm based on at least one signal of the detected signals,
• validating the online tuned parameter according to an online test, and
• in response to the validating the online tuned parameter, process further signals detected by the antenna array based at least on the online-tuned processing algorithm that implements the online tuned parameter.

A method implemented in a touch device comprising an antenna array configured to communicate with a pen, the method comprising:

• detecting signals in an array grid of sensing elements in the antenna array while the pen is proximate to the touch device;
• processing the detected signals using a processing algorithm;
• and
• performing online tuning of the processing algorithm based on the detected signals by tuning at least one parameter for the processing algorithm;
• wherein performing the online tuning comprises:
• performing conditional processing of the detected signals based on at least one online tuning condition being met, and
• performing the online tuning of the at least one parameter based on the conditional processing of the detected signals;
• and
• wherein the conditional processing comprises:
• estimating a distance of the pen from the touch device based on the detected signals,
• aggregating signal statistics for the detected signals responsive to the estimated distance meeting predetermined tolerances, and
• tuning the at least one parameter based on the aggregated signal statistics by generating at least one tuned parameter.

A computer-readable storage medium having program instructions recorded thereon that, when executed by a processing circuit of a touch device that comprises an antenna array configured to communicate with a pen, implement a method comprising:

• detecting signals in an array grid of sensing elements in the antenna array while the pen is proximate to the touch device;
• processing the detected signals using a processing algorithm;
• and
• performing online tuning of the processing algorithm based on the detected signals by tuning at least one parameter for the processing algorithm, said performing comprising:
• calculating an online tuned parameter for the processing algorithm based on at least one signal of the detected signals,
• validating the online tuned parameter according to an online test, and
• in response to the validating the online tuned parameter, process further signals detected by the antenna array based at least on the online-tuned processing algorithm that implements the online tuned parameter.

A computer-readable storage medium having program instructions recorded thereon that, when executed by a processing circuit of a touch device that comprises an antenna array configured to communicate with a pen, implement a method comprising:

• detecting signals in an array grid of sensing elements in the antenna array while the pen is proximate to the touch device;
• processing the detected signals using a processing algorithm;
• and
• performing online tuning of the processing algorithm based on the detected signals by online tuning at least one parameter for the processing algorithm;
• wherein performing the online tuning comprises:
• performing conditional processing of the detected signals based on at least one online tuning condition being met, and
• performing the online tuning of the at least one parameter based on the conditional processing of the detected signals;
• and
• wherein the conditional processing comprises:
• estimating a distance of the pen from the touch device based on the detected signals,
• aggregating signal statistics for the detected signals responsive to the estimated distance meeting predetermined tolerances, and
• tuning the at least one parameter based on the aggregated signal statistics by generating at least one tuned parameter.