System and methods for multi-frequency capacitive sensing with low ground mass (lgm) mitigation

A method for capacitive touch sensing, comprising:

• detecting, by a processing system, using a plurality of electrodes corresponding to a sensing region, low ground mass (LGM) compensation information based on multiple input objects being present in the sensing region, wherein detecting the LGM compensation information comprises:
• driving a first transmitter electrode of the plurality of electrodes with a first sensing signal having a first frequency and a second transmitter electrode of the plurality of electrodes with a second sensing signal having a second frequency different from the first frequency;
• and
• obtaining resulting signals based on the first and second sensing signals having the first and second frequencies via at least one receiver electrode of the plurality of electrodes;
• obtaining, by the processing system, a two-dimensional capacitive touch profile for the multiple input objects in the sensing region;
• and
• performing, by the processing system, LGM compensation on the two-dimensional capacitive touch profile using the detected LGM compensation information.

A non-transitory computer-readable medium having processor-executable instructions stored thereon for capacitive touch sensing, wherein the processor-executable instructions, when executed, facilitate performance of the following:

• detecting, by a processing system, using a plurality of electrodes corresponding to a sensing region, low ground mass (LGM) compensation information based on multiple input objects being present in the sensing region, wherein detecting the LGM compensation information comprises:
• driving a first transmitter electrode of the plurality of electrodes with a first sensing signal having a first frequency and a second transmitter electrode of the plurality of electrodes with a second sensing signal having a second frequency different from the first frequency;
• and
• obtaining resulting signals based on the first and second sensing signals having the first and second frequencies via at least one receiver electrode of the plurality of electrodes;
• obtaining, by the processing system, a two-dimensional capacitive touch profile for the multiple input objects in the sensing region;
• and
• performing, by the processing system, LGM compensation on the two-dimensional capacitive touch profile using the detected LGM compensation information.