Vlc-based vector field fingerprint mapping

A mobile device comprising:

• a camera configured to obtain visible light communication signals;
• a first orientation sensor configured to obtain an indication of roll of the mobile device relative to a reference coordinate system;
• a second orientation sensor configured to obtain an indication of pitch of the mobile device relative to the reference coordinate system;
• and
• a processor communicatively coupled to the camera, to the first orientation sensor, and to the second orientation sensor and configured to:
• determine an indication of yaw of the mobile device relative to the reference coordinate system using the visible light communication signals;
• determine a transformation of a mobile-device coordinate system of the mobile device to the reference coordinate system using the indication of roll, the indication of pitch, and the indication of yaw of the mobile device relative to the reference coordinate system;
• obtain first indications of vector components of a field at a location of the mobile device, the vector components of the field defining the field;
• and
• send the first indications of vector components of the field in association with the transformation to a server;
• or
• determine second indications of vector components of the field using the first indications of vector components of the field and the transformation, the second indications of vector components of the field being indicative of vector components of the field at the location of the mobile device in the reference coordinate system, and send, to the server, the second indications of vector components of the field;
• or
• send, to the server, the first indications of vector components of the field, determine the second indications of vector components of the field using the first indications of vector components of the field and the transformation, and transmit, to the server, the second indications of vector components of the field.

A mobile device comprising:

• means for obtaining visible light communication signals;
• means for determining an indication of yaw of the mobile device relative to a reference coordinate system using the visible light communication signals;
• means for obtaining an indication of roll of the mobile device relative to the reference coordinate system;
• means for obtaining an indication of pitch of the mobile device relative to the reference coordinate system;
• means for determining a transformation of a mobile-device coordinate system of the mobile device to the reference coordinate system using the indication of roll, the indication of pitch, and the indication of yaw of the mobile device relative to the reference coordinate system;
• means for measuring first indications of vector components of a field, the vector components of the field defining the field;
• and
• means for sending, to a server, the first indications of vector components of the field and the transformation;
• or
• means for determining second indications of vector components of the field using the first indications of vector components of the field and the transformation, the second indications of vector components of the field being indicative of vector components of the field at a location of the mobile device in the reference coordinate system, and for sending, to the server, the second indications of vector components of the field;
• or
• means for sending, to the server, the first indications of vector components of the field and the transformation, for determining the second indications of vector components of the field using the first indications of vector components of the field and the transformation, and for sending, to the server, the second indications of vector components of the field.

A non-transitive, processor-readable storage medium storing processor-readable instructions configured to cause a processor to:

• obtain visible light communication signals;
• determine an indication of yaw of a mobile device relative to a reference coordinate system using the visible light communication signals;
• obtain an indication of roll of the mobile device relative to the reference coordinate system;
• obtain an indication of pitch of the mobile device relative to the reference coordinate system;
• determine a transformation of a mobile-device coordinate system of the mobile device to the reference coordinate system using the indication of roll, the indication of pitch, and the indication of yaw of the mobile device relative to the reference coordinate system;
• obtain first indications of vector components of a field, the vector components of the field defining the field;
• and
• send, to a server, the first indications of vector components of the field and the transformation;
• or
• determine second indications of vector components of the field using the first indications of vector components of the field and the transformation, the second indications of vector components of the field being indicative of vector components of the field at a location of the mobile device in the reference coordinate system, and send, to the server, the second indications of vector components of the field;
• or
• send the first indications of vector components of the field to the server, determine the second indications of vector components of the field using the first indications of vector components of the field and the transformation, and send, to the server, the second indications of vector components of the field.