Communications modulation in wireless power receiver with multi-coil receiver antenna

A wireless power receiver system comprising:

• a receiver antenna including a plurality of receiver coils, each of the plurality of receiver coils configured to receive alternating current (AC) wireless power signals from a wireless power transmission system;
• a receiver controller configured to generate communications signals by determining a message signal that includes one or more message words and encoding the one or more message words into one or more encoded message words of an encoded message signal based on a coding format, wherein the encoded message signal is encoded using a pulse width encoding scheme, and wherein the coding format correlates each of a plurality of correlated ratios, respectively, with one of a plurality of format words, each of the plurality of correlated ratios corresponding to one of the plurality of format words;
• and
• a plurality of modulation circuits, each of the plurality of modulation circuits operatively associated with one of the plurality of receiver coils and the receiver controller, each of the plurality of modulation circuits configured to partially dampen a magnetic field, coupling the wireless power receiver system with the wireless power transmission system, based on the communication signals provided to each of the plurality of modulation circuits by the receiver controller.