I was wondering what energy efficient protocol should I use for a FSK modulation in a steel conductor. My limitation is on the number of continuous bits I can transmit due to the charging and discharging of the capacitor, and the circuit is battery operated. From my testing I can only transmit a byte at a time with a delay of 200us before a transmission of the next byte.
For a byte communication, the protocol I was considering is to use start, data bits and send it in byte chunks. The packet is going to be fixed length to reduce the packet size. I am not very sure would I need preambles and a stop bit as that would increase the data size, and the start bits and fixed length would determine the start and end of the data transmission.