Channel Capacity for a Model of Packet Level Index Modulation in LPWA Networks

Packet level index modulation is a modulation scheme that can expand the transmission capacity without changing the existing LPWA (Low Power Wide Area) communication standard. In this paper, we calculate the theoretical capacity of the channel. In this modulation scheme, time is treated as a unit of slots and there are multiple channels that can transmit packets. To comply with the 10 % duty cycle of LPWA specification, we assume that only 1 packet is transmitted per 10 slot. In general, it is possible to transmit $N$ packets in 10N slots. We calculate the capacity of the channel for this model.