Method of generating and receiving packets in low energy critical infrastructure monitoring system

摘要

A method of generating a packet for low energy critical infrastructure monitoring (LECIM) wireless communication is provided. The method includes steps of generating a first bit string by multiplexing a physical layer header (PHR) bit and a physical layer service data unit (PSDU) bit; convolution encoding the first bit string; interleaving the convolution-encoded first bit string; generating a second bit string by multiplexing the interleaved first bit string with a synchronization header (SHR) bit; and modulating the second bit string with a frequency shift keying (FSK) method and a position-based FSK method.

主权项

1. A method of modulation, the method comprising:
mapping each bit of a bit string to at least four symbols; allocating a modulation frequency to each of the symbols; allocating a position to be transmitted in a duration of each of the symbols; and modulating each of the symbols based on the modulation frequency and the position, wherein the allocating comprises dividing the duration of the symbol into a plurality of positions and selecting a position at which the allocated modulation frequency is to be transmitted and a position at which the allocated modulation frequency is not to be transmitted.