Modulation performance in Wireless Avionics Intra Communications (WAIC)

This paper discusses the comparison of 4 (four) types of modulation used in WAIC technology. WAIC (Wireless Avionics Intra Communications) is a new wireless system that connects avionics over short distances in the aircraft. The technology was proposed by ITU (International Telecommunication Union), ICAO (International Civil Aviation Organization), AVSI (Aerospace Vehicle Systems Institute), and aircraft manufacturers. The various kinds of modulation give significant impact to required WAIC spectrum. Subsequently, such factor is also determined by the modulation efficiency that is unique to the type of modulation. This paper investigates the modulation trade-offs that must be fulfilled to gain optimum result. These optimum results are the key findings to determine the spectrum and the number of OPS (Omnidirectional Point Source). The parameters being simulated are power, modulation efficiency, BER, and the total spectrum needed. The result shows that QPSK is the best proposed modulation respected to the most optimum simulation results. In conclusion, QPSK could be used as the modulation system used in WAIC technology.