Comparative Study and Packet Error Rate Analysis of Advance Modulation Schemes for Optical Wireless Communication Networks

The selection of modulation schemes is an essential stage for every communication network. In optical wireless communication, the analysis of modulation schemes is needed to improve the transmitters and receivers to reinforce the received signal energy. In this work, comparative investigation of key attributes of various modulation schemes used in optical communication systems. Conventional schemes, including on off keying and pulse position modulation, are used as reference to analyze the advanced modulation schemes such as digital pulse interval modulation (DPIM)/dual header pulse interval modulation (DH-PIM) in terms of some benchmark parameters such as transmission power, bandwidth requirement, capacity of system, symbol length, packet correction rate and frequency of transmissions and retransmissions. DH-PIM shows the potential benefit of reduced transmission power, minimum bandwidth and shortest possible symbol length while DPIM offers quick transmission rates with least error rates. The overall complexity involved in modulation schemes is also found to be dependent of network types which are being implemented. In this work, recommendations are made based upon the types of network and capacity of information.