Nanyang Technological University, Singapore
It is my honor to be the editor-in-chief of IJEETC. The journal publishes good papers which focous on the advanced researches in the field of electrical and electronic engineering & telecommunications.
Abstract—Digital modulations provide data to be sent by the optical link. In addition, digital modulation acts like an encoder. Digital modulations encrypt the data and are useful for unsecured channels and in applications where security is very important to us (such as military applications). This paper presents the Multilevel Dual Header-Pulse Interval Modulation (MDH-PIM) scheme for optical wireless communications. MDH-PIM is an isochronous scheme and uses this capability to synchronize the modulated frames. Theoretical and simulation results indicate the better transmission rate of data, bandwidth requirement and transmission power of the MDH-PIM modulation than the Dual Header Pulse Interval Modulation (DH-PIM) and Digital Pulse Interval Modulation (DPIM) schemes. Error rate analysis shows that MDH-PIM offers better packet error rate performance than On-Off Keying (OOK) dose, but it is marginally inferior as compared with DH-PIM.
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