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Modulation Order Replacement for OFDM with Index Modulation

August 16, 2019 @ 4:00 pm - 5:00 pm

DATE              :           16th August 2019

TIME               :           4 pm – 5pm

VENUE           :           ESB 244

SPEAKER        :           Abhijith Nambi S (EE15D207)

GUIDE            :           Dr. K. Giridhar




OFDM with index modulation (OFDM-IM)  is an emerging communication technique where the manner in which a group of sub-carriers is chosen from a pool of the same conveys information, apart from the  data symbols carried.  For the same number of information bits conveyed, OFDM-IM is shown to have lower bit error rate (BER) when compared to conventional OFDM. There are a wide range of research proposals for this technique, which focus on different aspects like BER, spectral efficiency,  PAPR, etc. Due to the inherent existence of inactive (silent) sub-carriers, to attain a higher spectral efficiency, conventional OFDM -IM requires higher order modulation, which can degrade its BER performance. In this seminar, a method to lower the modulation order so as  to reduces the BER in OFDM-IM is described.  The lowering is introduced without imposing any compromise on spectral efficiency. This lower order modulation aided  approach can also be extended to the variants of OFDM-IM such as dual-mode OFDM-IM and in-phase\quadrature OFDM-IM. The performance improvement for OFDM-IM and its variants is quantified by theoretical and numerical results which reveal gains up to 4dB.



August 16, 2019
4:00 pm - 5:00 pm
Event Category:


ESB – 244
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