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I am trying to understand the difference(s) between V-OFDM (Vector Orthogonal Frequency Division Multiplexing) and OSDM (Orthogonal Signal Division Multiplexing) which are used as a multicarrier modulation techniques in wireless communication. Based on what I understand both are dividing the sub-carriers into groups of sub-carriers vertically, and then process the $DFT$ horizontally. But when checking online and read different papers and books, some are talking about V-OFDM and others OSDM !!

Could anyone please explain further about differences between them ? design and differences of OSDM from V-OFDM? Or they are similar, only two different names with same technology !!!

Thanks in Advance!

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They are little bit different in performing the $DFT$ and the adding of $CP$. her you can read more details about those differences : https://sci-hub.tw/10.1109/ICC.2009.5198846

Good luck

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