Mahmood, N., M. K. Shahid, and A. Saeed. “A Comparative Analysis of OFDM Based Communication Using Different Mapping Schemes for Signal Modulation”. INTERNATIONAL JOURNAL OF COMPUTERS &Amp; TECHNOLOGY, vol. 12, no. 10, Mar. 2014, pp. 3952-61, doi:10.24297/ijct.v12i10.2982.