Taufiqurrahman, M. A., Astawa, I. G. P. and Sudarsono, A. (2016) “Performance Analysis of Circular 8-QAM Constellation with MMSE Equalizer for OFDM System Using USRP”, EMITTER International Journal of Engineering Technology, 4(2), pp. 259-276. doi: 10.24003/emitter.v4i2.148.