In this paper, symbol error probabilities of orthogonal frequency division multiplexing (OFDM) with 3-Dimensional (3-D) signal constellations over additive white Gaussian noise is computed and analyzed. We present the exact closed-form expressions of the symbol error probabilities of the OFDM system with 3-D 8-ary and 32-ary constellations. In the case of… (More)