Figure 3From: Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systemsProbability density function for SINR for E s / σ2 = 20 dB for our proposed scheme (solid) and 2D OFDM-CDMA (dotted), for both simulated and calculated ( N t , N r = 4, N c = 16, and M = 16).Back to article page