Fig. 1. Schematic diagram of PCMA transmission system

Fig. 2. PCMA reception scheme in fading scenario

Fig. 3. Schematic diagram of channel estimation scheme

Fig. 4. Comparison of NMSE of training sequence-based channel estimation

Fig. 5. Comparison of channel prediction NMSE of AR model at different elevation angles

Fig. 6. Comparison of BER of PCMA receiving schemes