In this paper, we apply polar codes to a modified version of OFDM systems with index modulation which is called in-phase/quadrature (OFDM-I/Q-IM). We provide general design guidelines for the proposed polar-coded OFDM-I/Q-IM systems. system, at transmitter, employ random frozen bits appending scheme not only makes code compatible but also improves bit error rate (BER) performance system. Furthe...