Impact of Channel Estimation on The Performance of OFDM-IM With Barrage Jamming

Orthogonal frequency division multiplexing (OFDM) with index modulation (OFDM-IM), which transmits information bits both by M-ary constellation symbols and indices of active subcarriers that are selected according to input bits, has attracted the attention of researchers in the recent years. OFDM-IM is a promising candidate for future wireless communication systems, due to its performance gain over OFDM. In this paper, the effect of least square and linear minimum mean squared error (LMMSE) channel estimation algorithms on the performance of OFDM-IM are investigated in the presence of barrage jamming. LMMSE algorithm's robustness against pilot jamming attacks is shown via computer simulations.