Anti-Eavesdropping and Anti-Jamming Waveform Design with Coding Split Index Modulation

The development of advanced anti-eavesdropping and anti-jamming techniques is vital for ensuring the security and reliability of future 6G communication systems. Index modulation (IM) has attracted attention due to its enhanced power efficiency achieved by the implicit index domain information, in addition to the explicit data symbol modulation. However, IM is vulnerable to both eavesdropping and jamming attacks due to the non-optimal processing of the index and data domains. This work proposes a coding split IM (CSIM) framework where the index and data domains are separately coded and adjusted. It allows for the use of different coding schemes in each domain, thereby confusing eavesdroppers and preventing them from successful decoding. Moreover, CSIM can adjust coding schemes and ensure that at least one domain information, either the index or data domain, is recoverable when eavesdroppers perform jamming attacks.