Transceiver Design for 6G Compatible CP-less Multi-User Orthogonal Chirp Division Multiplexing System with Physical Layer Security

The strength of the attenuated received signal and the 3D path loss in mmWave transmission are shown. To enhance spectral efficiency and transmission latency a CP-less OCDM system and to reduce both out-of-band (OOB) spectrum power and consumption of additional resources due to cyclic prefixing a proper subcarrier mapping is proposed.

For achieving negligible BER and increased channel capacity a QR decomposition and Gram Schmidt orthogonalization (QR-GSO)-based multi-user, multiple-input, multiple-output (MU-MIMO) precoding system is also proposed in this paper.