Dual PHY Layer Multiple Access Transceiver for Next Generation 6G Networks

Orthogonal Chirp Division Multiplexing (OCDM) enhances digital communication by improving robustness against noise and adjacent channel interference, surpassing Orthogonal Frequency Division Multiplexing (OFDM) in spectral efficiency and multi-user capacity. While most 5G networks rely on OFDM with lower computational complexity and latency, this paper proposes a dual physical layer transceiver that integrates both OFDM and OCDM to meet the advanced requirements of 6G networks while ensuring backward compatibility with 5G. The system's performance is assessed based on bit error rate (BER) under channel impairments such as Rayleigh fading and IQ imbalance, and multi-user capacity is evaluated. The analysis demonstrates that OCDM offers significant advantages over OFDM, particularly under challenging channel conditions, making this architecture a promising candidate for future 6G systems.