This book investigates the multiuser communication and its key technology-multiple access
technology as well as transceiving design methods. Multiple access methods toward B5G and 6G
currently allows the superposition transmissions of multiuser signals with controllable mutual
interference. By deploying advanced multiuser detector current technology significantly
enhances the connectivity improves the spectral efficiency and simplifies the signaling
interactions. Considering that the major challenge of current multiple access technology is the
design of transceiver due to the overlapped and distorted signals from multiple users we
analyze the promising candidate multiple access schemes and then develop some sights on how to
formulate the transmit signals and how to achieve efficient symbol recovery. Specifically the
incorporation of constellation rotation rate splitting and deep learning techniques in
enhancing the transmission efficiency of multiple access technology are considered.
