Structure family of Grassmannian constellations for MIMO noncoherent communications.

This work presents a practical implementation that integrates three emerging wireless technologies: millimeter-wave (mmWave) communications, non-orthogonal multiple access (NOMA), and intelligent reflective surfaces (IRS). The goal is to provide multi-user mmWave indoor coverage in an indoor setting. Coverage in the mmWave band, often affected by blind spots, is extended by the ad-hoc design and deployment of a fully passive IRS that requires no power supply. Contrary to the use of a reconfigurable intelligent surface (RIS), this solution lacks the dynamic reconfigurability of the relay but offers a low-cost, easy-to-deploy alternative with zero power consumption. The integration with power-domain NOMA provides increased spectral efficiency by multiplexing two users in the same frequency, time and code slot. To the best of our knowledge, this is the first mmWave NOMA implementation and the first prototype that includes both NOMA and IRS. The radio frequency (RF) design ensures a bandwidth of 400 MHz centered at 24.45 GHz, with the IRS covering an angular synthesized margin of 10 degrees when illuminated by a half-power beamwidth of less than 3 degrees. The communication link is evaluated through over-the-air (OTA) measurements of channel power, error vector magnitude (EVM) and symbol error rate (SER), considering different user positions and superposition coding strategies. The system achieves a spectral efficiency of up to 4.62 bps/Hz while serving two users per frequency subchannel with a SER below 10-3.

Operation and management of telecommunication networks are increasingly difficult with the demands and behaviors of users exceeding the capacity of network engineers to keep pace. This has led to increased automation of the network, enabled by various forms of intelligent software. One such proposal from the ITU-T Focus Group on Autonomous Networks (standardization group) is an architecture to achieve self-driven automation (i.e. autonomy) of network operation, whereby technology from different operators and third parties is self-assembled and deployed in production networks. This raises questions and challenges regarding transparency, auditability, and trust while maintaining interoperability.This work presents an initial study of a distributed and decentralized marketplace to bring transparent and auditable trust to the proposed architecture without sacrificing interoperable functionality. We demonstrated this by our proof of concept implementation of both the proposed architecture and marketplace based on the combination of Ethereum and IPFS.