Abstract
In this chapter, we will present proof of concept and validation through system implementation technology based on a cloud baseband processing architecture. This system has the following features: a cell-free system architecture, 5G NR-based time division duplex (TDD) wideband orthogonal frequency-division multiplexing (OFDM) wireless transmission, support for multiuser D-MIMO, a system bandwidth and frequency point of 100 MHz@3.5 GHz, and a spectrum utilization rate up to 100 bit/(S⋅⋅HE).