Massive MIMO, i.e., equipping cellular base stations with a large number of antennas compared to the number of active users, is a promising technology for next-generation wireless systems. Low-precision hardware components will need to be used in massive MIMO base stations, to scale up the number of antenna arrays while keeping cost low. However, low-precision components may introduce significant hardware impairments, which may reduce considerably the performance of massive MIMO systems. The goal of this research project is to characterize the tradeoff between performance and hardware cost in massive MIMO systems. The focus will be on the hardware impairments resulting from low-resolution analog-to-digital and digital-to-analog converters. The main objectives of this project are i) to characterize the maximum uplink and downlink throughput achievable in a massive MIMO system in the presence of low-resolution converters; ii) to develop low-complexing signaling schemes and receiver algorithms approaching these throughput limits; iii) to provide recommendations on the converter resolution required to reap massive MIMO gains. The project has the additional objectives of strengthening the collaboration between Chalmers and Ericsson within an area (design of next-generation wireless cellular networks) that is important for the Swedish industry, of producing scientific publications and patents, and of enabling knowledge transfer between Chalmers and Ericsson.
Docent at Signals and Systems, Communication Systems
Forskare at Signals and Systems, Signal Processing
Funding years 2015–2020