Article,
Uncoordinated and Decentralized Processing in Extra-Large MIMO Arrays
Affiliations
- [1] Aalborg Univ, Dept Elect Syst, DK-9220 Aalborg, Denmark [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD]
Abstract
We propose a decentralized receiver for extra-large multiple-input multiple-output (XL-MIMO) arrays. Our method operates with no central processing unit (CPU) and all the signal detection tasks are done in distributed nodes. We exploit a combined message-passing framework to design an uncoordinated detection scheme that overcomes three major challenges in the XL-MIMO systems: computational complexity, scalability and non-stationarities in user energy distribution. Our numerical evaluations show a significant performance improvement compared to benchmark distributed methods while operating very close to the centralized receivers.
Keywords
Array signal processing,
Central Processing Unit,
MIMO communication,
Massive MIMO,
Probability density function,
Random variables,
Receivers,
Scalability,
XL-MIMO,
decentralized receivers,
message-passing