Unsourced Random Access with a Massive MIMO Receiver Using Multiple Stages of Orthogonal Pilots

Publikation: Beitrag in Buch/Konferenzbericht/Sammelband/GutachtenBeitrag in KonferenzbandBeigetragenBegutachtung



We study the problem of unsourced random access (URA) over Rayleigh block-fading channels with a receiver equipped with multiple antennas. We employ multiple stages of orthogonal pilots, each of which is randomly picked from a codebook. In the proposed scheme, each user encodes its message using a polar code and appends it to the selected pilot sequences to construct its transmitted signal. Accordingly, the received signal consists of superposition of the users’ signals each composed of multiple orthogonal pilot parts and a polar coded part. We use an iterative approach for decoding the transmitted messages along with a suitable successive interference cancellation scheme. Performance of the proposed scheme is illustrated via extensive set of simulation results which show that it significantly outperforms the existing approaches for URA over multiple-input multiple-output fading channels.


Titel2022 IEEE International Symposium on Information Theory (ISIT)
Herausgeber (Verlag)IEEE
ISBN (Print)978-1-6654-2160-7
PublikationsstatusVeröffentlicht - 1 Juli 2022
Extern publiziertJa


Titel2022 IEEE International Symposium on Information Theory (ISIT)
Dauer26 Juni - 1 Juli 2022
OrtEspoo, Finland

Externe IDs

Scopus 85136284484



  • Fading channels, Interference cancellation, Simulation, Receivers, Massive MIMO, Probability, MIMO