Channel Charting Aided Pilot Allocation in Multi-Cell Massive MIMO mMTC Networks

Lucas Ribeiro, Markus Leinonen, Isuru Rathnayaka, Hanan Al-Tous, Markku Juntti

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

3 Sitaatiot (Scopus)
76 Lataukset (Pure)

Abstrakti

Serving a plethora of devices in massive machinetype communications (mMTC) can rely on spatial multiplexing enabled by massive multiple-input multiple-output (mMIMO) technology. To release the full potential, accurate channel estimation is needed. Due to the large numbers of devices it necessitates pilot reuse. We propose a pilot allocation algorithm based on multi-point channel charting (CC) to mitigate inevitable pilot contamination in a multi-cell multi-sector mMTC network with spatially correlated mMIMO channels. The generated CC represents an effective interference map from channel covariance matrices to capture the degree of pilot contamination caused by sharing the same pilot sequence among multiple users. The map is then fed into a greedy algorithm that aims at optimizing the reuse pattern of orthogonal pilot sequences to minimize the performance degradation caused by pilot contamination. The proposed CC-based method is empirically shown to obtain notable gains over a reuse-factor-aware random pilot allocation, yet leaving room for further improvements.

AlkuperäiskieliEnglanti
Otsikko2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication, SPAWC 2022
KustantajaIEEE
Sivumäärä5
ISBN (elektroninen)978-1-6654-9455-7
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaIEEE International Workshop on Signal Processing Advances in Wireless Communication - Oulu, Suomi
Kesto: 4 heinäk. 20226 heinäk. 2022

Julkaisusarja

NimiIEEE International Workshop on Signal Processing Advances in Wireless Communications
ISSN (painettu)2325-3789

Conference

ConferenceIEEE International Workshop on Signal Processing Advances in Wireless Communication
LyhennettäSPAWC
Maa/AlueSuomi
KaupunkiOulu
Ajanjakso04/07/202206/07/2022

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