Probabilistic ODMA Receiver With Low-Complexity Algorithm for MIMO Unsourced Random Access

In this work, we present the design for both pilot-uncoupled and pilot-free on-off multiple access (ODMA) receivers in unsourced random access (URA) for multiple-input multiple-output (MIMO) systems. Unlike pilot-coupled ODMA, where on-off patterns are linked to pilot selection, pilot-uncoupled and...

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Vydané v:IEEE transactions on vehicular technology Ročník 74; číslo 10; s. 16556 - 16561
Hlavní autori: Zhang, Zhentian, Dang, Jian, Zhang, Zaichen
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.10.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Algorithms
approximate message passing (AMP) detector
Complexity
Complexity theory
Decoding
Detectors
Encoding
joint pattern and data detection
Matrix decomposition
Message passing
MIMO
Modulation
On off patterns
Pilot selection
pilot-free and pilot-uncoupled on-off multiple access (ODMA)
Probabilistic logic
Random access
Receivers
Statistical analysis
Unsourced random access (URA)
Vectors
ISSN:0018-9545, 1939-9359
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Popis
Shrnutí:In this work, we present the design for both pilot-uncoupled and pilot-free on-off multiple access (ODMA) receivers in unsourced random access (URA) for multiple-input multiple-output (MIMO) systems. Unlike pilot-coupled ODMA, where on-off patterns are linked to pilot selection, pilot-uncoupled and pilot-free ODMA reduce transmission redundancy but face challenges in processing complexity and capacity performance. The joint pattern and data detector (JPDD) design is critical for these schemes, but the current JPDD algorithm has high complexity with quadratic computational costs. To address this, we propose a low-complexity detector based on approximate message passing (AMP), which offers linear complexity, providing reduced cost and improved performance in the under-determined linear regression case. Decoding is initialized via pilot-free matrix factorization through alternating minimization, resolving phase and scalar ambiguities. Compared to existing pilot-free schemes, the proposed method achieves a 13 dB improvement and favorable trade-offs in complexity and capacity performance when compared to benchmarks.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 14
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2025.3570708