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Fundamental limits ...
Fundamental limits of low-density spreading NOMA with fading
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- Le, Mai T.P. (författare)
- Universita degli Studi di Roma la Sapienza,Sapienza University of Rome
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- Ferrante, Guido, 1987 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Massachusetts Institute of Technology (MIT),Singapore University of Technology and Design
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- Quek, Tony Q.S. (författare)
- Singapore University of Technology and Design
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- Di Benedetto, Maria Gabriella (författare)
- Universita degli Studi di Roma la Sapienza,Sapienza University of Rome
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(creator_code:org_t)
- 2018
- 2018
- Engelska.
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Ingår i: IEEE Transactions on Wireless Communications. - 1558-2248 .- 1536-1276. ; 17:7, s. 4648-4659
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Spectral efficiency of low-density spreading non-orthogonal multiple access channels in the presence of fading is derived for linear detection with independent decoding and optimum decoding. The large system limit, where both the number of users and number of signal dimensions grow with fixed ratio, called load, is considered. In the case of optimum decoding, it is found that low-density spreading underperforms dense spreading for all loads. Conversely, linear detection is characterized by different behaviors in the underloaded versus overloaded regimes. In particular, it is shown that spectral efficiency changes smoothly as load increases. However, in the overloaded regime, the spectral efficiency of low-density spreading is higher than that of dense spreading.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Kommunikationssystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Communication Systems (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- multiple access channels
- non-orthogonal multiple access (NOMA)
- Spectral efficiency
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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