Fully Non-Orthogonal Communication for Massive Access

To achieve spectral-efficient massive access in future wireless networks, this paper proposes a comprehensive fully non-orthogonal communication framework. First, we design a fully non-orthogonal communication scheme which consists of non-orthogonal channel estimation and non-orthogonal multiple acc...

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Bibliographic Details
Published in:IEEE transactions on communications 2018-04, Vol.66 (4), p.1717-1731
Main Authors: Xiaoming Chen, Zhaoyang Zhang, Caijun Zhong, Rundong Jia, Ng, Derrick Wing Kwan
Format: Article
Language:English
Subjects:
Array signal processing
Channel estimation
Communication channels
Computer simulation
Efficiency
Interference
large-scale antenna array
Lower bounds
massive access
MIMO
Mobile communication
NOMA
Non-orthogonal communication
Optimization
Silicon carbide
Spectra
Wireless communications
Wireless networks
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Summary:To achieve spectral-efficient massive access in future wireless networks, this paper proposes a comprehensive fully non-orthogonal communication framework. First, we design a fully non-orthogonal communication scheme which consists of non-orthogonal channel estimation and non-orthogonal multiple access. Then, we analyze the performance of the proposed fully non-orthogonal communication, and derive a tight lower bound on the spectral efficiency in terms of key system parameters and channel conditions. Meanwhile, several novel insights are provided on spectral efficiency via asymptotic analysis in three important cases, i.e., a large number of base station (BS) antennas, a high BS transmit power, and perfect channel state information (CSI) at the BS. Finally, we optimize the performance of the proposed fully non-orthogonal communication and present two simple but efficient optimization algorithms for maximizing the weighted sum of spectral efficiency. Extensive simulation results validate the effectiveness of the proposed schemes.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2017.2779150