Title
Grant-Free NOMA with Device Activity Learning Using Long Short-Term Memory
Abstract
Non-orthogonal multiple access (NOMA) is a promising technique for future cellular networks. A major challenge in the uplink of grant-free NOMA is to identify all active devices as well as to decode their data. In the Internet of Things (IoT), the on-off activities of devices are predictable to various degrees. In this letter, a deep learning algorithm is employed to predict the device activities in the current slot by exploiting the history data. The prediction results are applied as input priors to a modified orthogonal matching pursuit (OMP) algorithm for joint device identification and data detection. Numerical simulation results demonstrate that the error rate is reduced to at least ten times as compared with conventional compressed sensing based algorithms at the same signal-to-noise ratio.
Year
DOI
Venue
2020
10.1109/LWC.2020.2976992
IEEE Wireless Communications Letters
Keywords
DocType
Volume
Prediction algorithms,Matching pursuit algorithms,NOMA,Multiuser detection,Uplink,Base stations,Internet of Things
Journal
9
Issue
ISSN
Citations 
7
2162-2337
0
PageRank 
References 
Authors
0.34
0
3
Name
Order
Citations
PageRank
Xiaqing Miao101.35
Dongning Guo22150137.56
X. Li3498.78