On the Performance of Cache-Free/Cache-Aided STBC-NOMA in Cognitive Hybrid Satellite-Terrestrial Networks

Future wireless networks pose several challenges such as high spectral efficiency, wide coverage, massive connectivity, low receiver complexity, etc. To this end, this letter investigates an overlay-based cognitive hybrid satellite-terrestrial network (CHSTN) combining non-orthogonal multiple access...

Full description

Saved in:
Bibliographic Details
Published in:IEEE wireless communications letters 2022, Vol.11 (12), p.1-1
Main Authors: Singh, Vibhum, Solanki, Sourabh, Eappen, Geoffrey, Palisetty, Rakesh, Vu, Thang X., Merlano-Duncan, Juan Carlos, Chatzinotas, Symeon, Ottersten, Bjorn
Format: Article
Language:English
Subjects:
Block codes
Caching
Fading channels
hybrid satellite-terrestrial networks
Interference cancellation
Network latency
NOMA
non-orthogonal multiple access
Nonorthogonal multiple access
overlay cognitive radio
Relays
Satellite broadcasting
Satellite networks
Satellites
Signal to noise ratio
space-time block coding
Wireless networks
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Future wireless networks pose several challenges such as high spectral efficiency, wide coverage, massive connectivity, low receiver complexity, etc. To this end, this letter investigates an overlay-based cognitive hybrid satellite-terrestrial network (CHSTN) combining non-orthogonal multiple access (NOMA) and conventional Alamouti space-time block coding (STBC) techniques. Herein, a decode-and-forward based secondary terrestrial network cooperates with a primary satellite network for dynamic spectrum access. Further, for reliable content delivery and low latency requirements, wireless caching is employed, whereby the secondary network can store the most popular contents of the primary network. Considering the relevant heterogeneous fading channel models and the NOMA-based imperfect successive interference cancellation, we examine the performance of CHSTN for the cache-free (CF) STBC-NOMA and the cache-aided (CA) STBC-NOMA schemes. We assess the outage probability expressions for primary and secondary networks and further, highlight the corresponding achievable diversity orders. Indicatively, the proposed CF/CA STBC-NOMA schemes for CHSTN perform significantly better than the benchmark standalone NOMA and OMA schemes.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2022.3213367