Cognitive OFDM-NOMA System: A succinct Study

Integration of non-orthogonal and orthogonal multiplexing used to enhance the capacity of the system is presented here. This is also called as cognitive OFDM- NOMA. Here we overcome some problems which are divided into sub problems i.e., the power allocation optimization, user scheduling and sensing...

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Bibliographic Details
Published in:Journal of physics. Conference series 2021-01, Vol.1714 (1), p.12054
Main Authors: Vamsi Krishna, Chavatapalli Tarun, Deepika, Chandana Mani, Saranya, B.S., Neeladri, Murrey
Format: Article
Language:English
Subjects:
capacity maximization
Clustering
Cognitive OFDM
Domains
NOMA
Nonorthogonal multiple access
Optimization
Orthogonal Frequency Division Multiplexing
Physics
power allocation
Wireless communications
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Summary:Integration of non-orthogonal and orthogonal multiplexing used to enhance the capacity of the system is presented here. This is also called as cognitive OFDM- NOMA. Here we overcome some problems which are divided into sub problems i.e., the power allocation optimization, user scheduling and sensing duration, respectively. Orthogonal frequency division multiplexing (OFDM) for multiusers can also be done by clustering based radio allocation (RA) scheme. This will improve maximum usage of wireless communications by optimizing the sum capacity of secondary users. The users in same group have the same OFDM sub channels to enhance spectrum utilization. Mobile networks have used time/frequency/code domain for multiple access, while in NOMA the power domain will be used.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1714/1/012054