Performance Analysis of NOMA and OMA in Terms of Throughput and User Capacity | Chapter 9 | Exploration of Knowledge and Information in Sciences

Throughput, ergodic capacity, successive interference cancellation (SIC), NOMA, OMAAn increasing number of wireless devices in the present day putting a challenge of high spectral efficiency. The sixth generation (6G) is implemented to address this problem. But conventional orthogonal multiple access (OMA) approach is insufficient for the increased demand for spectrum. Non-orthogonal multiple access, or NOMA has drawn more and more interest in recent years from both academia and business and future 6G networks may find the NOMA technique to be advantageous as it offers spectrum efficiency, user fairness, better connectivity, and increased data rate, as compared to previous orthogonal multiple access approaches. Consequently, NOMA may be an appropriate multiple-access method due to its capacity to offer free random access and a further degree of flexibility for ultra-reliable low-latency communications (URLLC). This paper reviews the fundamentals of NOMA and related recent research on how beneficial it is in cooperative networks for improving performance analysis. The benefits of non-orthogonal multiple access (NOMA) have been well acknowledged in order to maximize the spectral efficiency. NOMA attracts many researchers as it solves the frequency deficiency problem by transmitting data at the same frequency and time. In NOMA data is transmitted in the power domain using Superposition coding at the transmitter side and successive interference cancellation at the receiver side. In this paper, we analyse the performance of NOMA in terms of received data rate (throughput) and ergodic capacity with the conventional OMA scheme.

 

Author (s) Details

 

Nidhi Chaudhary
ECE Department, NIT, Kurukshetra, 136119, India.

 

N. P. Singh
ECE Department, NIT, Kurukshetra, 136119, India.

 

Gaurav Verma
ECE Department, NIT, Kurukshetra, 136119, India.

 

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Multiuser Detection Using NOMA Technique for FDMC-CDMA System in Fading Channels: An Overview | Chapter 1 | Emerging Trends in Engineering Research and Technology Vol. 3

Non-Orthogonal Multiple Access (NOMA) is an emerging technique which will perform well in 5G wireless communication system. Multiple users can share the resources which are available in spectrum and also individual user can be identified easily with the help of Successive Interference Cancelation (SIC) algorithm. In this paper, the power domain is considered for detection of power allocation for the base stations. The errors in fading channel is demonstrated with the help of multi carrier code division multiple access (MC-CDMA), in which the frequency diversity can be resolved hastily. Due to high range of multiple access interferences the performance of MC-CDMA has been restricted. A new technique is proposed in this paper, based on Frequency Division - Multi Carrier Code Division Multiple Access (FD-MC-CDMA) system and the Multiple Access Interference (MAI) can be greatly reduced by exploiting the available range of frequencies.  NOMA principle is used to enhance the signal strength of proposed system and highly restricted for appearance of MAI at the receiver end. In this paper, the NOMA based FD-MC-CDMA system; the range of signal strength can increase for different users in fading channels and reduce the interferences between the users. The performance of the proposed system can be estimated in terms of Bit error rate (BER) and SNR and   it compares with other existing techniques. The simulation results are carried out using Matlab software. 

Author(s) Details

Dr. Guntu Nooka Raju
GMR Institute of Technology, Rajam, Srikakulam, A.P., India.

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