scholarly journals An Energy-Efficient Spectrum Sensing in Cognitive Radio Network Using Fractional Optimization Model

2021 ◽  
Author(s):  
Praveen Hipparge ◽  
Shivkumar S. Jawaligi
Keyword(s):  
Energy Efficiency ◽  
Wireless Communication ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Spectrum Sensing ◽  
Radio Spectrum ◽  
Energy Utilization ◽  
Transmission Power ◽  
Power Spectral ◽  
Spectrum Holes

Abstract In wireless communication, the main challenge is to use the radio spectrum efficiently. The spectrum used for wireless radio technology is a natural resource that is limited and expensive. The tremendous growth of the market for wireless communication has led to radio spectrum scarcity. The process for conventional spectrum sensing initiates by scanning the frequency spectra for finding the spectrum holes. On the basis of the availability of spectrum holes, Secondary User (SU) can transmit data and need to perform periodic sensing for a seamless connection. In this work, to detect spectrum holes with improved energy utilization, we have proposed the Fractional Optimization Model (FOM) which is the combination of Gray wolf optimization and Cuckoo search algorithm to detect the spectrum holes with improved energy utilization. In this paper, the model is made to obtain energy efficiency while considering different spectrum sensing states. The energy efficiency is improved by optimizing the parameters such as transmission power, sensing bandwidth, and power spectral density using the Fractional GWO-CS optimization algorithm. With the proposed novel FOM, the spectrum holes can be detected with the optimized transmission power, sensing bandwidth, and power spectral density values. The proposed model will be implemented in the working platform of Matlab by optimizing the energy efficiency of spectrum sensing in terms of transmission power, spectrum sensing bandwidth, and power spectral density compared which will be compared with existing optimization methods.

scholarly journals Spectrum sensing based on cumulative power spectral density

2017 ◽  
Vol 2017 (1) ◽  
Author(s):  
A. Nasser ◽  
A. Mansour ◽  
K. C. Yao ◽  
H. Abdallah ◽  
H. Charara
Keyword(s):  
Spectral Density ◽  
Power Spectral Density ◽  
Spectrum Sensing ◽  
Power Spectral

scholarly journals Theoretical Analysis and Performance Comparison of Multi-carrier Waveforms for 5G Wireless Applications

2021 ◽  
Vol 13 (6) ◽  
Author(s):  
Jamal Mestoui ◽  
◽  
Mohammed El Ghzaoui ◽  
Keyword(s):  
Energy Consumption ◽  
Wireless Communication ◽  
Power Consumption ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Spectral Efficiency ◽  
Efficient Solution ◽  
The Other ◽  
Frequency Division ◽  
Power Spectral

Fifth generation (5G) wireless technology is a new wireless communication system that must meet different complementary needs: the high data rate for mobile services, low energy consumption and long-range for connected objects, low latency to ensure real-time communication for critical applications and, high spectral efficiency to improve the overall system capacity. The waveforms and associated signal processing present a real challenge in the implementation of each generation of wireless communication networks. Different research works have discussed this topic; but, these works are limited to the Filter-Bank Multi-Carrier (FBMC), Universal Filtered Multi-Carrier (UFMC), and Filtered Orthogonal Frequency-Division Multiplexing (F-OFDM) waveforms. In this work, we review the technical basics of the physical layer for the LTE system which uses, OFDM modulation for the downlink and the single carrier frequency division multiple access (SC-FDMA) technique for the uplink. Besides, this paper presents the diverse waveforms candidate for 5G systems, including, FBMC, UFMC, and F-OFDM, and compares these techniques with Constant Envelope-OFDM (CE-OFDM), which is an advantageous form regarding power consumption, especially for battery-powered devices. Simulations are carried out to compare the performance of the OFDM, CE-OFDM, F-OFDM, UFMC, and FBMC in terms of power spectral density (PSD) and Bit Error Rate (BER). It has been demonstrated that (CE-OFDM) constitutes a more efficient solution in terms of energy consumption than the other technics. By comparison with the other technics, the CE-OFDM scheme performances, in terms of BER and PSD, are controllable by the values of its parameters (M, h, and J). This advantage gives designers of the system to consider the mutual choice between spectral efficiency and the BER. Moreover, the (F-OFDM), (UFMC), and (FBMC) schemes could constitute a more efficient solution in terms of power spectral density. It can be concluded from this paper that CE-OFDM wave form gives the best performance in terms of power consumption by reducing the Peak to Average Power Ratio (PAPR) associated with the OFDM system and FBMC is an efficiency technique to reduce the inter-carrier interference (ICI).

Circular Folding Cooperative Power Spectral Density Split Cancellation Algorithm for Spectrum Sensing

2017 ◽  
Vol 21 (2) ◽  
pp. 250-253 ◽  
Author(s):  
Roberto C. D. V. Bomfin ◽  
Rausley A. A. de Souza ◽  
Dayan A. Guimaraes
Keyword(s):  
Spectral Density ◽  
Power Spectral Density ◽  
Spectrum Sensing ◽  
Power Spectral ◽  
Cooperative Power

scholarly journals 5G Multi-Carrier Modulation Techniques: Prototype Filters, Power Spectral Density, and Bit Error Rate Performance

2021 ◽  
Author(s):  
Shaik Nilofer ◽  
Praveen Kumar Malik
Keyword(s):  
Wireless Communication ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Bit Error Rate ◽  
Error Rate ◽  
Orthogonal Frequency Division Multiplexing ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Fifth Generation ◽  
Power Spectral

Abstract In recent years for fourth-generation wireless communication systems Orthogonal Frequency Division Multiplexing (OFDM) multi-carrier modulation (MCM) has been an excellent choice. But for the fifth-generation air interface, the choice of multi-carrier modulation remains the biggest challenge. A potential multi-carrier modulation or candidate waveforms are required for the design of the physical layer. This paper highlights the merits and limitations of new candidate waveforms for fifth-generation wireless communication system. This paper mainly reviews Orthogonal frequency division multiplexing, Filtered-OFDM (F-OFDM), Universal Frequency Division Multiplexing (UFMC), Filtered Bank Multi-Carrier Modulation (FBMC), and Generalized Frequency Division Multiplexing (GFDM). This paper mainly reviews some of the comparisons of the parameters as power spectral density and bit error rate.

Sign in / Sign up

Export Citation Format

Share Document