iosr-JECE   Volume-20 ~ Issue-4 ~ Jul. - Aug. 2025

Abstract: The knowledge of the variability of a received signal at distant points to the Base Station (BS) is key for reliable and efficient radio signal transmissions. In consequence, developing a robust Path Loss Model (PLM) for determining the Path Loss (PL) between a High Altitude Platform Station (HAPS) and the User Equipment (UE) on the ground is crucial in positioning the HAPS. This paper presents a HAPS PLM for Ede environment. The PLM was developed based on some demographic data of the Ede land area. The parameters employed in the development of the PLM......

Keywords: High Altitude Platform Station (HAPS), Path Loss (PL), LOS, NLOS, radio propagation environment

[1]. Kurt GK, Khoshkholgh MG, Alfattani S, Ibrahim A, Darwish TSJ, Alam MS, Yanikomeroglu H, Yongacoglu A. A Vision And Framework For The High Altitude Platform Station (HAPS) Networks Of The Future. IEEE Communications Surveys & Tutorials. 2021; 23(2):729–779.
[2]. Zhao J, Zou J, Li Z, Ding L, Liu S, Liao Y. High Altitude Platform Communication System Based On Satellite Communication Theory. In 2022 IEEE 22nd International Conference On Communication Technology (ICCT). 2022: 446–450.
[3]. Vázquez-Castro M, Pérez-Fontán F, Arbesser-Rastburg B. Channel Modeling For Satellite And HAPS System Design. Wireless Commun. Mobile Comput. 2002; 2(3):285–300.
[4]. Dong S, Tang Z, Ma H. A Review Of Routing Protocols For FANET. IOSR Journal Of Electronics And Communication Engineering (IOSR-JECE). 2024; 19(6), Ser. 1:6-22.
[5]. Kumari M, Mishra SK. Realization Of 4×200 Gbps 4-QAM OFDM-OWC System Using Higher Order OAM Modes For HAP-To-Satellites Scenario. Photonics. 2024; 11(294):1-16..

Abstract: The continuous growth in Device-to-Device (D2D) and Machine-to-Machine (M2M) communications demands for a robust uplink Radio Resource Management (RRM) strategy. However, radio waves in a mobile cellular radio access network such as the Long Term Evolution (LTE) network are faced with the problem of Intercell Interference (ICI) which limits the achievable system throughput. Thus, this paper proposes a Quality-of-Service (QoS)-based ICI mitigation (QICIM) scheme for the LTE network uplink. The proposed QICIM scheme involves coordination among the cells that make up the network to achieve maximum system throughput via QoS priority and effective power control for interference mitigation among the User Equipment (UEs).......

Keywords: Intercell Interference (ICI), Long Term Evolution (LTE), Physical Resource Block (PRB), Quality-of-Service (QoS), Radio Resource Management (RRM).

[1]. Emran M, Thayananthan V, Umair M, Kotuliak I, Qureshi MS, Qureshi MB. The Handover And Performance Analysis Of LTE Network With Traditional And SDN Approaches. Wireless Communications And Mobile Computing. 2022; Volume 2022:1-9.
[2]. Routray SK, Mohanty S. Cellular Internet Of Things: Principles, Potentials And Use Cases. EAI Endorsed Transactions On Internet Of Things. 2024; 10:1-14.
[3]. Sesia S, Toufik I, Baker M. LTE – The UMTS Long Term Evolution - From Theory To Practice, 2nd Ed, John Wiley & Sons Ltd, UK. 2011.
[4]. Deb S, Monogioudis P. Learning-Based Uplink Interference Management In 4G LTE Cellular Systems. IEEE/ACM Transactions On Networking. 2015; 23(2):398-411.
[5]. Ajayi OO, Badrudeen AA, Abolade RO, Adeyemo ZK. A Bandwidth-Efficient Carrier Frequency Synchronization Technique With Improved Accuracy For LTE Communication Systems. Proceedings Of The 1st International Conference On Electrical, Electronic, Computer Engineering & Allied Multidisciplinary Fields (1st ICEECE & AMF), Ibadan, Nigeria. 2021; 1(1):10-16.

Abstract: The segment of much arranged exploration and bits of knowledge is an investigation to find a talented imaging de-commotion techniques in spite of everything. Investigate the results of various strategies for picture de-noising plan. On the perception of results correlation choose proposed work. The proposed work center around luminance and chrominance highlight change. Picture highlight assess through Compacted Histogram of Inclination include change method. In light of overview, we propose a surface part change and novel setback planning that encourages the relationship to restore whine free pictures by focusing on the clear visual quality.

Keywords: Image De-noising, Noise, Compressed Histogram of Gradient, Luminance, Chrominance.

[1] Zhaoming Kong And Xiaowei Yang (2019), “Color Image And Multispectral Image Denoising Using Block Diagonal Representation”, IEEE Transactions On Image Processing.
[2] Shuhang Gu, Radu Timofte (2019), “A Brief Review Of Image Denoising Algorithms And Beyond”, Computer Vision Laboratory, ETH Zürich, Switzerland.
[3] A. Buades, B. Coll, And J. M. Morel (2018), “A Review Of Image Denoising Algorithms, With A New One”, Society For Industrial And Applied Mathematics, Volume 4, Issue 2.
[4] Yan Jin, Wenyu Jiang, Jianlong Shao And Jin Lu (2018), “An Improved Image Denoising Model Based On Nonlocal Means Filter”, Hindawi Mathematical Problems In Engineering Volume.
[5] Jiahao Pang And Gene Cheung (2017), “Graph Laplacian Regularization For Image De-Noising: Analysis In The Continuous Domain”, IEEE Transactions On Image Processing.

Abstract: This paper presents a comprehensive investigation of two strategically significant domains in modern photonics and optical communication systems: (i) the development and characterization of Er³⁺-Yb³⁺ codoped bismuth-tellurite glasses for efficient frequency up conversion, and (ii) the performance enhancement of erbium-doped fiber amplifiers (EDFAs) through an intelligent Adaptive Multi-Stage EDFA Optimization (AMEDO) algorithm. By addressing both material-level and system-level challenges, this work contributes to the advancement of next-generation optical technologies. In the first part, Er³⁺-Yb³⁺ codoped bismuth-tellurite glasses.....

Keywords: Bismuth Tellurite Glasses, Er³⁺/Yb³⁺ Co-doping, Optical Up conversion, Rare Earth Ions, Tellurite Glass Matrix, Photonic Materials, Luminescence Properties, Green Emission, Red Emission, Energy Transfer Mechanism, Excited State Absorption (ESA), Up conversion Luminescence, 980 nm Excitation

[1]. Hemlata Kumari, Ghizal F Ansari, SK Mahajan, K Sk Rezaul, Sukhdev Bairagi, "Study of visible upconversion luminescence in Er3+ and Er3+/Yb3+ doped tungsten tellurite glasses" Materials Today: Proceedings 59 (2022) 1127-1131, doi.org/ 10.1016/j.matpr.2022.03.027.
[2]. Ghizal F Ansari, Sachin Kumar Mahajan, J Parashar, "Intense Upconversion Luminescence of Yb3+-Er3+ in Li2O Content Tungsten-tellurite Glasses" J Fluoresc (2011) 21:1337-1342, DOI 10.1007/s10895-011-0864-9
[3]. Agrawal G.P., Fiber optic communication systems, John Wiley & Sons, New York, 1997.
[4]. Giles C.R., Desurvire E., “Modelling Erbium-Doped Fiber Amplifiers”, Journal of Lightwave Technology Letters, Vol. 9, No 2, 271-283, 1991.
[5]. Deservire E., “Erbium doped fiber amplifiers: principles and applications”, John Wiley & Sons, New York, 1994