iosr-JVSP   Volume-15 ~ Issue-4 ~ Jul. - Aug. 2025

ABSTRACT: The need for high capacity long haul telecommunication system to carry huge traffic demands in recent times has lead to the use of optic fiber communication system because of its high capacity carrying advantage over wireless systems. But optic fiber signals suffer some signal impairment issues such as nonlinearity which tends to degrade its transmission performance. This paper proposed the use of adaptive optical equalizer to mitigate such impairments......

Key Word: Nonlinear optic fiber, self-phase modulation, Kerr effect, refractive index, nonlinearity mitigation

[1]. Paul E. and Green, Jr, 2003 “ Fiber Optic Networks”, Prince Hall, Englewood Cliffs, New Jersey,
[2]. Agrawal, G. P.,2001, “Nonlinear Fiber Optics”, 3rd edition, Academic Press, San Diego, CA, 2001.
[3]. Poggiolini, P.; Jiang, Y. “Recent Advances in the Modeling of the Impact of Nonlinear Fiber Propagation Effects on Uncompensated Coherent Transmission Systems”. J. Lightw. Technol. 2017, 35, 458–480. [CrossRef]
[4]. Golani, O.; Feder, M.; Shtaif, M. Kalman, “MLSE equalization of nonlinear noise”. In Proceedings of the 2017 Optical Fiber Communications Conference and Exhibition (OFC), Los Angeles, CA, USA, 19–23 March 2017; Optical Society of America: Washington, DC, USA, 2017.
[5]. Golani, O.; Elson, D.; Lavery, D.; Galdino, L.; Killey, R.; Bayvel, P.; Shtaif, M. “Experimental characterization of nonlinear interference noise as a process of intersymbol Interference”. Opt. Lett. 2018, 43, 1123–1126

ABSTRACT: The floor-plan design is one of the important problem and this problem can be modeled as a combinatorial optimization problem.Today,VLSI technology has taken a fundamental role in developing most of the high-tech electronic circuits. Even though VLSI design is renowned for its smaller size, lower cost, lower power, high reliability....

[1]. Probir K. Bondyopadhyay, “Moore’s Law Governs the Silicon Revolution,” in Proceedings of the IEEE, vol. 86, pp 1, Jan 1998.
[2]. Data from http://www.iwailab.ep.titech.ac.jp/pdf/201403dthesis/wu.pdf.
[3]. Data from http://www.silvaco.com/examples/tcad/section46/index.html.
[4]. K. Kim and J. Fossum, “Double-Gate CMOS: Symmetrical- Versus Asymmetrical-Gate Devices,” IEEE Trans. Electron Devices,
vol. 48, no. 2, pp. 294–299, Feb. 2001.

ABSTRACT: This paper presents design of a Double Gate (DG) heterostructure based tunnelling FET with Subthreshold less than 60 mV/decade. The designed DG-FET has attained the sub-threshold slope (SS) of 51.5 mV/decade and provides on-current of 1.93 nA/μm2 for Si3N4 as tunnel dielectric material. Due to non-similar doping of the regions there is no ambipolarity in the device characteristics which further reduces the off currents by 9.29fA/μm. The on-current in this structure can be enhanced by increasing the height of the source region. Low threshold voltage (Vth) is achieved due to the band to band tunnelling through thin dielectric. At 4nm the threshold voltage......

Key Word: Double Gate (DG), Tunnel FET (TFET), Subthreshold Slope (SS), Heterostructure, Threshold Voltage, Ion, Ioff.

[1]. Probir K. Bondyopadhyay, “Moore’s Law Governs the Silicon Revolution,” in Proceedings of the IEEE, vol. 86, pp 1, Jan 1998.
[2]. Data from http://www.iwailab.ep.titech.ac.jp/pdf/201403dthesis/wu.pdf.
[3]. Data from http://www.silvaco.com/examples/tcad/section46/index.html.
[4]. K. Kim and J. Fossum, “Double-Gate CMOS: Symmetrical- Versus Asymmetrical-Gate Devices,” IEEE Trans. Electron Devices,
vol. 48, no. 2, pp. 294–299, Feb. 2001

ABSTRACT: The RAW (Restricted Access Window) component of the IoT network is deployed to reduce traffic and channel contention in dense and heterogeneous sensor network environment. It divides sensor nodes into groups and slots, allowing channel access only to one RAW slot at a time. Several algorithms and improved channel utilization optimization models have been proposed to optimize the RAW parameters, to ensure a contention free network or at least, minimally reduce it. These techniques often rely on previous traffic demands schedules, collision analysis......

Keywords: Resource allocation, station, network, nodes, simulation

[1]. Tian, L., Famaey, J., &Latre, S, “Evaluation of the IEEE 802.11ah Restricted Access Window mechanism for dense IoT networks”, IEEE 17th International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM), PP-1-10, 2016.
[2]. Slaoui, S. C., Dafir, Z., &Lamari, Y. (2018). E-Transitive: an enhanced version of the Transitive heuristic for clustering categorical data. Procedia Computer Science, 127, 26–34.
[3]. Gohar, A., Kyong H.K., & Ki-II, K. (2002). Adaptive TDMA Scheduling for Real-Time Flows in Cluster-Based Wireless Sensor Networks. Computer Science and Information System 13(2):475-492.
[4]. U., S., & A. V., B. (2018). Performance analysis of IEEE 802.11ah wireless local area network under the restricted access window-based mechanism. International Journal of Communication Systems, e3888
[5]. Michael Collins (2015). The Forward-Backward Algorithm. International Journal of Communication System, Volume 32, Issue 7, PP-1-20, 2019

ABSTRACT: Electronic circuits are exposed to very high energy radiation in the harsh conditions of outer space. This leads to soft errors such as single-event upsets (SEU), double-event upsets (DEU) and single-event transients (SET). The memory circuits are the most susceptible to these soft errors resulting in severe data loss. This paper proposes the design for an SRAM cell that is radiation hardened by design (RHBD). A comparative study of the standard SRAM cell and the RHBD SRAM cell indicates that the proposed design is resilient to SEUs and DEUs. The.....

Key Word: DEU; Radiation Hardening; RHBD; SET; SEU; DEU; SRAM

[1]. N. Chen, T. Wei, X. Wei and X. Chen, "A Radiation Hardened SRAM in 180-nm RHBD Technology," 2013 IEEE 11th International Conference on Dependable, Autonomic and Secure Computing, 2013, pp. 159-162
[2]. N. K. Z. Lwin, H. Sivaramakrishnan, K. -S. Chong, T. Lin, W. Shu and J. S. Chang, "Single-Event-Transient Resilient Memory for DSP in Space Applications," 2018 IEEE 23rd International Conference on Digital Signal Processing (DSP), 2018, pp. 1-5
[3]. Yuanyuan Han, Tongde Li, Xu Cheng "Radiation Hardened 12T SRAM With Crossbar-Based Peripheral Circuit in 28nm CMOS Technology," in IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 68, no. 7, pp. 2962-2975, July 2021
[4]. C. Naga Raghuram, B. Gupta and G. Kaushal, "Double Node Upset Tolerant RHBD15T SRAM Cell Design for Space Applications," in IEEE Transactions on Device and Materials Reliability, vol. 20, no. 1, pp. 181-190, March 2020
[5]. D. Patel and N. Gajjar, "An Investigation of Single Event Upset Hardened SRAM Bit Cells," 2021 International Conference on Advances in Electrical, Computing, Communication and Sustainable Technologies (ICAECT), 2021, pp. 1-