iosr-JECE   Volume-17 ~ Issue-2 ~ Mar. - Apr. 2022

Abstract: Lidar is a laser-based remote measurement sensor that finds its best-known application in the study of the atmosphere. Our study on remote sensing by lidar system focuses on a few basic and fundamental principles on this one. Thus, included in this principle, it is necessary to know the type of detection that we should use for a defined study using lidars. The aim of this work is to start a study on the performance of lidar in direct detection and lidar in heterodyne detection.

Keywords: Lidar, direct detection, heterodyne detection, CNR

[1]. Céline Klein, « Design and prototyping of a lidar for measuring water content liquid in the fog », 2013
[2]. Ulla Wandinger, « Introduction to Lidar », 2000
[3]. David Daon, « Characterization of aerosols by inversion of the combined data of solar photometers and ground lidars », 2012
[4]. Claudine Besson and Dolfi-Bouteyre, «Recent development in fiber lidar », 2013
[5]. JL Meyzonnette, « Laser radars », 1992

Abstract: In this work, real time experiments evaluation of the 60 GHz 802.11ad live streaming was conducted. An error free 4k live transmission over 802.11ad up to distance of 22 m which is more than double the 802.11ad standard specification (10 m) was reported. Investigating in real time the effect of polarization on multi- channel transmission over this band and standards, using three different settings to provide 18 configurations shows that 60 GHz bands has the potential of supporting applications that requires ultra-high speed wireless links.......

Keywords: Millimetre wave, polarization. 4k UHD, Gigabytes, compute unified device architecture (CUDA), Shutter time, Frame.

[1]. Adewale Abe and Stuart D. Walker "Multi-hop 802.11ad Wireless H.264 Video Streaming" IEEE 2016 94-99
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[3]. H. Singh, J. Oh, C. Kweon, X. Qin, H.-R. Shao, and C. Ngo, \A 60 ghz wireless network for enabling uncompressed video communication," IEEE Communications Magazine, (46) 12, 2008 71-78.
[4]. J. M. Gilbert, C. H. Doan, S. Emami, and C. B. Shung, \A 4-gbps uncompressed wireless hd a/v transceiver chipset,"IEEEmicro,(28)2,2008,56-64.
[5]. S. Colonnese, G. Panci, and G. Scarano, \Error resilient video coding for wireless channels," in Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE InternationalSymposiumon,vol.4,2004,3040-30442004.

Abstract: The problems being experienced by video conferencing are voice and video packet end-to-end delay, video packets delay, and throughput. Worldwide Interoperability for Microwave Access (WIMAX) comes into use as subscribers demand for better quality of service in the area of voice and video multimedia applications with high-speed data connection, excellent security and mobility. There is a great need to show improvements in modulation scheme with respect to packet end-to-end delay, throughput and packet delay variation performance metrics. Hence, a quantitative approach was developed using the Optimized Network Engineering Tool (OPNET) Modeler to show improvements in modulation scheme........

Keywords: Modulation scheme, OPNET, Video Conference, WIMAX.

[1] Abdulrahaman, M. D., Faruk, N., Oloyede, A. A., Surajudeen-Bakinde, N. T., Olawoyin, L. A., Mejabi, O. V., Imam-Fulani, Y. O., Fahm, A. O. & Azeez, A. L. (2020). Multimedia Tools in the Teaching and Learning Processes: A Systematic Review. Heliyon Cell Press Journal.
[2] Abdulrazzaq, A. A., Abid, A. J. & Ali, A. H. (2018). QoS Performances Evaluation for Mobile WIMAX Networks based on OPNET. International Journal of Applied Engineering Research, 13(9), 6545-6550.
[3] Aliu, D., Usman, A. D. & Sani, S. M. (2015). A Review on Scheduling Algorithms for Multicast Services over WiMAX Networks. International Journal of Scientific and Engineering Research, 6(6). 1584-1590.
[4] Bulira, D. & Walkowiak, K. (2012). Voice and video Streaming in wireless computer Networks – Evaluation of Network Delays. 2012 2nd Baltic Congress on Future Internet Communications.
[5] Garhwal, A. & Bhattacharya, P. P. (2012). A Review on WiMAX Technology. International Journal of Advances in Computing and Information Technology, 167-173.