i-manager's Journal on Communication Engineering and Systems (JCS)


Volume 9 Issue 1 January - June 2020

Research Paper

New Approach of High Power Testing of Spacecraft Passive Components using Diplexer

Vidhi Panchasara * , Ramesh J Doshi **, Sunil Lavadiya ***
*-*** Marwadi Education Foundation's Group of Institutions, Gujarat Technological University, Ahmedabad, Rajkot, Gujarat, India.
** Space Application Centre, Indian Space Research Organization, Ahmedabad, Gujarat, India.
Panchasara, V., Doshi, R. J., and Lavadiya, S. (2020). New Approach of High Power Testing of Spacecraft Passive Components using Diplexer. i-manager's Journal on Communication Engineering and Systems,9(1), 1-7. https://doi.org/10.26634/jcs.9.1.17395

Abstract

The proposed work presents a new approach of high power testing setup. High power testing is required for all the passive components being used in the payload of the spacecraft. The multi-channel high power testing using conventional approach is more complex. To overcome the issues of conventional approach of high power test, this paper introduces a new approach of high power testing in which two signals can be processed through a single channel using waveguide diplexer. Use of diplexer results in reduction of travelling wave tube amplifier which reduces the complexity and cost of high power testing setup. This paper presents a design of Ku-band diplexer and new approach of high power testing using this diplexer. The diplexer has been designed with 11 GHz and 11.55 GHz center frequencies of pass bands with 30 dB return loss and 0.14 dB insertion loss in both pass bands.

Research Paper

Programmed Routing in the Direction of MST by Virtue of Port Dependent Decision Device

Sheryl Radley*
Department of Electronics and Communication Engineering, Meenakshi College of Engineering, Chennai, Tamil Nadu, India.
Radley, S. (2020). Programmed Routing in the Direction of MST by Virtue of Port Dependent Decision Device. i-manager's Journal on Communication Engineering and Systems,9(1), 8-17. https://doi.org/10.26634/jcs.9.1.17164

Abstract

The research discusses the proposed device by which routing is automated, which is named as Port Dependent Decision Device (P3D). This device communicates with the destination node before the packets are sent. This is done in order to avoid packet loss in a huge network. This paper discusses the implementation details of the proposed Multifarious Sym Teredo (MST) tunneling in a router linked with port dependent decision device (P3D). The manuscript presents the algorithm used by the P3D. The various network services such as FTP, TFTP, TELNET, HTTP, HTTPS, SFTP, RTP, VOD, SNMP, SMPT, VoIP, and SSH are discussed in this chapter. In addition, the implementation of automated routing towards MST by virtue of P3D on best performance in IPv4/IPv6 is discussed. The network metrics such as throughput, RTT, latency, loss rate and CPU utilization are used for performance evaluation.

Research Paper

Performance Evolution of Massive MIMO-OFDM for VLC Communications

B. Sridhar* , S. Sridhar **, V. Nanchariah ***
*-** Department of Electronics and Communication Engineering, Lendi Institute of Engineering and Technology, Vizianagaram, Andhra Pradesh, India.
*** Lendi Institute of Engineering and Technology, Vizianagaram, Andhra Pradesh, India.
Sridhar, B., Sridhar, S., and Nanchariah, V. (2020). Performance Evolution of Massive MIMO-OFDM for VLC Communications. i-manager's Journal on Communication Engineering and Systems,9(1), 18-25. https://doi.org/10.26634/jcs.9.1.17515

Abstract

The solution for mobile phone users and the need for high-speed data services that meets the traffic requirements of existing 4G networks, 5G networks have become the core technology and implementation technology for nextgeneration communication networks. A MIMO-OFDM, a fully generalized LED modulation system is proposed for VLC communications. LED signals are used in innovative ways as well as OFDM signal time/frequency field formation issues to improve the efficient spectrum (SE). The analytical investigation and experimental demonstration of the proposed ACOOFDM for massive MIMO internal systems has been performed. Moreover, the traditional OFDM performance is examined in this comparison system. The results of the analysis showed that massive MIMO-VLC that uses ACO-OFDM show less computational complexity on comparison than systems that use OFDM. Finally, the results show that this scheme can achieve better energy efficiency and spectrum performance with acceptable BER performance compared to related methods.

Research Paper

Design of LP-FBMC System for Multicarrier Transmission

Reddy Srinu* , R. Gurunadha **
* Department of Systems and Signal Processing, JNTUK University College of Engineering, Vizianagaram, Andhra Pradesh, India.
** Department of Electronics and Communication Engineering, JNTUK University College of Engineering, Vizianagaram, Andhra Pradesh, India.
Srinu, R., and Gurunadha, R. (2020). Design of LP-FBMC System for Multicarrier Transmission. i-manager's Journal on Communication Engineering and Systems,9(1), 26-33. https://doi.org/10.26634/jcs.9.1.17702

Abstract

Filter Bank Multi-Carrier (FBMC) is a tweak strategy with improved repulsive properties contrasted with Orthogonal Frequency Division Multiplexing (OFDM). In this paper, a changed linearly processed filter bank multicarrier (LP-FBMC) framework which utilizes a quicker than Nyquist signaling to eliminate remaining natural obstructions has been proposed. The proposed transmitter plays out the individual sifting for the even and odd-numbered sub-transporter images, separately. To fulfil the inferred symmetry conditions, a sub-block astute converse requesting system for the yields of the odd-numbered sub-carrier channel has been performed. Likewise, this paper shows that the proposed LP-FBMC framework fulfils the recommended symmetry conditions and can utilize the different yield transmission plans as the traditional OFDM frameworks. Singular value decomposition (SVD)- based framework directs change to change over the covered FBMC information into equal autonomous impedance free information. LP-FBMC framework is better than those of traditional quadrature plentifulness based (FBMC-QAM) and Orthogonal Frequency Division Multiplexing (OFDM) frameworks. Bit Error Rate (BER) is recognized using diverse balance methods. The spot mistake rate is determined and contrasted with diverse existing methods. The test results are performed utilizing MATLAB.

Review Paper

Issues in Wearable Electronics Devices for Wireless Sensor Network

K. Thamizhmaran*
Department of Electronics and Communication Engineering, Government College of Engineering, Bodinayakkanur, Theni, Tamilnadu, India.
Thamizhmaran, K. (2020). Issues in Wearable Electronics Devices for Wireless Sensor Network. i-manager's Journal on Communication Engineering and Systems,9(1), 34-38. https://doi.org/10.26634/jcs.9.1.17493

Abstract

Air media sensor network devices sense and communicate the information gathered from a monitored field through wireless links. The acquired data is forwarded through multiple nodes, and with a gateway, the data is connected to other networks. These networks are used to monitor physical or environmental conditions like sound, pressure, temperature and collectively pass data through the network to the main location. The WSN is incorporated into the wearable devices for various applications using various protocols to connect each node of the network. This paper describes the technology of implementing a WSN in a wearable device and the challenges imposed in working on the network.