Feb 20

The IUP Journal of Telecommunications

Focus

These use tiny routers that can be quickly displayed in the environment or embedded platforms onto robots and wearable equipment which connects automatically with other energy-efficient devices using an advanced Device-to-Device interface technology. These Your Own Internet (YOI) devices are set on batteries that can be deployed anywhere. Obviously, the growing data traffic concerns excessive energy consumption in such dynamic wireless networks and therefore puts challenging problems to the researchers to explore and develop new technological solutions of energy savings at the network level. The emerging outlook of green techniques in communication networks, which are designed taking care of the environment, energy saving and cognitive radio for an efficient usage of shared radio spectrum resources, has emerged as an area of much interest. The important issue of enhancing the energy efficiency of cellular networks without compromising on coverage and users' perceived Quality of Service (QoS) is to reduce the overall downlink energy consumption and maintain the target of spectral efficiency.

This issue contains four papers focusing on the challenges and research strategies being adopted in the present wireless communication networks to reduce the overall energy consumption in synergy with the environment. The first two papers deal with the physical layer network performance issues, and the next two papers discuss the hardware and software design implementation techniques to improve the network performance.

The first paper, "Green Mobile Communications in India: Emerging Technologies and Challenges", by Babji Prasad Chapa and Gottapu Sasibhushana Rao, presents a review report on various technologies used in realization of green mobile communication. The paper also discusses the usage and applications of massive MIMO antennas and beamforming technique as a case study of energy-efficient architecture for a wireless network.

Research and development of microstrip array antenna in wireless communication is extensively used with an optimized compositional and structural design. The second paper, "Design and Implementation of Microstrip Array Antenna for Weather Radar System", by Kanchan H Wagh and Shashank S Shriramwar, proposes a new design of a microstrip array antenna for weather radar system utilizing corporate feeding techniques maintaining a minimum return loss. The proposed antenna resonates at 5.8 GHz but depends on its design configuration and also the feeding techniques.

The third paper, "Gilbert Cell-Based Active Mixers: A Critical Study", by Avvaru Subramanyam and R V S Satyanarayana, discusses various structural designs of CMOS-based active mixer designs applicable for down conversion mixer of the RF receiver front end. The paper discusses various performance metrics like CG, NF, third-order Intercept Point (IP3) and 1-dB compression point related to linearity, isolation of ports, supply voltage and power consumption.

The information channel for a reliable and efficient image transmission requires suitable image processing techniques and this becomes more challenging for a wireless system. The last paper, "A Novel Technique with Lo Gradient Minimization for Rain-Free Images", by S Rakoth Kandan and N Dhanasekar, proposes a novel and efficient algorithm for detection of the image in a rainy environment by removal of rain effect from the image using Lo gradient minimization approach. The proposed algorithm is used in spotting and removing the rain effect from the sequential images. The findings confirm that the proposed algorithm is extremely efficient in removing the rain successfully in case of light and heavy rain.

-V K Chaubey,
Consulting Editor

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Article   Price (₹) Buy
Green Mobile Communications in India: Emerging Technologies and Challenges
50
Design and Implementation of Microstrip Array Antenna for Weather Radar System
50
Gilbert Cell-Based Active Mixers: A Critical Study
50
A Novel Technique with Lo Gradient Minimization for Rain-Free Images
50
     
Contents : Feb 20

Green Mobile Communications in India: Emerging Technologies and Challenges
Babji Prasad Chapa and Gottapu Sasibhushana Rao

Energy efficiency is an important issue in the proposed next-generation wireless communications as it severely affects human life on the earth. Two factors have mainly become an energy concern in the past decade: global warming due to CO2 emission and sea-level rise. Further, this issue has become a graver concern due to the ever increasing demand for data rates, spectral efficiency and quality of service combined with massive IoT communications. Therefore, there is a need for developing green mobile communications by 2020, which can ensure reduced energy consumption and increased battery life, besides increased capacity to enable massive deployment of small cell base stations. The proposed wireless communication network with the above features is referred to as an energy-efficient green mobile communication (5G). The paper surveys various technologies for realization of green mobile communication. Various technologies proposed for the realization of 5G are simultaneous wireless power and information transfer, massive Multiple Input Multiple Output (MIMO), millimeter waves and beamforming. An analysis has also been carried out in the case of the proposed massive MIMO antennas and beamforming technique as a case study of energy-efficient architecture.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 50

Design and Implementation of Microstrip Array Antenna for Weather Radar System
Kanchan H Wagh and Shashank S Shriramwar

Microstrip array antennae are the ultimate solution for a variety of system applications, including air traffic control and collision avoidance radar. A microstrip antenna array is used since it is easy to design and fabricate. It has small size, light weight and high gain. Microstrip antenna array design is an important area of research in radar system that can meet the subject requirement. Microstrip antennae are used in a variety of wireless applications, including radars, wireless sensor networks, cellular phones and in medical applications. The paper proposes a design of different microstrip array antennae for weather radar system. Corporate feeding technique is incorporated for the design of an array. The proposed antennae resonate at 5.8 GHz.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 50

Gilbert Cell-Based Active Mixers: A Critical Study
Avvaru Subramanyam and R V S Satyanarayana

Mixer, a frequency translator, plays a vital role in Radio Frequency (RF) communication. The paper studies the different structural designs of CMOS active mixers and explores down conversion mixer of the RF receiver front end. Different versions of Gilbert mixer-based designs like source degeneration, port matching networks, aspect ratio-based, charge injection, resistive load, current bleeding, Common Mode Feedback (CMFB), etc. are considered. For all these designs, Figure of Merit (FoM) is calculated. A comparison is made with reference to performance metrics, namely, Conversion Gain (CG), Noise Figure (NF), third-order Intercept Point (IP3) and 1-dB compression point related to linearity; isolation of ports, supply voltage and power consumption are tinted majorly. However, conciliation in performance metrics is found to be inevitable.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 50

A Novel Technique with Lo Gradient Minimization for Rain-Free Images
S Rakoth Kandan and N Dhanasekar

Detection and removal of rain in the image are a complicated and critical problem due to difficulty of rain and its negative effects on the image. The paper proposes a novel, efficient and simple algorithm for detection and removal of rain from the image using Lo gradient minimization that can commonly eliminate rain pixels from the image. The algorithm is easy to use and successful in spotting and removing rain of sequential images. This method does not depend on local features but as an alternative locates necessary edges globally. This relevant edge information will wait until all other information is extracted in this manner and then rain pixels are removed. Next, to improve contrast in images, intensity enhancing is done using histogram adjustment technique. To compare this result with other techniques, quality index has been measured for the rain removal image. Experimental results showed that the proposed algorithm is extremely efficient as it removes rain successfully for even light and heavy rain in the image.


© 2020 IUP. All Rights Reserved.

Article Price : ₹ 50

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