i-manager's Journal on Embedded Systems (JES)


Volume 3 Issue 3 August - October 2014

Research Paper

Advanced Embedded Electromagnetic Radiation Monitoring System

S. Venkatesulu* , S. Varadarajan**, M. N. Giri Prasad***, A. Chanrda Babu****
* Research Scholor, Jawaharlal Nehru Technological University, Anantapuram, India.
** Professor, Sri Venkateswara University, Tirupati, India.
*** Professor, Jawaharlal Nehru Technological University, Anantapuram, India.
****Associate Professor, Yogananda Institute of Technology and Science , Tirupati, India.
Venkatesulu.S., Varadarajan.S., Prasad,G.M.N., and Babu,C.A. (2014). Advanced Embedded Electromagnetic Radiation Monitoring System. i-manager’s Journal on Embedded System, 3(3), 1-8. https://doi.org/10.26634/jes.3.3.3295

Abstract

The design and implementation of Advanced Embedded Electromagnetic Radiation Monitoring System (AEERMS) for the monitoring of the non-ionizing Electromagnetic radiation is presented in this paper. AEERMS monitors the exposure of electromagnetic radiations continuously that are radiated from different RF sources. As per the pressing need, there is a tremendous increase in the usage of cellular mobile communications and broadcasting systems, which in turn increases the number of cell towers. All the cell towers together, transmit several tens to hundreds of watts of power, and the continuous exposure to this Electromagnetic (EM) radiation results in severe health problems like Brain Tumor, Blood Brain Barrier, Eye& Hearing etc. A systematic and continuous monitoring of the EM radiation is necessary to regulate the radiation level. The proposed system called AEERMS has the provision for continuous monitoring and display of radiation levels in the mobile network based on their frequency range and stores and/or transfers the data to concerned authorities. The proposed AEERMS was successfully implemented in measuring the radiated power of the received signals with frequency ranges from 80 MHz to 2.5 GHz. In addition to this, system is also capable of scanning all possible frequencies in its vicinity and thus measures the total radiated power for all the signal frequencies. The performance of the AEERMS is validated with BSNL drive test. Tirupati at GSM frequency of 1800.6 MHz and at 3G frequency of 2156 MHz. The AEERMS is set in use under different traffic conditions, viz., normal and busy traffic conditions, at various distances from the cellular base station. It is observed from the measured radiations that, the radiation level in busy hours is larger than that in normal hours, irrespective of the distance from the cellular base station. The radiation levels are indicated by the particular frequency and radiation in terms of power levels. If the radiation level is above -30 dBm, then the monitoring system indicates it as a dangerous level of radiation, and it sends short messages to the concerned authorities indicating about the dangerous level of radiation of particular frequency in a particular place. The radiation levels are taken from BioInitiative (report) 2007 and 2012.

Research Paper

Monitoring and Control of Greenhouse Gases Using Wireless Sensor Network

M. Rubina* , Vijaya Kumar**
* Student, K. S. Rangasamy College of Technology, Tiruchengode, Namakkal, India.
** Assistant Professor, K. S. Rangasamy College of Technology, Tiruchengode, Namakkal, India.
Rubina..M., Vijayakumar.M. (2014). Monitoring And Control Of Greenhouse Gases Using Wireless Sensor Network. i-manager’s Journal on Embedded System, 3(3), 9-17. https://doi.org/10.26634/jes.3.3.3296

Abstract

Certain Greenhouse gases present in the atmosphere cause a serious threat to earth, since it will lead to global warming, ozone depletion etc. The emission of such green house gases should be monitored and controlled. A wireless environment monitoring system with a capability to monitor greenhouse gases such as CO, CO2 , SOx , NOx , and O2 with environmental parameter is developed in the existing system. But there is no provision for the controlling unit. In the proposed work, a circuit for both the monitoring and controlling of the major greenhouse gases such as CO2 , SO2 is designed. So the overall system involves three processes namely, sensing the outlet gas, monitoring the process and controlling the concentration level of the gas. The Electrostatic precipitation method is used as a controlling mechanism, which can collect particles sized 0.1 to 10 microns very efficiently. The developed module is designed and implemented using LabVIEW software.

Research Paper

Power Efficient and High Speed Vedic Multiplier Using Subthreshold Adiabatic

M. Bharathi* , D. Sreehari**
* Student, Department of ECE, Siddartha Educational Academy Group of Institutions Integrated Campus, Tirupathi, India.
** HOD, Department of ECE, Siddartha Educational Academy Group of Institutions Integrated Campus, Tirupathi, India.
Bharathi.M., and Sreehari.D. (2014). Power Efficient And High Speed Vedic Multiplier Using Subthreshold Adiabatic. i-manager’s Journal on Embedded System, 3(3), 18-30. https://doi.org/10.26634/jes.3.3.3297

Abstract

Fundamental and the core of all the Digital Signal Processors (DSPs) are its multipliers and speed of the DSPs is mainly determined by the speed of its multipliers. Multiplication is the most fundamental operation with intensive arithmetic computations. Now a days, embedded systems are used for wide range of such applications. The power consumption, performance, and demanding security are the main issues in designing systems. To achieve this, authors combined the sub-threshold operation and charge recovery techniques. Using the technique, lower power consumption, ability of operating at higher frequencies, and more security than the existing logic circuits are achieved. Different methods of algorithms are used in multipliers to increase the performance. In this paper, 4*4 adiabatic multiplier versus 4*4 two phase clocking sub threshold adiabatic multiplier using Vedic mathematics are implemented. The power dissipation of two phase clocking sub threshold adiabatic is low when compared to their adiabatic multipliers. This paper is implemented in HSPICE using 0.18μm CMOS process technology.

Research Paper

Real Time User-Centric Energy Efficient Scheduling in Embedded Systems

R. Reddi Hemanth* , Madhu Kumar Patnala**
* Student, Department of ECE, Sree Vidyanikethan Engineering College, Tirupati, India.
** Assistant professor, Department of ECE, Sree Vidyanikethan Engineering College, Tirupati, India.
This paper has been retracted due to dual submission.
Research Paper

Efficient Sorting Mechanism for Finding First W Maxima/Minima Values

Kante Raj Kumar* , V. Thrimurthulu**
* PG Scholar, Department of Electronics and Communication Engineering, Chundi Ranganayakulu Engineering College, Tirupathi, India.
** Professor, Department of Electronics and Communication Engineering, Chundi Ranganayakulu Engineering College, Tirupathi, India.
Kumar,K,R., and Thrimurthulu.V. (2014). Efficient Sorting Mechanism For Finding First W Maxima/Minima Values. i-manager’s Journal on Embedded System, 3(3), 39-44. https://doi.org/10.26634/jes.3.3.3299

Abstract

Sorting is a deep-rooted problem in Computer Science and is a means of operation in quite a lot of applications. In this paper, the authors’ have proposed a complete VLSI model of sorting mechanism to find first maxima/minima values using (BWA) Bit Wise and Architecture. In this effort, a parallel radix-sort-based VLSI architecture for finding the first W maximum (or minimum) values is proposed. The described architecture, named Bit-Wise-And (BWA) architecture with an added advantage of high level scalability depends on analyzing input data from the most significant bit to the least significant one, the proposed scheme along with parallel structure has been modelled successfully on Xilinx Virtex -5 Fpga with a simple verilog RTL description.