iosr-JECE   Volume-2 ~ Issue-5

Paper Type	:	Research Paper
Title	:	Emergency Call for Help Wrist Module
Country	:	India
Authors	:	Krishnaswamy Kannan, R. Giri Seshadri
	:	10.9790/2834-0250104

Abstract: SOS- The distress signal as defined by the Morse code is used by stranded ships to call for help and support. .Life expectancy, self-support, security risks, emergency crises are all on the rise. We define a novel approach to SOS by designing an embedded system to send out the request for help to the responsive organizations of the Government forces. The proposed system has the capability of seeking immediate assistance from the Emergency Services in situations of critical emergency. The module exhibits pure automation by seeking assistance from Emergency Services automatically, in the case of accidents while allowing manual control in the event of a crime. This compact wrist module is capable of tracking the location of the victim and informing the Emergency Services as well as the victim's family in seconds making it an all-in-one solution to the emergency crises.
Keywords: Atmel Microcontroller AT89C52, GPS, GSM, National Instruments LabVIEW software

[1] Lawrence Letham, GPS Made Easy
[2] Micheal Mouly, The GSM System for Mobile Communications
[3] Larsen, LabVIEW for Engineers 1, 1st ed
[4] Arduino forum, http://www.arduino.cc/
[5] Wikipedia, http://en.wikipedia.org/

Paper Type	:	Research Paper
Title	:	Complementary Cumulative Distribution Function for Performance Analysis of OFDM Signals
Country	:	India
Authors	:	Parneet Kaur, Ravinder Singh
	:	10.9790/2834-0250507

Abstract: Peak-to-Average Power Ratio (PAPR) is an important parameter for the analysis of Orthogonal frequency division multiplexing (OFDM) signals. CCDF curves are known to have great importance in the study of signal performance on the basis of power level. This paper presents the CCDF performance of the OFDM signal with different number of carriers. Simulation is used to implement the CDF equation and its accuracy is checked on the results. Theoretical results and simulation results are compared.
Key words- Crest factor, CCDF, OFDM, PAPR, and PDF.

[1] Evegenii Krouk, Sergei Semnov , "Modulation and coding techniques in wireless communications", 2011.
[2] Yong soo cho, Jaekwon Kim, Won young Yang and Chung G. Kang, MIMO- OFDM wireless communication with MATLAB.
John Wiley & Sons. (2010).
[3] Van Nee, R. and deWild, A "Reducing the peak-to-average power ratio of OFDM." IEEE VTC'98, vol.3, pp. 18–21, .May 1998.
[4] Ashraf A. Eltholth, Adel R. Mekhail, A.Elshirbini, M.I. Dessouki , A.I. Abdelfattah , " Low crest factor modulation technique s for
orthogonal frequency division multiplexing (OFDM)",UBICC, Ubiquitous computing and communication Journel, Vol 4, 2007.
[5] Ming kang , Lin Yang, Mohamed–Slim Alouini, "Capacity of MIMO Ricean channels with multiple correlated Rayleigh co-channel
interferers.", IEEE , pp 2636-2647, Oct. 2003.
[6] Yonglan Zhu, pooi yuen kam, Yan Xin, " On the mutual information distribution of MIMO Ricean fading channels.", IEEE Trans.
Communications, May 2009.
[7] Palicot, J. and Louet,Y. Power ratio definitions and analysis in single carrier modulations. EUSIPCO, Antalya, Turkey, Sep. 2005.

Paper Type	:	Research Paper
Title	:	Dash7: Performance
Country	:	India
Authors	:	Mohammad Arsalan, Ahmad Umair,Varun Kumar Verma
	:	10.9790/2834-0250811

Abstract: A new wireless sensor networking technology, DASH7 uses the ISO/IEC 18000-7 standard for active RFID. It operates in the 433 MHz unlicensed spectrum. DASH7 provides many advantages over other wireless technologies such as multi-year battery life, dynamic range of up to 2 Km (potentially farther) etc.DASH7 is the name of the technology promoted by the non-profit consortium called the DASH7 Alliance. DASH7 follows the ISO/IEC 18000-7 open standard for the license-free 433 MHzISM band air interface for wireless communications. 433 MHz was first reserved for military purpose but is now available for use worldwide. DASH7 networking technology was originally created for military use and is now being re-purposed for many commercial applications in place of wireless protocols like ZigBee or IEEE 802.15.4.
Keywords–433 MHz, DASH7, RFID, Zigbee, ISO/IEC 18000-7

[1] JP Norair, BLAST reference, Introduction to DASH7 Tec., March 2009.
[2] Wikipedia, www.wikipedia.org/wiki/dash7 accessed on 3 May,2012
[3] DASH7 Org, www.dash7.org/index.php accessed on 4 May,2012
[4] Lawrence Harte, Steve Kellogg, Richard Dreher, The Comprehensive Guide to Wireless Technology, (APDG Publication; 1st edition)
[5] RFID Journal, www.rfidjournal.com/whitepapers/11
[6] EETimes, Introduction-to-DASH7-Technologies, http://www.eetimes.com/electrical-engineers/education-training/tech papers/4135414