to do this. Code Division Multiple Access is a new technology used in wireless communication devices. This technology made its commercial debut in the early nineties. Significant advantage of the CDMA is the fact that unlike other modulation schemes it does not have to allocate part of the frequency for each user. It allocates whole frequency spectrum to each user‚ distinguishing each signal with the unique pseudo-random sequence. CDMA stands for "Code Division Multiple
Premium Management United States Crime
Stress‚ the disruption of the homeostatic balance by internal or external influences‚ is inherent‚ inevitable and exists in every stages of life‚ starting as early as the fetal stage till one’s death. In particular‚ early life stress (ELS) has come to light in recent years as it is becoming more prevalent and epidemiological studies have shown that ELS increases one’s vulnerability to subsequent stressors‚ leading to a multitude of stress-related neuropsychiatric disorders such as depression and
Premium Psychology Posttraumatic stress disorder Psychological trauma
Security Mechanisms in 2G and 3G Prasenjit Das(0710434) Student‚ Dept. of Computer Sc. & Engineering National Institute of Technology Agartala‚ Agartala‚ Tripura (w)‚ India dprasenjit83@yahoo.in Debapriya Banik(0710411) Student‚ Dept. of Computer Sc. & Engineering National Institute of Technology Agartala‚ Agartala‚ Tripura (w)‚ India debu_nita@yahoo.com Abstract. With the advent of 2G & 3G technologies we have stepped into an era of social globalization
Premium GSM Password Authentication
Contents Question-1 2 Question-2 3 Question-3 6 Question-4 7 Question-5 8 Question-6 9 Question-7 10 Question-8 11 Question-1 Discuss the two basic “media access control” methods for shared media used in the TCP/IP suite. ANSWER: In the Open Systems Interconnection (OSI) model of communication‚ the Media Access Control layer is one of two sub layers of the Data Link Control layer and is concerned with sharing the physical connection to the network among several computers. Each computer
Premium OSI model Ethernet Virtual private network
time. 7. Photodiode – A component that converts light energy into electrical energy. The photodiode is used as the receiving end of a fiber-optic link. 8. Amplitude Modulation – A method of signal transmission in which the amplitude of the carrier is varied in accordance with the signal. With respect to optical fiber cabling‚ the modulation is done by varying the amplitude of a light wave‚ common in analog/RF applications. 9. Analog Transmission – a transmission method of conveying voice‚ data‚ image
Premium Optical fiber Refractive index Total internal reflection
at yhe same time. In a half-duplex system‚ one end of the link must finish transmittin before the othet end may begin. 6. FULL-DUPLEX: A system in which signals may be transmitted in two directions at the same time. 7. PHOTODIODE: 8. AMPLITUDE MODULATION: 9. ANALOG TRANSMISSION: 10. DIGITAL TRANSMISSION: 11. SAMPLE RATE: 12. ELECTROMAGNETIC WAVE: 13. REFRACTION: 14. MEDIUM: 15. TOTAL INTERNAL REFLECTION: 16. FRESNEL REFLECTION: 17. TENSILE REFLECTION: 18. DESPERSION: 19. BANDWIDTH: 20. POLARITY:
Premium Total internal reflection Optical fiber Snell's law
J. S. Bach and the Second Brandenburg Concerto In December 1917‚ Johann Sebastian Bach began working as Prince Leopold of Cothen’s Kappelmeister (German: “chapel master‚” director of music)‚ tasked with composing for celebrations and holidays. A lover of music‚ the prince held Bach in high esteem; paying Bach more than twice the salary of his predecessor. Restricted by the chapel’s low-quality organ‚ Bach negotiated for new instruments in Carlsbad and Berlin‚ traveling with the prince throughout
Premium Johann Sebastian Bach
increase of digital data‚ new compression technologies are needed for more efficient representation of information. We introduce a physics-based transform that enables image compression by increasing the spatial coherency. We also present the Stretched Modulation Distribution‚ a new density function that provides the recipe for the proposed image compression. Experimental results show pre-compression using our method can improve the performance of JPEG 2000 format. Index Terms—Anamorphic transform‚ diffractive
Premium Data compression
Pakistan Telecommunication Company Limited Internship Complementation Report Wireless & Transmission FTRP Faisalabad Submitted by: ABDUL BASIT BSc Electrical Engineering (2010-14) Registration No. 2010-GCUF-4180-522 Government College University Faisalabad Submitted to: Mr. Muhammad Mehmood Manager‚ MSC Wireless FTRP Faisalabad Contents Topic | Page No. | Background | 3 | Introduction | 3 | Wireless Communication
Premium Mobile phone Cellular network GSM
5.6.4.1 Fixed frequency system 5.6.4.2 Variable frequency systems 5.6.5 Frequency multiplication 5.6.5.1 Frequency doubler 5.6.5.2 Frequency tripler 5.6.6 Direct digital synthesis 5.6.7 Frequency mixing and modulation 5.6.8 AM modes 5.6.8.1 Low level 5.6.8.2 Advantages 5.6.8.3 Disadvantages 5.6.8.4 High level 5.6.8.5 Advantages 5.6.8.6 Disadvantages 5.6.9 FM modes 5.6.9.1 Direct FM 5.6.9.2 Indirect FM
Premium