line 1. INTRODUCTION Wireless ad hoc networks have emerged to support applications‚ in which it is required/desired to have wireless variety of devices without relying on communications among a any infrastructure or central management. In ad hoc networks‚ wireless devices‚ simply called nodes‚ have limited transmission range. Therefore‚ each node can directly communicate with only those within its transmission range (i.e.‚ its neighbours) and requires other nodes to act as routers in
Premium Algorithm Real number Computer network
PERFORMANCE OF TURBO CODED OFDM IN WIRELESS LOCAL AREA NETWORK (WLAN) List of Abbreviations GSM Global System for mobile communications GPRS General Packet Radio System EDGE Enhanced Data rates for Global Evolution IEEE Institute of Electrical and Electronics Engineers MC-CDMA Multiple-Carrier Code Division Multiplex W-CDMA Wideband-Code Division Multiple Access OFDMA
Premium Error detection and correction Wireless Wireless LAN
Abstract: Wireless technologies have experienced an enormous growth in the last decades. The wireless personal area networks (WPANs) and wireless local area networks (WPANs) are heterogeneous networks which are used in different applications. Two networks‚ called Wifi (IEEE 802.11 WLAN) and ZigBee (IEEE 802.15.4 WPAN)‚ which operates in 2.4 GHz frequency. Spectrum sharing is an effective technique which is used to enhance spectrum utilization. However the coexistence and Interoperability is a critical
Premium Mobile phone Internet Bluetooth
CHAPTER 1 Introduction Chapter 1 Introduction 1.1 What is WLAN? 1.1.1 WLAN Wireless Local Area Network (WLAN) is a kind of local area network which established using a wireless link between the service providers and the clients using some wireless equipment. This network development is based on the IEEE 802.11 standard. 1.1.2 IEEE 802.11 IEEE 802.11 denotes a set of Wireless LAN/WLAN standards developed by working group 11 of the IEEE LAN/MAN Standards Committee (IEEE 802). The term
Premium Wi-Fi
EC2043 WIRELESS NETWORKS UNIT I PHYSICAL AND WIRELESS MAC LAYER ALTERNATIVES PART – A (2 Marks) 1. Name five design consideration in selecting a modulation scheme for a wireless networks. 2. Why is out of band of radiation an important issue in designing modulation scheme? 3. Why is PPM used with IR communication instead of PAM? 4. Name four space diversity techniques. 5. What are the advantages of high efficiency voice band modems
Premium Wireless LAN Cellular network Wi-Fi
Wired and Wireless‚ What’s the Difference? The main difference between a wired and wireless data communication infrastructure is the existence of physical cabling. The same or similar techniques are employed for both types of data communication infrastructure in terms of the core elements of essential network services. The basic difference between a wired and a wireless network is self-explanatory. A wired network uses wires to communicate whereas a wireless network uses radio waves. Another difference
Premium Computer network Ethernet Internet
Wireless Network Security Partha Dasgupta and Tom Boyd Dept. of Computer Science and Engineering Fulton School of Engineering Arizona State University partha@asu.edu‚ tboyd@asu.edu Abstract Wireless networking is inherently insecure. From jamming to eavesdropping‚ from man-inthe middle to spoofing‚ there are a variety of attack methods that can be used against the users of wireless networks. Modern wireless data networks use a variety of cryptographic techniques such as encryption and authentication
Premium Wireless network Wireless LAN Wireless
Chapter 3 Mobile Radio Propagation: Large-Scale Path Loss 1. (a) Explain the advantages and disadvantages of the 2-ray ground reflection model in the analysis of path loss. (b) What insight does the 2-ray model provide about large-scale path loss that was disregarded when cellular systems used very large cells? 2 .In a 2-ray ground reflected model‚ assume that must be kept below 6.261 radians for phase cancellation reasons. Assuming a receiver height of 2 m‚ and given a requirement that be less
Premium Radio Decibel Amplifier
interest in wireless sensor networks can be promptly understood simply by thinking about what they essentially are: a large number of small sensing self-powered nodes which gather information or detect special events and communicate in a wireless fashion‚ with the end goal of handing their processed data to a base station. Sensing‚ processing and communication are three key elements whose combination in one tiny device gives rise to a vast number of applications [A1]‚ [A2]. Sensor networks provide
Premium Wireless sensor network Sensor Sensor node
Different wireless companies such as T-Mobile‚ Sprint‚ AT&T‚ Verizon‚ and many other try to persuade you to believe that their wireless network is the best. IP networks form the backbone of worldwide digital networking. They have encouraged the merger of voice‚ data‚ and radio waves‚ which can be digitized into packets and sent via any digital network (Turban‚ Volonino). This convergence is happening on a much more global scale and is changing the way in which people‚ devices‚ and applications communicate
Premium