multiple access techniques for wireless communication ppt

Ngày tải lên: 11/07/2014, 21:20

Ngày tải lên: 22/06/2014, 19:20

... interests include multiple access techniques, estimation theory, multi-user detection and channel modeling. “I am extremely grateful to my parents for the sacrifices they have made and for imparting ... of wireless telecommunications, a number of trends are gaining widespread popularity. Among these is the explosion of interest in multi-carrier communications, and its application to wireless multiple- access. ... mobiles from TDMA (time division multiple access) to DS-CDMA (direct sequence code division multiple access) to MC-CDMA to OFDM, while maintaining a common hardware platform. In this chapter, we demonstrate...

Ngày tải lên: 02/03/2013, 16:59

... 44 2.5.3 Wireless Local Area Network (WLAN) Standards 46 2.6 Summary 48 3 Multiple Access in Cellular Communication Systems 49 3.1 Multiple Access and the OSI Layers 49 3.2 Basic Multiple Access ... Protocol for Hybrid CDMA/TDMA 12 1.4.1 Why Combine CDMA and PRMA? 12 1.4.2 Hybrid CDMA/TDMA Multiple Access Schemes 14 1.4.3 Literature on Multiple Access Protocols for Packet CDMA 15 1.4.4 Access ... individual portions of its resources to support multiple communications, basic multiple access techniques (such as frequency-, time-, or code-division multiple access, with FDMA, TDMA, and CDMA as their...

Ngày tải lên: 02/03/2013, 16:59

... convenient measure for measuring the signal levels in Lecture 14.doc Page 5 (6) CSN200 Introduction to Telecommunications, Winter 2000 Lecture 14 Communication Basics Part-2 telecommunications ... 14.doc Page 6 (6) CSN200 Introduction to Telecommunications, Winter 2000 Lecture 14 Communication Basics Part-2 The Theoretical Basis for Data Communication: Frequency-domain concept: A ... Introduction to Telecommunications, Winter 2000 Lecture 14 Communication Basics Part-2 Addition of More Frequency Components: Lecture 14.doc Page 3 (6) CSN200 Introduction to Telecommunications,...

Ngày tải lên: 10/12/2013, 08:15

... centralize multiple alarm circuite into a single connection/interface point. Contact product management or TAC for more information. X X Connectivity Solutions and Services for Wireless Networks Enabling ... business strategy when it comes time for any future upgrades, where flexibility is crucial for ongoing success. For ‘Flexible Network’ network solutions, look to ADC for the copper and fiber infrastructure ... Services for Wireless Networks Enabling Voice, VoIP, Messaging and IP Data ADC Solution Network Location MSC Hut/CEV/BSC Customer Premises/ Cell Site PowerWorx đ Platform PowerWorx platforms...

Ngày tải lên: 17/01/2014, 11:20

... ground fixed/mobile platform, and (3) the space platform. 4 RF MEMS Circuit Design for Wireless Communications Information  Voice  Broadband data  Messaging  Navigation  DBS  Internet  Video Wireless ... 4 1 3 3 p (2.29) 28 RF MEMS Circuit Design for Wireless Communications 2 Elements of RF Circuit Design 2.1 Introduction The design of RF MEMS circuits for wireless applications is predicated upon the ... Design for Wireless Communications 86% 11% 3% 2000 81% 15% 4% 2001 75% 20% 5% 2002 70% 25% 5% 2003 Phone line Power line Wireless Figure 1.4 Distribution of interconnection media usage for home...

Ngày tải lên: 19/01/2014, 20:20

... MHz). For cell phones held against the ear, the SAR drops off rapidly for the regions of the brain away from the antenna and is negligible for the rest of the human body except for the hand. Wireless ... models of several heights for men, women, and chil- dren of various ages for use in the characterization of SAR distributions for exposures characteristic of cell phones, wireless PCs, and base ... implanted medical devices for the human body. 3. There is a need for improved exposure systems for human labo- ratory studies including reliable and accurate exposure assessment for designs of next...

Ngày tải lên: 15/03/2014, 15:20

... Visit AFT’s Web site for classroom resources at www.aft.org/tools4teachers today. Assigning Effective Homework Quality Classroom Assessment Techniques Techniques Loan Forgiveness Creating ... the safest environ- ments for children. However, in far too many schools, a lack of respect for the authority of teachers and other school employees, as well as for the rights of other students, ... practices—based on research and demonstrated to work—that are eective for preventing and correcting this behavior. Techniques for managing the aggressive behavior of students include prevention...

Ngày tải lên: 17/03/2014, 20:20

... circuits. Fundamentals of microfabrication techniques employed for making AlN CMR are briefly introduced. Different methods for arraying these devices and form either electrically or mechanically ... increasing recent interest in wireless applications [41–43] has generated new efforts to miniaturize and integrate the off-chip passives needed for filtering and frequency generation in communication circuits. ... therefore enabling multiple frequencies of vibration on the same silicon chip and greatly reducing manufacturing tolerances to film thicknesses. In general, the equivalent circuit representation for...

Ngày tải lên: 30/03/2014, 07:20

Ngày tải lên: 31/03/2014, 12:20

Ngày tải lên: 04/04/2014, 05:21

... 594 forced attrition, 118 forecasting EBCF (existing base churn forecast), 469 NSF (new start forecast), 469 survival analysis, 415–416 former customers, customer relationships, 457 forward-looking ... rules, 297–298 information competitive advantages, 14 data as, 22 infomediaries, 14 information brokers, supermarket chains as, 15–16 information gain, entropy, 178–180 information technology, ... logarithms, data transformation, 74 logical schema, OLAP, 478 logistic methods, box diagrams, 200 long form, census data, 94 long-term trends, 75 lookup tables, auxiliary information, 570–571...

Ngày tải lên: 21/06/2014, 04:20

... cycle of data mining in action. A Wireless Communications Company Makes the Right Connections The wireless communications industry is fiercely competitive. Wireless phone companies are constantly ... Mining data to transform the data into actionable information. 3. Acting on the information. 4. Measuring the results. business opportunities Act where analyzing data on the information. can ... can provide value. into actionable information using data mining techniques. Identify Transform data 1 2 3 4 5 6 7 8 9 10 Measure the results of the efforts to complete the learning cycle....

Ngày tải lên: 21/06/2014, 04:20

... customers in California for the challenger and everyone else for the champion. ■■ Use the 5 percent lowest and 5 percent highest value customers for the challenger, and everyone else for the champion. ... most recent customers for the challenger, and every- one else for the champion. ■■ Use the customers with telephone numbers for the telemarketing cam- paign; everyone else for the direct mail ... such systematic bias. When there is systematic bias, the formulas for the confidence intervals are not correct. Using the formula for the confidence interval means that there is no system- atic...

Ngày tải lên: 21/06/2014, 04:20

Ngày tải lên: 21/06/2014, 04:20

Ngày tải lên: 21/06/2014, 05:20

Ngày tải lên: 21/06/2014, 22:20

Ngày tải lên: 21/06/2014, 22:20