orthogonal frequency division multiplexing presentation

... AN IMPROVED INTERPOLATION METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM USING PILOT SIGNALS AHMED NOORI HUMMADI THESIS SUBMITTED ... my examiners and all committee members for their helpful suggestions iv ABSTRACT Orthogonal Frequency Division Multiplexing (OFDM) system can achieve high data rates in mobile environment due

Ngày tải lên: 26/05/2013, 21:28

... Article ID 91329, Pages 1 12DOI 10.1155/WCN/2006/91329 High-Speed Turbo-TCM-Coded Orthogonal Frequency-Division Multiplexing Ultra-Wideband Systems Yanxia Wang, Libo Yang, and Lei Wei School of ... One of the UWB proposals in the IEEE P802.15 WPAN project is to use a multiband orthogonal frequency-division multiplexing (OFDM) system and punctured convolutional codes for UWB channels supporting ... inter-symbol interference (ISI) caused by multipath channels are equalization and orthogonal frequency-division multiplexing (OFDM) [4] OFDM is a promising solution for efficiently capturing multipath

Ngày tải lên: 22/06/2014, 22:20

... 1.3 Orthogonal frequency division multiplexing-based CR A CR requires a flexible and adaptive physical layer in order to efficiently perform its required tasks Orthogonal frequency division multiplexing ... medical band Trang 16MINLP Mixed integer nonlinear programmingOFDM Orthogonal frequency division multiplexing OFDMA Orthogonal frequency division multiple access SIND Signal to interference-plus-noise ... Trang 1ORTHOGONAL FREQUENCY DIVISIONMULTIPLEXING-BASED DYNAMIC SPECTRUM ACCESS HAMED AHMADI A THESIS SUBMITTED FOR THE

Ngày tải lên: 09/09/2015, 10:19

... tải hiệu quả hơn 2.2 Sự khác nhau giữa OFDM và FDM (Frequency Division Multiplexing) Kỹ thuật ghép kênh theo tần số FDM (Frequency Division Multiplexing) làtruyền đồng thời các tín hiệu nhánh ... hóa, kinh tế, chính trị, khoa học kỹ thuật rất đa dạng và phong phú Kỹ thuật OFDM (Orthogonal Frequency Division Multiplexing) đã từng là một bước đột phá quan trọng trong lĩnh vực truyền dẫn dữ ... như truyền hình vệ tinh 1.4 Tương lai phát triển của kỹ thuật OFDM Công nghệ OFDM (Orthogonal Frequency Division Multiplexing) đã và đang chứng minh vai trò quan trọng trong việc truyền dẫn dữ liệu

Ngày tải lên: 20/08/2024, 15:07

... television Coded Orthogonal Frequency Division Multiplexing • Need for a good transmission technique • Explanation of the different parts • Coded • Frequency Division Multiplexing • Orthogonal Trang ... description of COFDM Zeroth frequency = 0 gives Compare with IFT Equivalent if Trang 14Visualization of COFDM Trang 15Modulation of subcarriers Trang 16COFDM principle Trang 17Frequency Minimum Carrier ... 17Frequency Minimum Carrier Spacing Traditional SCPC Modulation Trang 18COFDM Orthogonal carriers Trang 19COFDM Orthogonal carriers Trang 21Subchannel response - pilots Trang 22Subchannel response

Ngày tải lên: 09/07/2014, 08:16

... Srikanth and P A Murugesa Pandian, Anna University Xavier Fernando, Ryerson University Orthogonal Frequency Division Multiple Access in WiMAX and LTE: A Comparison Group 4 – Trang 2 INTRODUCTION ... use several common technologies with subtle differences.The main common technology is orthogonal frequency-division multiple access (OFDMA). - There are many good reasons for choosing OFDMA such ... FROM SUBCARRIERSUSE OF OFDMA IN WIMAX AND LTE Subcarriers are the smallest granular units in the frequency domain, OFDM symbol duration is the smallest granular unit in the time domain in OFDMA

Ngày tải lên: 24/07/2015, 22:26

... station CDMA code division multiple access MSE mean square error CFO carrier frequency offset OFDM orthogonal frequency division multiplexing CP cyclic prefix OFDMA orthogonal frequency division multiple ... time division multiple access MF matched filtering WiMAX worldwide interoperability microwave access viii Summary In current broadband evolution of wireless communications, Orthogonal Frequency Division ... Synchronization of Orthogonal Frequency Division Multiple Access Systems”, in Proc., IEEE ICC 2001, pp.1674-1678 [22] L Kuang, J Lu and Junli Zheng, “Non-pilot-aided Carrier Frequency Tracking

Ngày tải lên: 14/09/2015, 14:03

... in this paper are quasistatic orthogonal relay channels for which orthogonality is defined accordingly to [1] Since the source-destination channel is assumed to be orthogonal to the relay-destination ... +wrd(n), (2) where the notation is defined above Orthogonality between the received cooperation signalyrdand direct signal ysdcan be implemented by frequency division (FD) The optimal bandwidth allocation ... pages doi:10.1155/2007/20258 Research Article Practical Quantize-and-Forward Schemes for the Frequency Division Relay Channel B Djeumou, 1 S Lasaulce, 1 and A G Klein 2 1 CNRS, Sup´el´ec, Paris

Ngày tải lên: 22/06/2014, 00:20

... access technologies based on orthogonal frequency division multiplexing (OFDM) air interface were chosen [8] In the downlink, the popular orthogonal frequency division multiple access ... orthogonal frequency division multiple access (OFDMA) scheme [26] with discrete fourier transform (DFT) precoding and equidistant frequency mapping [17, 24, 25, 27] or a code division ... CDD Cyclic Delay Diversity CDMA Code Division Multiple Access DFT Discrete Fourier Transform FDE Frequency Domain Equalizer FDMA Frequency Division Multiple Access FEC Forward

Ngày tải lên: 08/09/2015, 18:24

... It is evident that each frequency corresponds to a different wavelength This technique could be named either Frequency Division Multiplexing (FDM) or Wavelength Division Multiplexing (WDM) The ... generally reserved for very close frequency spacings (typically less than 50 GHz corresponding to 0.4 nm) The terminology is not set in concrete With wavelength division multiplexing it is possible ... CỘNG HƯỞNG GHÉP HƯỚNG CHO HỆ WDM DIRECT COUPLED RESONATORS BANDPASS FILTERS FOR WAVELENGTH DIVISION MULTIPLEXING SYSTEMS CHUYÊN NGÀNH MÃ SỐ NGÀNH : KỸ THUẬT VÔ TUYẾN ĐIỆN TỬ : 2.07.01/07

Ngày tải lên: 16/04/2021, 04:29

... 27Graphic  Presentation of a  Frequency  Distribution Graphic  Presentation of a  Frequency  Distribution Trang 28Graphic Presentation of a  Frequency Distribution Graphic Presentation of a  Frequency Distribution ... Histograms  Frequency Polygons or Line Charts Cumulative Frequency Distributions  The  three commonly used graphic forms  are: Histograms  Frequency Polygons  or Line Charts Cumulative Frequency Distributions ...  or Line Charts Cumulative Frequency Distributions   Trang 30Graphic Presentation of a  Frequency DistributionGraphic Presentation of a  Frequency Distribution 0     10     15     20     25     30     35       

Ngày tải lên: 04/02/2020, 07:37

... Trang 1PRESENTATION SKILLS -Introduction to Presentations -Presentation & Effective Oral Communication -Making Effective Presentation Trang 2is i Introduction to Presentation * The ... component ina presentation iS you Remember the presentation is made by you —Slide must contain the gist of the 4 douts Trang 5is i Effective Presentations ° At the onset of presentation, the ... objective is called a presentation °® An idea no matter how brilliant, would not see the light of day just because no one cared to present it in the right perspective AD a Trang 3is i Presentation and

Ngày tải lên: 09/08/2012, 14:03

... Trang 4ĐH FDM a » a, tụ % SI a, CHANNELS (FREQUENCY SLOTS - CHANNELS) Trang 5‘ TDM Guard, Time CHANNELS (TIME SLOTS - CHANNELS) Trang 6Time-Division Multiplexing - _ Truyền dẫn từ nhiêu nguồn ... sang mã Sau G6 được ghép kênh af so thời gian trên 1 môi trường truyên duy nhất Trang 7Time-Division Multiplexing - Trong TDM, mỗi thiết bị nguồn chiếm một băng thông truyền con với mỗi khe thời ... với bộ ghép kênh Trang 11125us PCM code PCM code Channel 1 Channel 2 Trang 12" Time-Division Multiplexing g n kênh: tí uyén (bandwidth) tại ngõ ra bộ o> ghép kênh là n channels

Ngày tải lên: 02/03/2013, 16:59

... Definition of PowerPoint presentation 8 1.2 The structure of a PowerPoint presentation 8 1.3 Types of presentations 9 1.3.1 Based on the presentation’s purpose 9 1.3.2 Based on the presentation’s manner ... PowerPoint presentation? A power point presentation is a presentation which is carried out with the support of PowerPoint, a presentation software program 1.2 The structure of a PowerPoint presentation ... Trang 11- Multimedia presentation:Multimedia presentation is a combination of written, oral and visual presentations, for example, a computer presentation such as Power Point presentation 1.4 The

Ngày tải lên: 18/04/2013, 08:57

... Carmine Gallo Columnist, Businessweek.com How to Be Insanely Great in Front of Any Audience The Presentation Secrets of Steve Jobs New York Chicago San Francisco Lisbon London Madrid Mexico City ... Numbers 105 SCENE 10 Use “Amazingly Zippy” Words 113 SCENE 11 Share the Stage 127 SCENE 12 Stage Your Presentation with Props 137 SCENE 13 Reveal a “Holy Shit” Moment 151 INTERMISSION 2 Schiller Learns ... That’s what happened when Apple announced that Jobs would not deliver his tradi- tional keynote presentation at Macworld Expo in 2009. (Apple also announced that it would be the last year in which

Ngày tải lên: 25/08/2013, 22:10

... can say thatthe frequency of 4100 Hz is folded into 3900 Hz, and 4000 Hz is hence calledthe “folding frequency.” In general, half the sampling frequency is known as thefolding frequency (expressed ... Nyquist frequency is 10 kHz, butthe Nyquist rate is still 6.8 kHz We will define half the sampling frequency asthe Nyquist frequency throughout this book Some authors define the Nyquistfrequency ... of the normalized frequency ω Therefore the range magni-[0 π ] corresponds to the actual frequency range [0 ω s /2] and the normalized frequency π corresponds to the Nyquist frequency (and 2π

Ngày tải lên: 29/09/2013, 21:20

... Trang 1Frequency Analysis Frequency analysis of any given signal involves the transformation of a time-domainsignal into its frequency components The need for describing a signal in the frequencydomain ... consists of an infinite number of frequency components,where thefrequency spacing between two successive harmonics is 1=T0 However,as discussed inChapter 3,the frequency range for discrete-time ... samples consists of frequencycomponents separated by 2p=N radians,or 1/N cycles Therefore the Fourier seriesrepresentation of the discrete-time signal will contain up to a maximum of N frequencycomponents

Ngày tải lên: 23/10/2013, 22:15

... relationship between the domestic division of labor and classes. This has not happened. While there are historical and qualitative case studies which examine the domestic division of labor and a few ... and the gender division of labor in the household. The basic objective of this chapter, then, is to explore empirically the relationship between class and the gendered domestic division of labor. ... the gender division of labor within families varies across locations within a class structure, the focus of analysis would be on how the. .. on how the gender division of

Ngày tải lên: 01/11/2013, 07:20

... Trang 1Lesson 16: A presentation – Part 2 (continued) Bài 16: Thuyết trình – Phần 2 (tiếp theo) Trần Hạnh và toàn Ban ... Hoá Dành Cho Người Lớn gọi tắt là AMES biên soạn tại thành phố Melbourne, Úc Châu Lesson 16: A presentation – Part 2 (continued) Bài 16: Thuyết trình – Phần 2 (tiếp theo) Bây giờ chúng ta tiếp ... trả lời Quí bạn đang theo dõi chương trình 'Tiếng Anh Thương mại' của Đài Úc Châu Lesson 16: A presentation – Part 2 (continued) Bài 16: Thuyết trình – Kỳ 2 (tiếp theo) Xin bạn lắng nghe những

Ngày tải lên: 11/12/2013, 16:16

... Trang 1THERMAL POWER PLANT PRESENTATIONTrang 2AIM OF THE PRESENTATIONGenerally the aim of this presentation is to get the general knowledge/ overview about the ... overview about the thermal power plant to involve with partner to the future project. Throughout the presentation we’ll discuss about our engineering capacity (manpower/ software/ design tool/ standard…)

Ngày tải lên: 19/12/2013, 15:23