1,519 Ofdm PPTs View free & download

ofdm ofdm ofdm ofdm ofdm ...

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OFDM - additional interference leads to an increase in the Bit Error Rate (BER) of the system. ... implementation of Tone Reservation Algorithm and Comparison with ...

additional interference leads to an increase in the Bit Error Rate (BER) of the system. ... implementation of Tone Reservation Algorithm and Comparison with ...

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MIMO-OFDM - MIMO-OFDM MIMO High diversity gain (space-time coding) High multiplexing gain (BLAST) OFDM Bandwidth efficient Robust to multipath fading thanks to cyclic prefix

MIMO-OFDM MIMO High diversity gain (space-time coding) High multiplexing gain (BLAST) OFDM Bandwidth efficient Robust to multipath fading thanks to cyclic prefix

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OFDM - It distributes the data over a large number of carriers that are spaced apart at ... Fast-hopped OFDM. Wide-band spread-spectrum technology ...

It distributes the data over a large number of carriers that are spaced apart at ... Fast-hopped OFDM. Wide-band spread-spectrum technology ...

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OFDM??????PAPR???? PowerPoint PPT Presentation

OFDM??????PAPR???? - Title: OFDM PAPR Author: ffl Last modified by: ffl Created Date: 12/22/2004 2:11:00 AM Document presentation format:

Title: OFDM PAPR Author: ffl Last modified by: ffl Created Date: 12/22/2004 2:11:00 AM Document presentation format:

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OFDM Equalization PowerPoint PPT Presentation

OFDM Equalization - Title: OFDM study IQ-Imbalance Compensation in the Presence of IBI and CFO Author: Kuo-Hsing Juan Last modified by: Kuo-Hsing Juan Created Date

Title: OFDM study IQ-Imbalance Compensation in the Presence of IBI and CFO Author: Kuo-Hsing Juan Last modified by: Kuo-Hsing Juan Created Date

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OFDM System Performance PowerPoint PPT Presentation

OFDM System Performance - OFDM System Performance ... about 2 dB separates the 1% from the 10 % point Rayleigh fading causes frequent swings to low SNR level What we ran in place of ...

OFDM System Performance ... about 2 dB separates the 1% from the 10 % point Rayleigh fading causes frequent swings to low SNR level What we ran in place of ...

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OFDM - Equal receive power at access point. Distributed channel ... (Specifically a tragedy of the commons) Case Study 2: Channel Limited Throughput Maximization ...

Equal receive power at access point. Distributed channel ... (Specifically a tragedy of the commons) Case Study 2: Channel Limited Throughput Maximization ...

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MIMO-OFDM Wireless Communications with MATLAB PowerPoint PPT Presentation

MIMO-OFDM Wireless Communications with MATLAB - Wireless Communications with MATLAB Chapter 4. Introduction to OFDM Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang

Wireless Communications with MATLAB Chapter 4. Introduction to OFDM Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang

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MIMO-OFDM Wireless Communications with MATLAB - Page * MIMO-OFDM Wireless Communications with MATLAB Yong Soo Cho, Jaekwon Kim, Won Young Yang, ... (STBC) - 10.3.1 Alamouti Space-Time Code ...

Page * MIMO-OFDM Wireless Communications with MATLAB Yong Soo Cho, Jaekwon Kim, Won Young Yang, ... (STBC) - 10.3.1 Alamouti Space-Time Code ...

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MIMO-OFDM Wireless Communications with MATLAB - Wireless Communications with MATLAB Chapter 6. Channel Estimation Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang Page * MIMO-OFDM Wireless Communications ...

Wireless Communications with MATLAB Chapter 6. Channel Estimation Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang Page * MIMO-OFDM Wireless Communications ...

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CDMA, OFDM - CDMA, OFDM CDMA Code Division Multiplexing CDMA Used in 3G networks. Direct Sequence Spread Spectrum: spread a data bit into multiple chips. Each sender has a unique ...

CDMA, OFDM CDMA Code Division Multiplexing CDMA Used in 3G networks. Direct Sequence Spread Spectrum: spread a data bit into multiple chips. Each sender has a unique ...

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CDMA (over) OFDM PowerPoint PPT Presentation

CDMA (over) OFDM - ... when Nyquist filters are used within DS-CDMA, RAKE may wrongly combine paths) ... It may be difficult for DS-CDMA RAKE to employ all the received signal energy ...

... when Nyquist filters are used within DS-CDMA, RAKE may wrongly combine paths) ... It may be difficult for DS-CDMA RAKE to employ all the received signal energy ...

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MIMO-OFDM Wireless Communications with MATLAB - Wireless Communications with MATLAB Chapter 12. Exploiting Channel State Information at the Transmitter Side Yong Soo Cho | Jaekwon Kim

Wireless Communications with MATLAB Chapter 12. Exploiting Channel State Information at the Transmitter Side Yong Soo Cho | Jaekwon Kim

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MIMO-OFDM Wireless Communications with MATLAB - Wireless Communications with MATLAB Chapter 9. MIMO: Channel Capacity Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang Page * MIMO-OFDM Wireless ...

Wireless Communications with MATLAB Chapter 9. MIMO: Channel Capacity Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang Page * MIMO-OFDM Wireless ...

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MIMO-OFDM Wireless Communications with MATLAB - Wireless Communications with MATLAB Chapter 1. The Wireless Channel : Propagation and Fading Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang

Wireless Communications with MATLAB Chapter 1. The Wireless Channel : Propagation and Fading Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang

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MIMO-OFDM Wireless Communications with MATLAB - Wireless Communications with MATLAB Chapter 8. Inter-Cell Interference Mitigation Techniques Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang

Wireless Communications with MATLAB Chapter 8. Inter-Cell Interference Mitigation Techniques Yong Soo Cho | Jaekwon Kim Won Young Yang | Chung G. Kang

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Orthogonal Frequency Division Multiplexing - OFDM PowerPoint PPT Presentation

Orthogonal Frequency Division Multiplexing - OFDM - Orthogonal Frequency Division Multiplexing - OFDM Djamel Sadok Agenda Os problemas Inter-Carrier Interference (ICI) Inter-Symbol Interference (ISI) A solu o: OFDM ...

Orthogonal Frequency Division Multiplexing - OFDM Djamel Sadok Agenda Os problemas Inter-Carrier Interference (ICI) Inter-Symbol Interference (ISI) A solu o: OFDM ...

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OFDM Receiver Design PowerPoint PPT Presentation

OFDM Receiver Design - A Robust Double Correlation (Correlation & Auto-Correlation) Based Algorithm ... Protect against frequency selective fading. Simulation Results. Simulation parameters: ...

A Robust Double Correlation (Correlation & Auto-Correlation) Based Algorithm ... Protect against frequency selective fading. Simulation Results. Simulation parameters: ...

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WiMAX OFDM PHY Overview PowerPoint PPT Presentation

WiMAX OFDM PHY Overview - Title: OFDM System: The Application in WiMAX Author: Jacky Last modified by: Jacky Created Date: 10/17/2006 8:23:09 AM Document presentation format

Title: OFDM System: The Application in WiMAX Author: Jacky Last modified by: Jacky Created Date: 10/17/2006 8:23:09 AM Document presentation format

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Signal Processing for OFDM Communication Systems PowerPoint PPT Presentation

Signal Processing for OFDM Communication Systems - Title: LDPC Overview and Implementation Author: Eric Jacobsen Last modified by: eajacobs Created Date: 12/6/2002 12:58:45 AM Document presentation format

Title: LDPC Overview and Implementation Author: Eric Jacobsen Last modified by: eajacobs Created Date: 12/6/2002 12:58:45 AM Document presentation format

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Introduction to OFDM PowerPoint PPT Presentation

Introduction to OFDM - Title: Author: Last modified by: wada Created Date: 5/28/1995 4:02:17 PM Document presentation format

Title: Author: Last modified by: wada Created Date: 5/28/1995 4:02:17 PM Document presentation format

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Orthogonal Frequency Division Multiple Access (OFDMA) PowerPoint PPT Presentation

Orthogonal Frequency Division Multiple Access (OFDMA) - Each terminal transmits in a decentralized way ... m-th and n-th harmonics of w respectively. 15. Orthogonal Frequency Division Multiplexing(OFDM) ...

Each terminal transmits in a decentralized way ... m-th and n-th harmonics of w respectively. 15. Orthogonal Frequency Division Multiplexing(OFDM) ...

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OFDM - Definition. How it works. Uses. Definition ... the amount of crosstalk in ... are then transmitted simultaneously at different frequencies to the receiver. ...

Definition. How it works. Uses. Definition ... the amount of crosstalk in ... are then transmitted simultaneously at different frequencies to the receiver. ...

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Performance Bounds in OFDM Channel Prediction PowerPoint PPT Presentation

Performance Bounds in OFDM Channel Prediction - Title: Slide 1 Author: Sande Storey Last modified by: Ian C. Wong Created Date: 10/7/2002 1:18:47 PM Document presentation format: On-screen Show Company

Title: Slide 1 Author: Sande Storey Last modified by: Ian C. Wong Created Date: 10/7/2002 1:18:47 PM Document presentation format: On-screen Show Company

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Sparse OFDM - Map the signal to a length N sparse vector. Some bits can be represented as the indices of ... k=sparsity the number of frequencies utilized. L=bits per symbol ...

Map the signal to a length N sparse vector. Some bits can be represented as the indices of ... k=sparsity the number of frequencies utilized. L=bits per symbol ...

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NEAR ML DETECTION OF NONLINEARLY DISTORTED OFDM SIGNALS PowerPoint PPT Presentation

NEAR ML DETECTION OF NONLINEARLY DISTORTED OFDM SIGNALS - Before transmission, the OFDM sequence is amplified by a nonlinear PA: ... Families of PAs - Solid State Power Amplifiers (SSPA): WiFi, WiMAX. - Traveling Wave Tube ...

Before transmission, the OFDM sequence is amplified by a nonlinear PA: ... Families of PAs - Solid State Power Amplifiers (SSPA): WiFi, WiMAX. - Traveling Wave Tube ...

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GSM, UMTS, WIFI, BLUETOOTH, OFDM, ADSL... PowerPoint PPT Presentation

GSM, UMTS, WIFI, BLUETOOTH, OFDM, ADSL... - GSM, UMTS, WIFI, BLUETOOTH, OFDM, ADSL... (Version provisoire et incompl te ; infos r cup r es sur diff rents sites) Merci de transmettre corrections

GSM, UMTS, WIFI, BLUETOOTH, OFDM, ADSL... (Version provisoire et incompl te ; infos r cup r es sur diff rents sites) Merci de transmettre corrections

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Resource Allocation for Mobile Multiuser OFDM Systems PowerPoint PPT Presentation

Resource Allocation for Mobile Multiuser OFDM Systems - Digital Video Broadcasting Terrestrial and Handheld ... Key collaborators: Prof. Jeff Andrews and Prof. Robert Heath. Key graduate students: ...

Digital Video Broadcasting Terrestrial and Handheld ... Key collaborators: Prof. Jeff Andrews and Prof. Robert Heath. Key graduate students: ...

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Efficient Collaborative (Viral) Communication in OFDM Based WLANs PowerPoint PPT Presentation

Efficient Collaborative (Viral) Communication in OFDM Based WLANs - Title: PowerPoint Presentation Author: Aggelos Bletsas Last modified by: Aggelos Bletsas Created Date: 2/3/2003 9:51:47 PM Document presentation format

Title: PowerPoint Presentation Author: Aggelos Bletsas Last modified by: Aggelos Bletsas Created Date: 2/3/2003 9:51:47 PM Document presentation format

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Wireless OFDM Systems PowerPoint PPT Presentation

Wireless OFDM Systems - Digital modulation scheme. Wireless counterpart to discrete multitone transmission ... Enables same radio/TV channel frequency throughout a country ...

Digital modulation scheme. Wireless counterpart to discrete multitone transmission ... Enables same radio/TV channel frequency throughout a country ...

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Orthogonal Frequency Division Multiplexing (OFDM) - Orthogonal Frequency Division Multiplexing (OFDM) OFDM Overview OFDM is a combination of modulation and multiplexing OFDM is a special case of FDM where K orthogonal ...

Orthogonal Frequency Division Multiplexing (OFDM) OFDM Overview OFDM is a combination of modulation and multiplexing OFDM is a special case of FDM where K orthogonal ...

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Equalisation Architectures for OFDM and 3G PowerPoint PPT Presentation

Equalisation Architectures for OFDM and 3G - RAKE: The performance is dominated by the MAI and this results in saturation at ... Step 2. A RAKE receiver then operates on the received signal and the composite ...

RAKE: The performance is dominated by the MAI and this results in saturation at ... Step 2. A RAKE receiver then operates on the received signal and the composite ...

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Spectrum Sharing in OFDM-Based Cognitive Radio Networks PowerPoint PPT Presentation

Spectrum Sharing in OFDM-Based Cognitive Radio Networks - none

none

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FDM versus OFDM PowerPoint PPT Presentation

FDM versus OFDM - Overlapping, but orthogonal bands (e.g. sinc functions) Sample at ... Rb/K blocks/s. Rb/b symbols/s. Rb/b symbols/s (N C) symbols/block. RS symbols/s. freq ...

Overlapping, but orthogonal bands (e.g. sinc functions) Sample at ... Rb/K blocks/s. Rb/b symbols/s. Rb/b symbols/s (N C) symbols/block. RS symbols/s. freq ...

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Diversity and Error Compensation in OFDM Transceivers: Principles and Implementation PowerPoint PPT Presentation

Diversity and Error Compensation in OFDM Transceivers: Principles and Implementation - Fire Tom Wada Professor, Information Engineering, Univ. of the Ryukyus Chief Scientist at Magna Design Net, Inc wada@ie.u-ryukyu.ac.jp http://www.ie.u-ryukyu.ac.jp/~wada/

Fire Tom Wada Professor, Information Engineering, Univ. of the Ryukyus Chief Scientist at Magna Design Net, Inc wada@ie.u-ryukyu.ac.jp http://www.ie.u-ryukyu.ac.jp/~wada/

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Decision Feedback Equalization in OFDM with Long Delay Spreads PowerPoint PPT Presentation

Decision Feedback Equalization in OFDM with Long Delay Spreads - Decision Feedback Equalization in OFDM with Long Delay Spreads Zeeshan Qureshi Digital Video Broadcasting (DVB) Rapidly becoming world-wide standard for digital TV ...

Decision Feedback Equalization in OFDM with Long Delay Spreads Zeeshan Qureshi Digital Video Broadcasting (DVB) Rapidly becoming world-wide standard for digital TV ...

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Multi-band OFDM Physical Layer Proposal Update PowerPoint PPT Presentation

Multi-band OFDM Physical Layer Proposal Update - Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) ... Realtek Semiconductor Corp: T. Chou. RFDomus: A. Mantovani. SiWorks: R. Bertschmann ...

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) ... Realtek Semiconductor Corp: T. Chou. RFDomus: A. Mantovani. SiWorks: R. Bertschmann ...

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TTM of MB-OFDM Products PowerPoint PPT Presentation

TTM of MB-OFDM Products - Project: IEEE 802.15 Working Group for Wireless Personal Area ... huang@am.sony.com mark.fidler@hp.com ... confusion about which UWB device to buy ...

Project: IEEE 802.15 Working Group for Wireless Personal Area ... huang@am.sony.com mark.fidler@hp.com ... confusion about which UWB device to buy ...

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Multiuser OFDM with Adaptive Subcarrier, Bit and Power Allocation PowerPoint PPT Presentation

Multiuser OFDM with Adaptive Subcarrier, Bit and Power Allocation - H decrease = will increase the pr to become 1 to transmit data ... Digital Communication, Prokis, 4th edition. Wireless Communications, Rappaport,2nd edition ...

H decrease = will increase the pr to become 1 to transmit data ... Digital Communication, Prokis, 4th edition. Wireless Communications, Rappaport,2nd edition ...

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OFDM Physical Layer Fundamentals, Standards, PowerPoint PPT Presentation

OFDM Physical Layer Fundamentals, Standards, - Associate Professor of Electrical Engineering. Telecom and Computer Networks (TeNeT) Group ... IISc Program on Mathematical Engineering, Feb. 14, 2003. IEEE ...

Associate Professor of Electrical Engineering. Telecom and Computer Networks (TeNeT) Group ... IISc Program on Mathematical Engineering, Feb. 14, 2003. IEEE ...

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Introduction to OFDM and the IEEE 802.11a Standard PowerPoint PPT Presentation

Introduction to OFDM and the IEEE 802.11a Standard - Title: No Slide Title Last modified by: narayan Created Date: 1/21/2003 5:41:38 AM Document presentation format: On-screen Show Other titles: Times New Roman Tahoma ...

Title: No Slide Title Last modified by: narayan Created Date: 1/21/2003 5:41:38 AM Document presentation format: On-screen Show Other titles: Times New Roman Tahoma ...

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CDMA vs' OFDM in 4G PowerPoint PPT Presentation

CDMA vs' OFDM in 4G - Quality degrades as the number of users in a given cell increases ... multimedia support (real time audio, high speed data, HDTV video content, mobile ...

Quality degrades as the number of users in a given cell increases ... multimedia support (real time audio, high speed data, HDTV video content, mobile ...

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Background of OFDM and WLANs PowerPoint PPT Presentation

Background of OFDM and WLANs - Stochastic Processes and Random Variables. Discrete-Time Signal Processing ... Stochastic and random process. Discrete-time signals. Discrete Fourier Transform(DFT) ...

Stochastic Processes and Random Variables. Discrete-Time Signal Processing ... Stochastic and random process. Discrete-time signals. Discrete Fourier Transform(DFT) ...

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OFDM Transmission over Gaussian Channel PowerPoint PPT Presentation

OFDM Transmission over Gaussian Channel - OFDM Transmission over Gaussian Channel Gwo-Ruey Lee Outlines OFDM Transmission over Gaussian Channel Gaussian Distribution The AWGN Channel Model OFDM System ...

OFDM Transmission over Gaussian Channel Gwo-Ruey Lee Outlines OFDM Transmission over Gaussian Channel Gaussian Distribution The AWGN Channel Model OFDM System ...

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MB-OFDM Interference Impact to In-band QPSK transmissions PowerPoint PPT Presentation

MB-OFDM Interference Impact to In-band QPSK transmissions - ... Channelization DTV Simulation Model Excludes Reed-Solomon coding and interleaving Impossible to simulate error rates with RS coding Will probably ...

... Channelization DTV Simulation Model Excludes Reed-Solomon coding and interleaving Impossible to simulate error rates with RS coding Will probably ...

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Signal Processing for OFDM Communication Systems - Signal Processing for OFDM Communication Systems

Signal Processing for OFDM Communication Systems

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New preamble structure for AGC in a MIMO-OFDM system PowerPoint PPT Presentation

New preamble structure for AGC in a MIMO-OFDM system - New preamble structure for AGC in a MIMO-OFDM system Tsuguhide Aoki, Daisuke Takeda, Takahiro Kobayashi and Kazuaki Kawabata Corporate R&D center, TOSHIBA corporation

New preamble structure for AGC in a MIMO-OFDM system Tsuguhide Aoki, Daisuke Takeda, Takahiro Kobayashi and Kazuaki Kawabata Corporate R&D center, TOSHIBA corporation

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PAPR Reduction of OFDM by Unitary Transformations PowerPoint PPT Presentation

PAPR Reduction of OFDM by Unitary Transformations - PAPR Reduction of OFDM by Unitary Transformations Je Woo Kim TeleCIS Wireless, Inc. jewkim@telecis.com Contents Background for PAPR Reduction in OFDM Delta Frequency ...

PAPR Reduction of OFDM by Unitary Transformations Je Woo Kim TeleCIS Wireless, Inc. jewkim@telecis.com Contents Background for PAPR Reduction in OFDM Delta Frequency ...

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CFO Estimation with ICI Cancellation for OFDM Systems PowerPoint PPT Presentation

CFO Estimation with ICI Cancellation for OFDM Systems - Title: PowerPoint Presentation Last modified by: yrtsai Created Date: 1/1/1601 12:00:00 AM Document presentation format: Other titles

Title: PowerPoint Presentation Last modified by: yrtsai Created Date: 1/1/1601 12:00:00 AM Document presentation format: Other titles

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DSSS, ISI Equalization and OFDM PowerPoint PPT Presentation

DSSS, ISI Equalization and OFDM - none

none

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Power Spectral Density Approach to Optimal Lattice OFDM Design for Time-Frequency Dispersive Wireless Channels PowerPoint PPT Presentation

Power Spectral Density Approach to Optimal Lattice OFDM Design for Time-Frequency Dispersive Wireless Channels - Power Spectral Density Approach to Optimal Lattice OFDM Design for Time-Frequency Dispersive Wireless Channels Wireless Networks December 04,2003

Power Spectral Density Approach to Optimal Lattice OFDM Design for Time-Frequency Dispersive Wireless Channels Wireless Networks December 04,2003

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Usage of OFDM in a wideband fading channel PowerPoint PPT Presentation

Usage of OFDM in a wideband fading channel - Usage of OFDM in a wideband fading channel OFDM signal structure Subcarrier modulation and coding Signals in frequency and time domain Inter-carrier interference

Usage of OFDM in a wideband fading channel OFDM signal structure Subcarrier modulation and coding Signals in frequency and time domain Inter-carrier interference

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Long-Range Channel Prediction for Adaptive OFDM Systems PowerPoint PPT Presentation

Long-Range Channel Prediction for Adaptive OFDM Systems - Used an FIR Weiner prediction filter. Designed for flat-fading channels ... Future work: Adaptive prediction with Weiner smoothing ...

Used an FIR Weiner prediction filter. Designed for flat-fading channels ... Future work: Adaptive prediction with Weiner smoothing ...

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Adaptive Resource Allocation in Multiuser OFDM Systems PowerPoint PPT Presentation

Adaptive Resource Allocation in Multiuser OFDM Systems - Y1:Y2:...:YK. For k = 1 to K. Find n satisfying h(k,n) h(k,j) for all j e A ... Find k satisfying Rk/Yk = Ri/Yi for all I, 1 =i =K ...

Y1:Y2:...:YK. For k = 1 to K. Find n satisfying h(k,n) h(k,j) for all j e A ... Find k satisfying Rk/Yk = Ri/Yi for all I, 1 =i =K ...

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12- OFDM with Multiple Antennas PowerPoint PPT Presentation

12- OFDM with Multiple Antennas - 12- OFDM with Multiple Antennas * * * * * * * * * * * * * * Multiple Antenna Systems (MIMO) TX RX Transmit Antennas Receive Antennas Different paths Two cases: Array ...

12- OFDM with Multiple Antennas * * * * * * * * * * * * * * Multiple Antenna Systems (MIMO) TX RX Transmit Antennas Receive Antennas Different paths Two cases: Array ...

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Ofdm PowerPoint PPT Presentations