'Ofdm' presentation slideshows

Wireless Local Networks are Emerging

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An Introduction to Multi-band OFDM Physical Layer Proposal for IEEE 802.15 Task Group 3a

An Introduction to Multi-band OFDM Physical Layer Proposal for IEEE 802.15 Task Group 3a. Presenter: Keng-Hsien Lin Advisor: Prof. Tzi-Dar Chiueh Date: Feb 16, 2004. Outline. Motivation MBOA History Overview Review of Some OFDM Principles PHY Specification of Multi-band OFDM Proposal

762 views • 56 slides

Wireless Radio Technologies

Wireless Radio Technologies. Learning Objectives. Upon successful completion of this lesson, you will be able to:. State the FCC regulation 15.247 regarding the synchronization of frequencies. Define Direct Sequence Spread Spectrum (DSSS), and its uses.

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??? OFDM ?????? ?????????

??? OFDM ?????? ?????????. ????:??? ? ?:???. A Robust Inner Receiver Structure Design for OFDM Systems. Outline. OFDM system block diagram OFDM baseband signal model Inner receiver structure Channel estimation LMS algorithm Selection of ? Pilot-based phase estimator

1.01k views • 43 slides

Salient features

Salient features. BASIC IDEA : Channel bandwidth is divided into multiple subchannels to reduce ISI and frequency-selective fading. Multicarrier transmission : Subcarriers are orthogonal each other in frequency domain. Time-domain spreading:

903 views • 40 slides

OFDM Platform Services, Technology, Architecture and Concepts

OFDM Platform Services, Technology, Architecture and Concepts. Marianna Goldhammer Director, Product Management. Provider view.

535 views • 40 slides

Agile Radio Systems and A National Radio Networking Research Testbed

Agile Radio Systems and A National Radio Networking Research Testbed. Gary J. Minden Joseph B. Evans Electrical Engineering & Computer Science Director, Networking & Distributed Systems Laboratory Information & Telecommunication Technology Center. Agile Wireless Actions. Agile Radios

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SISTEMI DI RADIOCOMUNICAZIONE

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Efficient Collaborative (Viral) Communication in OFDM Based WLANs

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OFDM in the 2.4 GHz Band

OFDM in the 2.4 GHz Band. Jan Boer, Lucent Technologies. Why OFDM in 2.4 GHz. Standard is developing fast: 2 Mbit/s in 1997 11 Mbit/s in 1999 PAR for >20 Mbit/s in 2000 What is next; can we go higher? Yes; OFDM as specified in 802.11a can go up to 54 Mbit/s also in the 2.4 GHz band. How?.

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [ Results of Interference Testing of MB-OFDM, DS, and Gated and Non-Gated Noise ] Date Submitted: [11 Nov ember 2003 ] Source: [John McCorkle] Company [XtremeSpectrum]

178 views • 13 slides

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 chip sequence, that is *orthogonal* with other chip sequences. Simple Examples of CMDA. A: (-1 -1 -1 +1 +1 -1 +1 +1 )

741 views • 13 slides

Cooperative STBC-OFDM Transmissions with Imperfect Synchronization in Time and Frequency

Cooperative STBC-OFDM Transmissions with Imperfect Synchronization in Time and Frequency. Fan Ng and Xiaohua(Edward) Li Department of Electrical and Computer Engineering State University of New York at Binghamton {fngnone1,xli}@binghamton.edu h ttp://ucesp.ws.binghamton.edu/~xli.

301 views • 13 slides

Wireless. Broadband. Mobility. Towards Freedom in Universal Broadband Mobility

Wireless. Broadband. Mobility. Towards Freedom in Universal Broadband Mobility. Dr. Hatim Zaghloul Executive Chairman. Corporate Profile. Wi-LAN is revolutionizing the broadband wireless marketplace with: its W-OFDM technology (adopted by Wi-Fi and WiMAX)

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Dr. Hatim Zaghloul Chairman and CEO

323 views • 11 slides

Multicarrier Modulation

Multicarrier Modulation. Outline. Introduction to ISI Countermeasures Multicarrier Modulation Overlapping Substreams Fading across subcarriers OFDM FFT Implementation DFT analysis TX and RX design OFDM and OFDM-MIMO Design Issues. ISI Countermeasures. Equalization

2.02k views • 10 slides

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Symbol Detection in CDMA-OFDM Co-existence

Symbol Detection in CDMA-OFDM Co-existence. G V V Sharma (06407010) Aswani Kumar Ravi (06307R13) Nagaraj T (06307040) URL: www.ee.iitb.ac.in/student/~aswanikumar. Problem Statement. One user transmits the symbol b using CDMA (spreading

218 views • 3 slides