'Frequency hopping' diaporamas de présentation

Mobile Systems

Mobile Systems. The IEEE 802.11 WLAN Part II. Ver. 1.1. Synchronization and Frequency Hopping. Synchronzation: The process of the stations in a BSS (Basic Service Set) get- ting in step with each other, for reliable communication.

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Mobile Networks Module A (Part A2) Introduction Prof. JP Hubaux mobnet.epfl.ch

Mobile Networks Module A (Part A2) Introduction Prof. JP Hubaux http://mobnet.epfl.ch. Modulation and demodulation (reminder). analog baseband signal. digital data. digital modulation. analog modulation. radio transmitter. 101101001. radio carrier. analog baseband signal.

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Chapter 3

Chapter 3. Frequency-Hopping Systems. 3.1 Concepts and Characteristics. Frequency hopping The periodic changing of the carrier frequency of a transmitted signal. Hopset The set of M possible carrier frequencies Frequency hopping pattern The sequence of carrier frequencies .

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Typical Wireless Personal Area Networks: Bluetooth and ZigBee

Typical Wireless Personal Area Networks: Bluetooth and ZigBee. Fundamentals Fundamentals of short/medium range wireless communication 1 digital transmission systems fading channels diversity Fundamentals of short/medium range wireless communication 2 MIMO wireless space-time processing

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DIGITAL SPREAD SPECTRUM SYSTEMS

DIGITAL SPREAD SPECTRUM SYSTEMS. ENG-737. Wright State University James P. Stephens. FREQUENCY HOPPING. Data is sent during the dwell time of a frequency hopping radio Modulation is typically Binary FSK The frequency shift is small compared to the frequency hop center frequency channels

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Module-3 : Transmission Lecture-9 (18/5/00)

Module-3 : Transmission Lecture-9 (18/5/00). Marc Moonen Dept. E.E./ESAT, K.U.Leuven marc.moonen@esat.kuleuven.ac.be www.esat.kuleuven.ac.be/sista/~moonen/. Lecture 9 : CDMA -Overview. Multiple Access Techniques TDMA FDMA

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Multiuser Systems (Ch. 14) EEE-534 Wireless Communications Spring 2011 Bilkent University

Multiuser Systems (Ch. 14) EEE-534 Wireless Communications Spring 2011 Bilkent University Department of Electrical and Electronics Engineering. Multiuser Systems. In multiuser systems , system resources should be divided among multiple users.

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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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Radio Access

Radio Access. Johan Montelius jm@ sics .se. Shannon. C = W x log 2 (1 + S/N). The capacity [C] in bits/s is directly proportional to the available bandwidth [W] and log 2 proportional to the signal to noise ratio [S/N]. bandwidth & power. Attenuation in open space.

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Bluetooth Considerations

Bluetooth Considerations. Mobile Computing. Some slides from MobEduNet. Electronic devices connect to one another in a variety of ways:. Data cable and a docking cradle connect a personal digital assistant (PDA) or a cellular phone to a computer

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Welcome

If there were no errors, the receiving radio sends an acknowledgement packet (ACK) to the ... Each radio frequency packet you send over a Locus radio is encrypted, ...

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Chapter 13. Spread Spectrum

Chapter 13. Spread Spectrum. Park Dong-Hyun Department of Information and Communications Engineering The Graduate School of Sejong University. Contents. Spread Spectrum Principles Direct Sequence Spread Spectrum (DSSS) DSSS System Model Spreading Codes for ISI Rejection Synchronization

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Wireless Networks - MAC layer

Wireless Networks - MAC layer. - Bluetooth. What is Bluetooth?. Cable replacement technology primarily

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Wireless Data Networking

Ohio Highway Patrol. Wireless Data Networking. Raj Jain The Ohio State University Columbus, OH 43210-1277 Jain@ACM.Org. These slides are available at http://www.cse.ohio-state.edu/~jain/cis777-00/. Overview. Spread Spectrum Wireless wide area networks: CDPD and Metricom

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Module contents

Module contents. Technologies overview Spread Spectrum Direct Sequence Frequency Hopping Modulation DBPSK/DQPSK CCK. OSI Reference Model: Phy. Network Oper. System Network Layer Guarantees delivery data Drivers LLC Layer send/receive data LAN Controller MAC Layer

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An Analytical Study of Wireless Error Models for Bluetooth Networks

An Analytical Study of Wireless Error Models for Bluetooth Networks. Hao-Hsiang Hung and Ling-Jyh Chen Academia Sinica. Motivation and Goal. packet loss caused by burst errors limits wireless network throughput co-channel interference dominates a great part

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Christopher Greco, Wesley Kunzler, Koy Rehme, Ryan Ruan

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DIGITAL SPREAD SPECTRUM SYSTEMS

DIGITAL SPREAD SPECTRUM SYSTEMS. ENG-737. Wright State University James P. Stephens Lecture Notes. WHAT WILL YOU LEARN ?. Learn the definition of SS Understand the reason for using SS Learn to distinguish between various modulation types

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VHF-90M Military VHF-Transciever

VHF-90M Military VHF-Transciever. Analog Fixed Frequency Secure Digital Fixed Frequency Secure Digital Frequency Hopping. VHF-90M Low Band Digital VHF. Full Military build specification (810F) Compact & lightweight (1kg Transceiver) 5W Output Power 30-88MHz Frequency Range

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Inquiry and Paging for Bluetooth Piconet and Scatternet Formation in NS

Inquiry and Paging for Bluetooth Piconet and Scatternet Formation in NS. Denis Perelyubskiy Vadim Olshansky Vitaliy Dykhne. Project Overview. Implementation of Bluetooth Inquiry and Paging procedures in ns-2 network simulator based on Bluetooth Standard version 1.0b/1.1. Project Goals.

259 views • 12 slides