Signal design for multipath fading channels-Doppler and ISI barriers

Aarne Mämmelä

doi:10.1109/VETECS.2001.944575

Signal design for multipath fading channels-Doppler and ISI barriers

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

Signal design for digital communications in linear multipath fading channels is discussed. We define two extremes for the symbol rate in single-carrier systems, i.e., the Doppler barrier and the intersymbol interference (ISI) barrier and we note that it is difficult to go beyond these two barriers. The Doppler barrier is roughly equal to the Doppler spread of the channel. The ISI barrier is roughly equal to the inverse of the multipath spread of the channel. We use the time-frequency duality and show, that above the ISI barrier it is advantageous to use frequency multiplexed signals like orthogonal frequency division multiplexing (OFDM) signals, and below the Doppler barrier it is advantageous to use the corresponding time-multiplexed signals. An important parameter defining the measurability of the channel is the spread factor or the product of the Doppler spread and the multipath spread. Communications in overspread channels in which the spread factor is larger than unity is also discussed. All the results should be useful for system designers.

Original language	English
Title of host publication	IEEE VTS 53rd Vehicular Technology Conference, Spring 2001
Publisher	IEEE Institute of Electrical and Electronic Engineers
ISBN (Print)	978-0-7803-6728-9
DOIs	https://doi.org/10.1109/VETECS.2001.944575
Publication status	Published - 7 Aug 2001
MoE publication type	A4 Article in a conference publication
Event	53rd Vehicular Technology Conference, Spring 2001, VTC 2001 Spring: Connecting the mobile world - Rhodes, Greece Duration: 6 May 2001 → 9 May 2001 Conference number: 53

Publication series

Series	IEEE Vehicular Technology Conference Proceedings
Volume	53
ISSN	1550-2252

Conference

Conference	53rd Vehicular Technology Conference, Spring 2001, VTC 2001 Spring
Country/Territory	Greece
City	Rhodes
Period	6/05/01 → 9/05/01

Keywords

signal design
fading
Intersymbol interference
OFDM
spread spectrum communication
terminology
digital communication
aircraft
transmitters

Access to Document

10.1109/VETECS.2001.944575

Cite this

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title = "Signal design for multipath fading channels-Doppler and ISI barriers",

abstract = "Signal design for digital communications in linear multipath fading channels is discussed. We define two extremes for the symbol rate in single-carrier systems, i.e., the Doppler barrier and the intersymbol interference (ISI) barrier and we note that it is difficult to go beyond these two barriers. The Doppler barrier is roughly equal to the Doppler spread of the channel. The ISI barrier is roughly equal to the inverse of the multipath spread of the channel. We use the time-frequency duality and show, that above the ISI barrier it is advantageous to use frequency multiplexed signals like orthogonal frequency division multiplexing (OFDM) signals, and below the Doppler barrier it is advantageous to use the corresponding time-multiplexed signals. An important parameter defining the measurability of the channel is the spread factor or the product of the Doppler spread and the multipath spread. Communications in overspread channels in which the spread factor is larger than unity is also discussed. All the results should be useful for system designers.",

keywords = "signal design, fading, Intersymbol interference, OFDM, spread spectrum communication, terminology, digital communication, aircraft, transmitters",

author = "Aarne M{\"a}mmel{\"a}",

year = "2001",

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doi = "10.1109/VETECS.2001.944575",

language = "English",

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series = "IEEE Vehicular Technology Conference Proceedings",

publisher = "IEEE Institute of Electrical and Electronic Engineers",

booktitle = "IEEE VTS 53rd Vehicular Technology Conference, Spring 2001",

address = "United States",

note = "53rd Vehicular Technology Conference, Spring 2001, VTC 2001 Spring : Connecting the mobile world ; Conference date: 06-05-2001 Through 09-05-2001",

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Mämmelä, A 2001, Signal design for multipath fading channels-Doppler and ISI barriers. in IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. IEEE Institute of Electrical and Electronic Engineers, IEEE Vehicular Technology Conference Proceedings, vol. 53, 53rd Vehicular Technology Conference, Spring 2001, VTC 2001 Spring, Rhodes, Greece, 6/05/01. https://doi.org/10.1109/VETECS.2001.944575

Signal design for multipath fading channels-Doppler and ISI barriers. / Mämmelä, Aarne.
IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. IEEE Institute of Electrical and Electronic Engineers, 2001. (IEEE Vehicular Technology Conference Proceedings, Vol. 53).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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N2 - Signal design for digital communications in linear multipath fading channels is discussed. We define two extremes for the symbol rate in single-carrier systems, i.e., the Doppler barrier and the intersymbol interference (ISI) barrier and we note that it is difficult to go beyond these two barriers. The Doppler barrier is roughly equal to the Doppler spread of the channel. The ISI barrier is roughly equal to the inverse of the multipath spread of the channel. We use the time-frequency duality and show, that above the ISI barrier it is advantageous to use frequency multiplexed signals like orthogonal frequency division multiplexing (OFDM) signals, and below the Doppler barrier it is advantageous to use the corresponding time-multiplexed signals. An important parameter defining the measurability of the channel is the spread factor or the product of the Doppler spread and the multipath spread. Communications in overspread channels in which the spread factor is larger than unity is also discussed. All the results should be useful for system designers.

AB - Signal design for digital communications in linear multipath fading channels is discussed. We define two extremes for the symbol rate in single-carrier systems, i.e., the Doppler barrier and the intersymbol interference (ISI) barrier and we note that it is difficult to go beyond these two barriers. The Doppler barrier is roughly equal to the Doppler spread of the channel. The ISI barrier is roughly equal to the inverse of the multipath spread of the channel. We use the time-frequency duality and show, that above the ISI barrier it is advantageous to use frequency multiplexed signals like orthogonal frequency division multiplexing (OFDM) signals, and below the Doppler barrier it is advantageous to use the corresponding time-multiplexed signals. An important parameter defining the measurability of the channel is the spread factor or the product of the Doppler spread and the multipath spread. Communications in overspread channels in which the spread factor is larger than unity is also discussed. All the results should be useful for system designers.

KW - signal design

KW - fading

KW - Intersymbol interference

KW - OFDM

KW - spread spectrum communication

KW - terminology

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KW - aircraft

KW - transmitters

U2 - 10.1109/VETECS.2001.944575

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PB - IEEE Institute of Electrical and Electronic Engineers

T2 - 53rd Vehicular Technology Conference, Spring 2001, VTC 2001 Spring

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ER -

Signal design for multipath fading channels-Doppler and ISI barriers

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