MIMO processing for WiMAX in challenging radio environment

Ilkka Harjula, Paola Cardamone, Marcos Katz, Federico Albiero

Research output: Contribution to conferenceConference articleScientific

Abstract

Wireless communication systems based on multicarrier techniques such as orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) are capable of offering reliable high data-rate transmission by transferring a frequency selective radio channel into a series of parallel frequency-flat channels. This work focuses on the systems based on the IEEE 802.16-2005 standard applying OFDMA technique for both uplink and downlink transmission. While this standard is mainly intended for metropolitan and local area networks, the target environment for these systems lays in the urban and rural areas. In this paper, the extension of these systems to isolated research networks located in remote mountainous areas is studied from the physical layer perspective. Firstly, the channel modelling for mountainous environments is discussed and a novel channel model extension for the WINNER channel model is presented. Secondly, multiple-input multiple-output (MIMO) transmission techniques, such as space-time codes, spatial multiplexing and beamforming, are studied to enhance the system performance in this demanding radio environment. The simulation results indicate that the mountainous environment significantly lengthens the channel impulse response and also affects to the direction-of-arrival of the signal. The simulation results also demonstrate that instead of frequency-flat processing, frequency dependant beamforming techniques are preferred to cope with the distortion caused to the signal by the demanding channel model.
Original languageEnglish
Publication statusPublished - 2008
MoE publication typeNot Eligible
EventICT Mobile and Wireless Communications Summit 2008 - Stockholm, Sweden
Duration: 10 Jun 200812 Jun 2008

Conference

ConferenceICT Mobile and Wireless Communications Summit 2008
CountrySweden
CityStockholm
Period10/06/0812/06/08

Fingerprint

Frequency division multiple access
Beamforming
Processing
Metropolitan area networks
Space time codes
Direction of arrival
Impulse response
Multiplexing
Local area networks
Orthogonal frequency division multiplexing
Communication systems

Keywords

  • MIMO
  • channel modelling
  • beamforming
  • EVD
  • OFDM
  • OFDMA

Cite this

Harjula, I., Cardamone, P., Katz, M., & Albiero, F. (2008). MIMO processing for WiMAX in challenging radio environment. Paper presented at ICT Mobile and Wireless Communications Summit 2008, Stockholm, Sweden.
Harjula, Ilkka ; Cardamone, Paola ; Katz, Marcos ; Albiero, Federico. / MIMO processing for WiMAX in challenging radio environment. Paper presented at ICT Mobile and Wireless Communications Summit 2008, Stockholm, Sweden.
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abstract = "Wireless communication systems based on multicarrier techniques such as orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) are capable of offering reliable high data-rate transmission by transferring a frequency selective radio channel into a series of parallel frequency-flat channels. This work focuses on the systems based on the IEEE 802.16-2005 standard applying OFDMA technique for both uplink and downlink transmission. While this standard is mainly intended for metropolitan and local area networks, the target environment for these systems lays in the urban and rural areas. In this paper, the extension of these systems to isolated research networks located in remote mountainous areas is studied from the physical layer perspective. Firstly, the channel modelling for mountainous environments is discussed and a novel channel model extension for the WINNER channel model is presented. Secondly, multiple-input multiple-output (MIMO) transmission techniques, such as space-time codes, spatial multiplexing and beamforming, are studied to enhance the system performance in this demanding radio environment. The simulation results indicate that the mountainous environment significantly lengthens the channel impulse response and also affects to the direction-of-arrival of the signal. The simulation results also demonstrate that instead of frequency-flat processing, frequency dependant beamforming techniques are preferred to cope with the distortion caused to the signal by the demanding channel model.",
keywords = "MIMO, channel modelling, beamforming, EVD, OFDM, OFDMA",
author = "Ilkka Harjula and Paola Cardamone and Marcos Katz and Federico Albiero",
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Harjula, I, Cardamone, P, Katz, M & Albiero, F 2008, 'MIMO processing for WiMAX in challenging radio environment', Paper presented at ICT Mobile and Wireless Communications Summit 2008, Stockholm, Sweden, 10/06/08 - 12/06/08.

MIMO processing for WiMAX in challenging radio environment. / Harjula, Ilkka; Cardamone, Paola; Katz, Marcos; Albiero, Federico.

2008. Paper presented at ICT Mobile and Wireless Communications Summit 2008, Stockholm, Sweden.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - MIMO processing for WiMAX in challenging radio environment

AU - Harjula, Ilkka

AU - Cardamone, Paola

AU - Katz, Marcos

AU - Albiero, Federico

N1 - Project code: 6139

PY - 2008

Y1 - 2008

N2 - Wireless communication systems based on multicarrier techniques such as orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) are capable of offering reliable high data-rate transmission by transferring a frequency selective radio channel into a series of parallel frequency-flat channels. This work focuses on the systems based on the IEEE 802.16-2005 standard applying OFDMA technique for both uplink and downlink transmission. While this standard is mainly intended for metropolitan and local area networks, the target environment for these systems lays in the urban and rural areas. In this paper, the extension of these systems to isolated research networks located in remote mountainous areas is studied from the physical layer perspective. Firstly, the channel modelling for mountainous environments is discussed and a novel channel model extension for the WINNER channel model is presented. Secondly, multiple-input multiple-output (MIMO) transmission techniques, such as space-time codes, spatial multiplexing and beamforming, are studied to enhance the system performance in this demanding radio environment. The simulation results indicate that the mountainous environment significantly lengthens the channel impulse response and also affects to the direction-of-arrival of the signal. The simulation results also demonstrate that instead of frequency-flat processing, frequency dependant beamforming techniques are preferred to cope with the distortion caused to the signal by the demanding channel model.

AB - Wireless communication systems based on multicarrier techniques such as orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) are capable of offering reliable high data-rate transmission by transferring a frequency selective radio channel into a series of parallel frequency-flat channels. This work focuses on the systems based on the IEEE 802.16-2005 standard applying OFDMA technique for both uplink and downlink transmission. While this standard is mainly intended for metropolitan and local area networks, the target environment for these systems lays in the urban and rural areas. In this paper, the extension of these systems to isolated research networks located in remote mountainous areas is studied from the physical layer perspective. Firstly, the channel modelling for mountainous environments is discussed and a novel channel model extension for the WINNER channel model is presented. Secondly, multiple-input multiple-output (MIMO) transmission techniques, such as space-time codes, spatial multiplexing and beamforming, are studied to enhance the system performance in this demanding radio environment. The simulation results indicate that the mountainous environment significantly lengthens the channel impulse response and also affects to the direction-of-arrival of the signal. The simulation results also demonstrate that instead of frequency-flat processing, frequency dependant beamforming techniques are preferred to cope with the distortion caused to the signal by the demanding channel model.

KW - MIMO

KW - channel modelling

KW - beamforming

KW - EVD

KW - OFDM

KW - OFDMA

M3 - Conference article

ER -

Harjula I, Cardamone P, Katz M, Albiero F. MIMO processing for WiMAX in challenging radio environment. 2008. Paper presented at ICT Mobile and Wireless Communications Summit 2008, Stockholm, Sweden.