Combined turbo equalization and decoding for frequency selective fading channels

L. Stankovic; P. Clarke; B. Honary

doi:10.1049/cp:20030445

Combined turbo equalization and decoding for frequency selective fading channels

L. Stankovic, P. Clarke, B. Honary

Electronic And Electrical Engineering

Research output: Contribution to conference › Paper

Abstract

RF sky wave transmissions undergo multipath fading due to propagation through the ionospheric layers. The HF channel is time varying and can be modeled by a tapped delay line of independent complex fading processes each exhibiting correlated fading characteristics specified in the ITU-R recommendation. A practical configuration for a turbo equalizer to combat the effects of intersymbol interference (ISI) in the HF channel, consisting of a soft decision feedback equalizer (SDFE), an interference canceller and a turbo decoder, all being SISO (soft in soft out) processes, is presented. The tap coefficients of the interference canceller filters are updated at each iteration with extrinsic information from the previous decoding operation

Original language	English
Pages	140-144
Number of pages	5
DOIs	https://doi.org/10.1049/cp:20030445
Publication status	Published - Jun 2003
Event	9th International Conference on HF Radio Systems and Techniques, 2003 - Bath, United Kingdom Duration: 23 Jun 2003 → 26 Jun 2003

Conference

Conference	9th International Conference on HF Radio Systems and Techniques, 2003
Country/Territory	United Kingdom
City	Bath
Period	23/06/03 → 26/06/03

Keywords

decision feedback equalisers
turbo codes
time-varying filters
time-varying channels
multipath channels
iterative decoding
ionospheric electromagnetic wave propagation
intersymbol interference
fading channels
interference suppression
delay lines
combined turbo equalization
decoding
frequency
selective fading

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10.1049/cp:20030445

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title = "Combined turbo equalization and decoding for frequency selective fading channels",

abstract = "RF sky wave transmissions undergo multipath fading due to propagation through the ionospheric layers. The HF channel is time varying and can be modeled by a tapped delay line of independent complex fading processes each exhibiting correlated fading characteristics specified in the ITU-R recommendation. A practical configuration for a turbo equalizer to combat the effects of intersymbol interference (ISI) in the HF channel, consisting of a soft decision feedback equalizer (SDFE), an interference canceller and a turbo decoder, all being SISO (soft in soft out) processes, is presented. The tap coefficients of the interference canceller filters are updated at each iteration with extrinsic information from the previous decoding operation",

keywords = "decision feedback equalisers , turbo codes , time-varying filters , time-varying channels , multipath channels , iterative decoding , ionospheric electromagnetic wave propagation , intersymbol interference, fading channels , interference suppression, delay lines , combined turbo equalization, decoding, frequency, selective fading",

author = "L. Stankovic and P. Clarke and B. Honary",

year = "2003",

month = jun,

doi = "10.1049/cp:20030445",

language = "English",

pages = "140--144",

note = "9th International Conference on HF Radio Systems and Techniques, 2003 ; Conference date: 23-06-2003 Through 26-06-2003",

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TY - CONF

T1 - Combined turbo equalization and decoding for frequency selective fading channels

AU - Stankovic, L.

AU - Clarke, P.

AU - Honary, B.

PY - 2003/6

Y1 - 2003/6

N2 - RF sky wave transmissions undergo multipath fading due to propagation through the ionospheric layers. The HF channel is time varying and can be modeled by a tapped delay line of independent complex fading processes each exhibiting correlated fading characteristics specified in the ITU-R recommendation. A practical configuration for a turbo equalizer to combat the effects of intersymbol interference (ISI) in the HF channel, consisting of a soft decision feedback equalizer (SDFE), an interference canceller and a turbo decoder, all being SISO (soft in soft out) processes, is presented. The tap coefficients of the interference canceller filters are updated at each iteration with extrinsic information from the previous decoding operation

AB - RF sky wave transmissions undergo multipath fading due to propagation through the ionospheric layers. The HF channel is time varying and can be modeled by a tapped delay line of independent complex fading processes each exhibiting correlated fading characteristics specified in the ITU-R recommendation. A practical configuration for a turbo equalizer to combat the effects of intersymbol interference (ISI) in the HF channel, consisting of a soft decision feedback equalizer (SDFE), an interference canceller and a turbo decoder, all being SISO (soft in soft out) processes, is presented. The tap coefficients of the interference canceller filters are updated at each iteration with extrinsic information from the previous decoding operation

KW - decision feedback equalisers

KW - turbo codes

KW - time-varying filters

KW - time-varying channels

KW - multipath channels

KW - iterative decoding

KW - ionospheric electromagnetic wave propagation

KW - intersymbol interference

KW - fading channels

KW - interference suppression

KW - delay lines

KW - combined turbo equalization

KW - decoding

KW - frequency

KW - selective fading

U2 - 10.1049/cp:20030445

DO - 10.1049/cp:20030445

M3 - Paper

SP - 140

EP - 144

T2 - 9th International Conference on HF Radio Systems and Techniques, 2003

Y2 - 23 June 2003 through 26 June 2003

ER -

Combined turbo equalization and decoding for frequency selective fading channels

Abstract

Conference

Keywords

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