Interference free decision feedback channel estimation technique for M -ary orthogonal DS/CDMA systems

Suk Hyon Yoonk; Dae Ki Hong; Daesik Hong; Chang Eon Kang

doi:10.1109/ICC.2001.937162

Interference free decision feedback channel estimation technique for M -ary orthogonal DS/CDMA systems

Suk Hyon Yoonk, Dae Ki Hong, Daesik Hong, Chang Eon Kang

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We consider interference free decision feedback channel estimation (DFCE) for M-ary orthogonal modulation in direct sequence/code division multiple access (DS/CDMA) systems. The proposed DFCE uses the maximum combiner output in a RAKE receiver as decision feedback information, enabling M-ary orthogonal signals to be demodulated coherently and a RAKE receiver to use a maximal ratio combining (MRC) scheme. Under multiuser environments, a multistage parallel interference cancellation (PIC) scheme is combined with the DFCE in order to cancel the interference. Accurate knowledge of the channel coefficient estimated by the proposed DFCE is used to regenerate the signal of each user for the multistage PIC scheme. According to the results of our simulations, the performance of coherent demodulation using the proposed system is significantly improved in comparison with conventional noncoherent demodulation.

Original language	English
Article number	26
Pages (from-to)	1456-1460
Number of pages	5
Journal	IEEE International Conference on Communications
Volume	5
DOIs	https://doi.org/10.1109/ICC.2001.937162
Publication status	Published - 2001

All Science Journal Classification (ASJC) codes

Computer Networks and Communications
Electrical and Electronic Engineering

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10.1109/ICC.2001.937162

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title = "Interference free decision feedback channel estimation technique for M -ary orthogonal DS/CDMA systems",

abstract = "We consider interference free decision feedback channel estimation (DFCE) for M-ary orthogonal modulation in direct sequence/code division multiple access (DS/CDMA) systems. The proposed DFCE uses the maximum combiner output in a RAKE receiver as decision feedback information, enabling M-ary orthogonal signals to be demodulated coherently and a RAKE receiver to use a maximal ratio combining (MRC) scheme. Under multiuser environments, a multistage parallel interference cancellation (PIC) scheme is combined with the DFCE in order to cancel the interference. Accurate knowledge of the channel coefficient estimated by the proposed DFCE is used to regenerate the signal of each user for the multistage PIC scheme. According to the results of our simulations, the performance of coherent demodulation using the proposed system is significantly improved in comparison with conventional noncoherent demodulation.",

author = "Yoonk, {Suk Hyon} and Hong, {Dae Ki} and Daesik Hong and Kang, {Chang Eon}",

year = "2001",

doi = "10.1109/ICC.2001.937162",

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AU - Yoonk, Suk Hyon

AU - Hong, Dae Ki

AU - Hong, Daesik

AU - Kang, Chang Eon

PY - 2001

Y1 - 2001

N2 - We consider interference free decision feedback channel estimation (DFCE) for M-ary orthogonal modulation in direct sequence/code division multiple access (DS/CDMA) systems. The proposed DFCE uses the maximum combiner output in a RAKE receiver as decision feedback information, enabling M-ary orthogonal signals to be demodulated coherently and a RAKE receiver to use a maximal ratio combining (MRC) scheme. Under multiuser environments, a multistage parallel interference cancellation (PIC) scheme is combined with the DFCE in order to cancel the interference. Accurate knowledge of the channel coefficient estimated by the proposed DFCE is used to regenerate the signal of each user for the multistage PIC scheme. According to the results of our simulations, the performance of coherent demodulation using the proposed system is significantly improved in comparison with conventional noncoherent demodulation.

AB - We consider interference free decision feedback channel estimation (DFCE) for M-ary orthogonal modulation in direct sequence/code division multiple access (DS/CDMA) systems. The proposed DFCE uses the maximum combiner output in a RAKE receiver as decision feedback information, enabling M-ary orthogonal signals to be demodulated coherently and a RAKE receiver to use a maximal ratio combining (MRC) scheme. Under multiuser environments, a multistage parallel interference cancellation (PIC) scheme is combined with the DFCE in order to cancel the interference. Accurate knowledge of the channel coefficient estimated by the proposed DFCE is used to regenerate the signal of each user for the multistage PIC scheme. According to the results of our simulations, the performance of coherent demodulation using the proposed system is significantly improved in comparison with conventional noncoherent demodulation.

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Interference free decision feedback channel estimation technique for M -ary orthogonal DS/CDMA systems

Abstract

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