Channel Optimized Predistortion in Self-Heterodyne Direct Conversion Architecture for OFDM Systems

Jun-Seok YANG; Jong-Ho LEE; Seong-Cheol KIM

doi:10.1093/ietcom/e90-b.6.1400

Channel Optimized Predistortion in Self-Heterodyne Direct Conversion Architecture for OFDM Systems

Jun-Seok YANG, Jong-Ho LEE, Seong-Cheol KIM

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This paper presents a novel technique to compensate intermodulation distortion of a self-heterodyne direct conversion OFDM system in multipath propagation environments. A self-heterodyne direct conversion system has an advantage that simple receivers can be built that are completely immune to any phase noise or frequency offset. This system, however, has a disadvantage that the nonlinear square-law detector at the receiver of the self-heterodyne direct conversion system gives rise to second order intermodulation distortion. In this study, channel estimation is performed using a training sequence and then the predistortion coefficients with regard to estimated channel parameters are derived to compensate the receiver nonlinearity. Transmit power distribution is employed to overcome multipath fading channels as well. Computer simulation demonstrates that the proposed approach improves the BER performance of the self-heterodyne direct conversion OFDM system in a multipath fading channel. This scheme gives advantage to multi-carrier systems that are much more sensitive to frequency and phase error than single-carrier systems.

Publication: IEICE TRANSACTIONS on Communications Vol.E90-B No.6 pp.1400-1406

Publication Date: 2007/06/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e90-b.6.1400

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

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Jun-Seok YANG, Jong-Ho LEE, Seong-Cheol KIM, "Channel Optimized Predistortion in Self-Heterodyne Direct Conversion Architecture for OFDM Systems" in IEICE TRANSACTIONS on Communications, vol. E90-B, no. 6, pp. 1400-1406, June 2007, doi: 10.1093/ietcom/e90-b.6.1400.
Abstract: This paper presents a novel technique to compensate intermodulation distortion of a self-heterodyne direct conversion OFDM system in multipath propagation environments. A self-heterodyne direct conversion system has an advantage that simple receivers can be built that are completely immune to any phase noise or frequency offset. This system, however, has a disadvantage that the nonlinear square-law detector at the receiver of the self-heterodyne direct conversion system gives rise to second order intermodulation distortion. In this study, channel estimation is performed using a training sequence and then the predistortion coefficients with regard to estimated channel parameters are derived to compensate the receiver nonlinearity. Transmit power distribution is employed to overcome multipath fading channels as well. Computer simulation demonstrates that the proposed approach improves the BER performance of the self-heterodyne direct conversion OFDM system in a multipath fading channel. This scheme gives advantage to multi-carrier systems that are much more sensitive to frequency and phase error than single-carrier systems.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.6.1400/_p

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@ARTICLE{e90-b_6_1400,
author={Jun-Seok YANG, Jong-Ho LEE, Seong-Cheol KIM, },
journal={IEICE TRANSACTIONS on Communications},
title={Channel Optimized Predistortion in Self-Heterodyne Direct Conversion Architecture for OFDM Systems},
year={2007},
volume={E90-B},
number={6},
pages={1400-1406},
abstract={This paper presents a novel technique to compensate intermodulation distortion of a self-heterodyne direct conversion OFDM system in multipath propagation environments. A self-heterodyne direct conversion system has an advantage that simple receivers can be built that are completely immune to any phase noise or frequency offset. This system, however, has a disadvantage that the nonlinear square-law detector at the receiver of the self-heterodyne direct conversion system gives rise to second order intermodulation distortion. In this study, channel estimation is performed using a training sequence and then the predistortion coefficients with regard to estimated channel parameters are derived to compensate the receiver nonlinearity. Transmit power distribution is employed to overcome multipath fading channels as well. Computer simulation demonstrates that the proposed approach improves the BER performance of the self-heterodyne direct conversion OFDM system in a multipath fading channel. This scheme gives advantage to multi-carrier systems that are much more sensitive to frequency and phase error than single-carrier systems.},
keywords={},
doi={10.1093/ietcom/e90-b.6.1400},
ISSN={1745-1345},
month={June},}

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TY - JOUR
TI - Channel Optimized Predistortion in Self-Heterodyne Direct Conversion Architecture for OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 1400
EP - 1406
AU - Jun-Seok YANG
AU - Jong-Ho LEE
AU - Seong-Cheol KIM
PY - 2007
DO - 10.1093/ietcom/e90-b.6.1400
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2007
AB - This paper presents a novel technique to compensate intermodulation distortion of a self-heterodyne direct conversion OFDM system in multipath propagation environments. A self-heterodyne direct conversion system has an advantage that simple receivers can be built that are completely immune to any phase noise or frequency offset. This system, however, has a disadvantage that the nonlinear square-law detector at the receiver of the self-heterodyne direct conversion system gives rise to second order intermodulation distortion. In this study, channel estimation is performed using a training sequence and then the predistortion coefficients with regard to estimated channel parameters are derived to compensate the receiver nonlinearity. Transmit power distribution is employed to overcome multipath fading channels as well. Computer simulation demonstrates that the proposed approach improves the BER performance of the self-heterodyne direct conversion OFDM system in a multipath fading channel. This scheme gives advantage to multi-carrier systems that are much more sensitive to frequency and phase error than single-carrier systems.
ER -