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 A Data-Aided Phase Rotation Estimation Scheme for Recovering Channel Amplitude Asymmetry in SFLC-OFDM Systems 


Vol. 49,  No. 11, pp. 1534-1546, Nov.  2024
10.7840/kics.2024.49.11.1534


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  Abstract

This study proposes a technique for estimating phase rotation offset of received symbols in Space Frequency Line Code–Orthogonal Frequency Division Duplexing (SFLC-OFDM) systems under asymmetric channel amplitude conditions between the uplink and downlink. SFLC-OFDM assumes symmetry between the uplink and downlink channels and performs encoding based on estimated uplink channel information. However, due to channel amplitude asymmetry, distortion occurs in the phase of received symbols, leading to a rotation of the phase of decoding symbols derived from the operation of received symbols, thus deteriorating the decoding performance. In this study, we present a method for estimating errors causing phase rotation through mathematical analysis. Additionally, a testbed utilizing software modem-based Universal Software Radio Peripheral (USRP) is constructed to experimentally verify the estimation of phase rotation errors using the proposed technique.

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  Cite this article

[IEEE Style]

S. Lee and J. Kim, "A Data-Aided Phase Rotation Estimation Scheme for Recovering Channel Amplitude Asymmetry in SFLC-OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 49, no. 11, pp. 1534-1546, 2024. DOI: 10.7840/kics.2024.49.11.1534.

[ACM Style]

Song-Min Lee and Juyeop Kim. 2024. A Data-Aided Phase Rotation Estimation Scheme for Recovering Channel Amplitude Asymmetry in SFLC-OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 49, 11, (2024), 1534-1546. DOI: 10.7840/kics.2024.49.11.1534.

[KICS Style]

Song-Min Lee and Juyeop Kim, "A Data-Aided Phase Rotation Estimation Scheme for Recovering Channel Amplitude Asymmetry in SFLC-OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 49, no. 11, pp. 1534-1546, 11. 2024. (https://doi.org/10.7840/kics.2024.49.11.1534)
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pISSN : 1226 - 4717
eISSN : 2287 - 3880