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- W1995662016 abstract "In this paper, an enhanced initial ranging algorithm for large-cell coverage fixed wireless communication system is proposed. In typical wireless communication system such as WiBro, because a round-trip delay between a transmitter and a receiver is within one OFDM (Orthogonal Frequency Division Multiplexing) symbol duration, a frequency-domain differential correlation method is generally used. However, the conventional method cannot be applied due to an increase of a maximum time delay in large-cell system. In case of an accumulative differential method, estimation errors can occur because of frequent sign transitions. In this paper, therefore, we propose an algorithm which can estimate a total timing offset in a ranging channel structure for 15 km cell. The proposed method can improve performance by sign comparison based sign error correction rule between the estimated values and using a weighting scheme based on channel correlation, the number of accumulations, and the noise reduction effect in normalization process. Also, it can estimate the integer timing offset of symbol duration by comparing peak-powers after compensating for the fractional timing offset of symbol duration." @default.
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- W1995662016 date "2012-07-31" @default.
- W1995662016 modified "2023-09-27" @default.
- W1995662016 title "Design of Uplink Initial Ranging Algorithm for Large-Cell Coverage Fixed Wireless Communication System" @default.
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- W1995662016 doi "https://doi.org/10.7840/kics.2012.37.7a.569" @default.
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