A low-overhead interference canceller for high-mobility STBC-OFDM systems

Hsiao Yun Chen, Wei Kai Chang, Shyh-Jye Jou

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    1 Scopus citations

    Abstract

    This paper proposes a low-overhead space-time block code (STBC) interference canceller for high-mobility STBC-orthogonal frequency division multiplexing (STBC-OFDM) systems. The proposed STBC interference canceller combined with the two-stage channel estimator can be applied to wireless metropolitan area network (WMAN), like IEEE 802.16e system. At the vehicle speeds of 240 km/hr for 16 quadrature amplitude modulation (16 QAM), the bit error rate (BER)can be improved about 10 times of that just using the two-stage channel estimator. The proposed design is implemented in 90 nm CMOS technology.The gate count is 109.3 K, and the power dissipation is 1.45 mW at83.3 MHz operation frequency with 1 V power supply. However, up to 61% hardware can be reused from the existed two-stage channel estimator design. After reusing, the proposed STBC interference canceller requires only 42.2 K gates, which is 4.9% overhead of the two-stage channel estimator.

    Original languageEnglish
    Article number6481474
    Pages (from-to)2763-2773
    Number of pages11
    JournalIEEE Transactions on Circuits and Systems I: Regular Papers
    Volume60
    Issue number10
    DOIs
    StatePublished - 26 Mar 2013

    Keywords

    • Data detection
    • interference canceller
    • STBC-OFDM
    • WMAN

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