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

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

Research output: Contribution to journalArticlepeer-review

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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