Training sequence reduction for A blind single antenna interference cancellation algorithm in MQAM-OFDM systems

Zhenyu Zhou*, Takuro Sato

*この研究の対応する著者

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

In orthogonal frequency division multiplexing (OFDM) based cellular systems, co-channel interference (CCI) from adjacent interfering base stations (BSs) would greatly degrade the bit error rate (BER) performance of cell-border users. In the previous work, a blind single antenna interference cancellation (SAIC) algorithm named least mean square-blind joint maximum likelihood sequence estimation (LMS-BJMLSE) has been proposed. The proposed LMS-BJMLSE algorithm is blind with respect to interfering signals and neither the training sequence (TS) nor pilot signal from interferers is needed. However, the conventional LMS-BJMLSE requires a long training sequence (TS) for channel estimation. In this paper, we propose a TS reduction scheme in which the subcarriers are divided into small groups based on the coherence bandwidth, and the slowest converging subcarrier in each group is identified by exploiting the correlation between the mean-square error (MSE) produced by LMS and the mean-square deviation (MSD) of the desired signal. The identified subcarrier's channel estimate is replaced by the interpolation result using the adjacent subcarriers' channel estimates. Simulation results demonstrate that the proposed algorithm could reduce the required TS length by 80%.

本文言語English
ホスト出版物のタイトル2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
ページ36-40
ページ数5
DOI
出版ステータスPublished - 2010 12 1
イベント2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 - Istanbul, Turkey
継続期間: 2010 9 262010 9 30

出版物シリーズ

名前IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Conference

Conference2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
国/地域Turkey
CityIstanbul
Period10/9/2610/9/30

ASJC Scopus subject areas

  • 電子工学および電気工学

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