A Virtual Layered Successive Detector with Adaptive Transmit Signal Phase Rotation for QAM

• DENNO Satoshi

  Graduate School of Natural Science and Technology, Okayama University

• IMAMURA Jun

  Graduate School of Informatics, Kyoto University

• MORIKURA Masahiro

  Graduate School of Informatics, Kyoto University

抄録

This paper proposes a virtual layered successive detector with adaptive transmit signal phase rotation for quadrature amplitude modulation (QAM) that enables high speed communication even in downlinks of wireless communication systems. It is shown that the detection performance is degraded when the eigenvalue of a virtual channel becomes close to the power of the additive white Gaussian noise (AWGN). Therefore, adaptive transmit signal phase rotation is introduced for the detector to improve the transmission performance. For the transmit phase rotation, three techniques to search the rotation angles are proposed, which can reduce the feedback information from the receiver to the transmitter. Among the three proposed techniques, the technique called “iterative variable step step search” is shown to achieve the best performance. Actually, it is confirmed by computer simulation that the variable step search makes the detector attain about 17dB of a gain at the bit error rate (BER) of 10^-5 in 4×2 multiple-input-multiple-output (MIMO) systems.

収録刊行物

• IEICE Transactions on Communications

  IEICE Transactions on Communications E95.B (10), 3232-3241, 2012

  一般社団法人 電子情報通信学会

キーワード

• MIMO
• spatial multiplexing
• QAM
• virtual channel
• successive detection
• eigenvalue

詳細情報

• CRID: 1390001204375760896
• NII論文ID: 10031142703
• NII書誌ID: AA10826261
• DOI: 10.1587/transcom.e95.b.3232
• ISSN: 17451345
• ISSN: 09168516
• Web Site: https://www.jstage.jst.go.jp/article/transcom/E95.B/10/E95.B_3232/_pdf
• 本文言語コード: en
• データソース種別:
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• 抄録ライセンスフラグ: 使用不可