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No-Zero-Entry Space-Time Block Codes Over Time-Selective Fading Channels for MIMO Systems

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Abstract

In MIMO systems, space-time block code (STBC) is good solution for improving system performance. Among the STBCs, coordinate interleaved orthogonal designs (CIODs) combined with QR-decomposition-based decision-feedback decoding (QR-DDF) allow achieving good performance for time-selective fading channels. However, half of entries in codeword matrix of CIODs are zeros. These zero entries result in high peak-to-average power ratio (PAPR) and also impose a severe constraint on hardware implementation of the code when turning off some of the transmitting antennas whenever a zero is transmitted. In this paper, we propose a new design of space-time block codes without zero entry in codeword matrix (NZE-STBCs) for time-selective fading channels. The main advantage of the proposed NZE-STBCs is that its peak-to-average ratio (PAPR) is 3 dB lower than that of CIODs, and its hardware implementation is also easier due to eliminating on-off switchers without sacrificing performance. Moreover, similar as CIODs, the proposed NZE-STBCs can use low complexity QR-DDF decoder over time-selective fading channels to enhance performance and reduce decoding complexity. Simulation results show that the proposed NZE-STBCs outperform CIODs for three transmit antennas while performing the same for two and four transmit antennas.

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Authors and Affiliations

  1. Faculty of Radio-Electronics, Le Quy Don Technical University, Hanoi, Vietnam

    Van-Bien Pham

  2. Department of Communication Engineering, Nanjing University of Science and Technology, Nanjing, China

    Wei-Xing Sheng

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  1. Van-Bien Pham
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  2. Wei-Xing Sheng
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Correspondence to Van-Bien Pham.

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Pham, VB., Sheng, WX. No-Zero-Entry Space-Time Block Codes Over Time-Selective Fading Channels for MIMO Systems. Wireless Pers Commun 75, 35–47 (2014). https://doi.org/10.1007/s11277-013-1339-x

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  • DOI: https://doi.org/10.1007/s11277-013-1339-x

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