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Multi-user Multi-stream Vector Perturbation Precoding

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Abstract

Vector perturbation (VP) is a prominent precoding technique attracted a lot of attention in recent years. Till now, however, various extended VP techniques are almost restricted to one antenna configuration of each user, termed as multi-user single-stream VP, which contradicts with the multi-antenna terminals of the next generation wireless systems. So, the popular block diagonal (BD) algorithm and VP was naturally combined and proposed to solve this problem. However, the so-called BD-VP completely suppresses multi-user interference at the expense of noise enhancement and results in performance degradation. To overcome the shortcoming of BD-VP, we propose three criteria based multi-user multi-stream VP (MUMS-VP) algorithms with different performance and complexity tradeoffs: zero-forcing expanded channel inversion (ZF ECI)-VP algorithm, minimum-total-mean-square-error criterion (MTMSE) based two MUMS-VP algorithms and maximum signal-to-leakage-and-noise-ratio (MSLNR) criterion based MUMS-VP algorithm. The general expression of achievable rates of MUMS-VP algorithms is derived. Analysis and simulation results show that the proposed ZF MUMS-VP is equivalent to BD-VP, while MTMSE MUMS-VP II has the maximum achievable sum rates among these algorithms. MTMSE MUMS-VP I, II and MSLNR MUMS-VP greatly outperform BD-VP in BER performance for both fixed modulation scenario and adaptive modulation scenario. Furthermore, all proposed algorithms have much lower complexity than BD-VP.

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Authors and Affiliations

  1. Broadband Wireless Communications Laboratory, Information Science Institute, State Key Laboratory of Integrated Service Networks, Xidian University, Xian, China

    Rui Chen, Jiandong Li, Changle Li & Wei Liu

  2. School of Electronics and Computer Science, University of Southampton, Southampton, SO17 1BJ, UK

    Wei Liu

Authors
  1. Rui Chen
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  2. Jiandong Li
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  3. Changle Li
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  4. Wei Liu
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Correspondence to Rui Chen.

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Chen, R., Li, J., Li, C. et al. Multi-user Multi-stream Vector Perturbation Precoding. Wireless Pers Commun 69, 335–355 (2013). https://doi.org/10.1007/s11277-012-0576-8

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  • DOI: https://doi.org/10.1007/s11277-012-0576-8

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