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Multi-pair massive MIMO amplify-and-forward relaying system with low-resolution ADCs: performance analysis and power control

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Abstract

In this paper, we focus on a general multi-pair massive MIMO amplify-and-forward (AF) relaying system where the relay antennas employ low-resolution analog-to-digital converters (ADCs) to reduce the hardware cost. First, considering the effect of low quantization on channel estimation, a tight closed form approximation of the system ergodic achievable rate is derived. Second, some asymptotic analysis is presented to reveal the impacts of the system parameters on the achievable rate. Particularly, the generalized power scaling schemes are characterized. The results indicate that in some cases, when the number of relay antennas grows without bound, the impact of the finite resolution ADCs on data transmission can be eliminated. To enhance the achievable rate of the quantized systems, the optimal user and relay power control schemes are proposed. Furthermore, to reap all the benefits of low-resolution ADCs, another power control scheme is also designed to minimize the total power consumption while guaranteeing the quality-of-service (QoS) requirement of each user, which can help draw some useful insights into the optimal ADC resolution from power saving perspectives. The simulation results confirm the accuracy of our theoretical analysis and the effectiveness of the proposed power control schemes.

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Acknowledgements

The work was supported by National Nature Science Foundation of China Project (Grant Nos. 61471058, 61501376, 61601018), Key National Science Foundation of China (Grant No. 61461136002), Hong Kong, Macao and Taiwan Science and Technology Cooperation Projects (Grant No. 2016YFE0122900), 111 Project of China (Grant No. B16006), Fundamental Research Funds of Central University (Grant No. 2015RC035), and Shenzhen Science and Technology Project (Grant No. JSGG20150512153045135).

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Authors and Affiliations

  1. National Engineering Laboratory for Mobile Network Security, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Qimei Cui & Yinjun Liu

  2. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, 100044, China

    Yinsheng Liu

  3. China Telecom Corporation Limited, Beijing, 100033, China

    Weiliang Xie & Yong Zhao

Authors
  1. Qimei Cui
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  2. Yinjun Liu
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  3. Yinsheng Liu
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  4. Weiliang Xie
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  5. Yong Zhao
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Correspondence to Qimei Cui.

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Conflict of interest The authors declare that they have no conflict of interest.

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Cui, Q., Liu, Y., Liu, Y. et al. Multi-pair massive MIMO amplify-and-forward relaying system with low-resolution ADCs: performance analysis and power control. Sci. China Inf. Sci. 61, 022311 (2018). https://doi.org/10.1007/s11432-017-9187-5

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  • DOI: https://doi.org/10.1007/s11432-017-9187-5

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