Spectral and energy efficiency analysis for massive MIMO multi-pair two-way relaying networks under generalized power scaling

Spectral and energy efficiency analysis for massive MIMO multi-pair two-way relaying networks under generalized power scaling
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广义功率缩放下大规模 MIMO 多对双向中继网络的频谱和能效分析

DOI:
10.1007/s11432-016-9007-2
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发表时间:
2017-03
期刊:
Science China Information Sciences
影响因子:
--
通讯作者:
Ding Zhiguo
Ding Zhiguo
中科院分区:
其他
文献类型:
--
作者:
Yang Jing;Wang Hongyan;Ding Jie;Gao Xiqi;Ding Zhiguo

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在这项工作中,我们调查的频谱效率(SE)和能量效率(EE)的大规模多输入多输出多对双向放大和转发中继系统,其中多对用户交换信息,通过一个中继站配备了大规模的天线。我们假设不完美的信道状态信息是可用的,并在中继站采用最大比合并/最大比传输波束成形。考虑到导频序列的发射功率是恒定的或缩放的,我们量化了一般功率缩放方案下的渐近SE和EE,其中每个用户和中继站的发射功率都可以按比例缩小,因为中继天线的数量趋于无穷大。此外,已获得封闭形式的表达式的SE近似。我们的研究结果表明,通过使用大量的中继天线,在每个用户和中继站的发射功率可以按比例缩小,与非零的信号干扰噪声比(SINR)。最后,仿真结果证实了我们的分析的有效性。
In this work, we investigate the spectral efficiency (SE) and energy efficiency (EE) for a massive multiple-input multiple-output multi-pair two-way amplify-and-forward relaying system, where multi-pair users exchange information via a relay station equipped with large scale antennas. We assume that imperfect channel state information is available and maximum-ratio combining/maximum-ratio transmission beamforming is adopted at the relay station. Considering constant or scaled transmit power of pilot sequences, we quantify the asymptotic SE and EE under general power scaling schemes, in which the transmit power at each user and relay station can both be scaled down, as the number of relay antennas tends to infinity. In addition, a closed-form expression of the SE has been obtained approximately. Our results show that by using massive relay antennas, the transmit power at each user and the relay station can be scaled down, with a non-vanishing signal to interference and noise ratio (SINR). Finally, simulation results confirm the validity of our analysis.
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