面向大规模天线系统的稀布阵技术研究与评估

doi:10.11959/j.issn.1000-0801.2021218

Abstract

Abstract:

Massive multiple-input multiple-output (mMIMO) enables higher spectrum efficiency by deploying a large number of antenna elements.However, mMIMO will bring a substantial increase in the number of radio frequency (RF) channel, which will result in a sharp increase in cost.Therefore, it is necessary to design mMIMO with comprehensive consideration of the trade-off between the performance and the cost.Sparse array technology can approach the performance of the uniform array with less number of antenna elements by optimizing the position distribution and excitation amplitudes of the antenna elements, thereby reducing the number of RF channels and controlling the cost, and achieving a better cost-effective balance.Both link-level and system-level evaluations and analysis of sparse array based mMIMO that targets for 6G were performed under realistic simulation settings.The results show that with little performance loss, the sparse array based mMIMO can significantly reduce the number of antenna elements and the cost of base station infrastructure.

Key words: 6G, sparse array, massive MIMO, convex optimization, antenna synthesization

CLC Number:

TP393

Mengting LOU, Jing JIN, Hanning WANG, Qixing WANG, Jiangzhou WANG. Research and evaluation of sparse array for massive MIMO[J]. Telecommunications Science, 2021, 37(9): 48-56.

Figures/Tables 9

平面阵	3 dB波束宽度/°			最大副瓣电平/dB
平面阵	${\hat{φ}}_{1} = 0^{\circ}$	${\hat{φ}}_{2} = 20^{\circ}$	${\hat{φ}}_{3} = 40^{\circ}$	${\hat{φ}}_{1} = 0^{\circ}$	${\hat{φ}}_{2} = 20^{\circ}$	${\hat{φ}}_{3} = 40^{\circ}$
64-UPA	12.56	13.21	15.34	-14.05	-11.71	-9.31
52-SPA	12.56	13.22	15.35	-14.04	-11.70	-9.30
32-SPA	12.73	13.39	15.52	-14.02	-11.68	-6.50

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变量	数值	变量	数值
基站数/小区数	19/57		64-UPA：64Tx64Rx
站间距	350 m	基站天线配置	52-SPA：52Tx52Rx
基站高度	25 m		32-SPA：32Tx32Rx
系统带宽	100 MHz	基站发射功率	53 dBm
载频	2.4 GHz	终端天线配置	2Tx2Rx
子载波间隔	30 kHz	终端发射功率	23 dBm
业务模型	full buffer，50%加扰	终端移动速度	3 km/h

平面阵	稀疏度	小区边缘用户吞吐量/(Mbit.s^-1)	小区平均吞吐量/(Mbit.s^-1)
64-UPA	—	45.60	1 201.90
52-SPA	18.75%	43.90	1 063.25
32-SPA	50.00%	40.75	1 000.95

Research and evaluation of sparse array for massive MIMO

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