Spectral efficiency of multi-cell multi-user DAS with pilot contamination

Wang, Dongming; Chen, Ji; Sun, Shaojun; You, Xiaohu

doi:10.1109/wcnc.2013.6555076

Cited by 16 publications

(15 citation statements)

References 21 publications

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“…Considering minimum mean-square error (MMSE) channel estimator, the equivalent channel for multi-cell multi-user large-scale DAS with pilot contamination has been given in [13] byĝ…”

Section: Channel Estimation With Pilot Contaminationmentioning

confidence: 99%

“…The spectral efficiency of small-scale DAS has been extensively studied in both single cell environment [8], [9] and multicell environment [10], [11]. For large-scale DAS, the asymptotic rate analysis for nonorthogonal downlink single-cell multi-user systems with colocated and distributed antennas was presented in [12] and the uplink spectral efficiency of multi-cell multi-user DAS with pilot contamination was studied in [13]. These theoretical results show that DAS has large performance gains compared with co-located antenna system (CAS).…”

Section: Introductionmentioning

confidence: 99%

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Downlink spectral efficiency of multi-cell multi-user large-scale DAS with pilot contamination

Wang

Zhu

et al. 2015

2015 IEEE International Conference on Communications (ICC)

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In this paper, the downlink spectral efficiency of multi-cell multi-user large-scale distributed antenna systems (DASs) is studied in the presence of pilot contamination. Based on the properties of Gamma distribution, the closed-form expression is derived for the downlink achievable rate with maximum ratio transmission (MRT). The ultimate rate is also given when the ratio of the total number of base station (BS) antennas to the number of users goes to infinity. Finally, the results are validated via numerical simulations. It is shown that the closedform expression is very accurate, and the downlink achievable rate of large-scale DAS is much larger than that of co-located massive multiple-input multiple-output (MIMO) with the same antenna configuration.

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“…Considering minimum mean-square error (MMSE) channel estimator, the equivalent channel for multi-cell multi-user large-scale DAS with pilot contamination has been given in [13] byĝ…”

Section: Channel Estimation With Pilot Contaminationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Downlink spectral efficiency of multi-cell multi-user large-scale DAS with pilot contamination

Wang

Zhu

et al. 2015

2015 IEEE International Conference on Communications (ICC)

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“…Using the minimum mean square error (MMSE) receiver, the sum-rate can be written as [21] C = log 2 det…”

Section: A Theoretical Analysis Of Spectral Efficiencymentioning

confidence: 99%

“…The downlink capacity of large-scale DAS was studied with maximun ratio transmission (MRT) precoder according to the above model with pilot contamination in [22]. The results in [21], [22] demonstrated that under the same condition, the uplink capacity of large-scale distributed MIMO systems has 100% improvement than that of massive MIMO systems with MMSE receiver, while the improvement is 50% with MRT in the downlink.…”

Section: A Theoretical Analysis Of Spectral Efficiencymentioning

confidence: 99%

An overview of transmission theory and techniques of large-scale antenna systems for 5G wireless communications

WANG¹,

YOU²,

Yu³

et al. 2015

Sci. Sin.-Inf.

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To meet the future demand for huge traffic volume of wireless data service, the research on the fifth generation (5G) mobile communication systems has been undertaken in recent years. It is expected that the spectral and energy efficiencies in 5G mobile communication systems should be ten-fold higher than the ones in the fourth generation (4G) mobile communication systems. Therefore, it is important to further exploit the potential of spatial multiplexing of multiple antennas. In the last twenty years, multiple-input multiple-output (MIMO) antenna techniques have been considered as the key techniques to increase the capacity of wireless communication systems. When a large-scale antenna array (which is also called massive MIMO) is equipped in a base-station, or a large number of distributed antennas (which is also called large-scale distributed MIMO) are deployed, the spectral and energy efficiencies can be further improved by using spatial domain multiple access. This paper provides an overview of massive MIMO and large-scale distributed MIMO systems, including spectral efficiency analysis, channel state information (CSI) acquisition, wireless transmission technology, and resource allocation. Index TermsThe fifth generation mobile communication, massive MIMO, large-scale distributed antenna systems, spectral efficiency, channel state information acquisition, multi-user MIMO, resource allocation.

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“…Therefore, large-scale DAS is a very promising technique for 5G system, especially for indoor [1] or outdoor hotspot coverage [2]. Recently, both theoretical and experimental results show that large scale DAS can provide very large spectral efficiency [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Multi-User Distributed Antenna System for 5G Wireless Communications

Wang

Zhao

Huang

et al. 2015

2015 IEEE 81st Vehicular Technology Conference (VTC Spring)

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In this paper, we study the large-scale multi-user distributed antenna system (DAS) for hot-spot coverage in the future 5G wireless network. Firstly, the multi-user system model of large-scale DAS is introduced and a simple random pilot reuse scheme is presented to reduce the overhead of pilot. Then, the sum-rate of system is derived, and its asymptotical performance is studied when the number of antennas goes to infinity. Moreover, an attractive method for large-scale DAS using matrix sparsification is presented to simplify the signal processing, which is of great significance for the future research. Finally, we study the detection bit error ratio (BER) and area spectral efficiency of large-scale DAS.

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Spectral efficiency of multi-cell multi-user DAS with pilot contamination

Cited by 16 publications

References 21 publications

Downlink spectral efficiency of multi-cell multi-user large-scale DAS with pilot contamination

Downlink spectral efficiency of multi-cell multi-user large-scale DAS with pilot contamination

An overview of transmission theory and techniques of large-scale antenna systems for 5G wireless communications

Large-Scale Multi-User Distributed Antenna System for 5G Wireless Communications

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