Novel SINR-Based User Selection for an MU-MIMO System with Limited Feedback

Kum, Donghyun; Kang, Daegeun; Choi, Sangdun

doi:10.4218/etrij.14.0113.0267

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…Multi User MIMO (MU-MIMO) which provides benefits of MIMO to more than one user is most suitable candidate to mitigate problem of higher data rates [4]. In MU-MIMO systems, spatial diversity and multiplexing techniques are used for reliable communication link and higher data rate [5]. But performance may degrade due to multiuser interference (MUI) since Base Station (BS) communicates with multiple users simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Modified Leakage Based User Selection for MU-MIMO Systems

Naeem

Khan

Bashir

et al. 2015

2015 13th International Conference on Frontiers of Information Technology (FIT)

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In multiuser MIMO systems, the spatial degrees of freedom can be effectively exploited to enhance system capacity by scheduling multiple users. This paper reviews multiuser MIMO communication from scheduling perspective, discussing performance gains, fairness, and computational complexity of leakage based scheduling algorithms. We consider well known scheduling algorithm based on user leakage power reported for MU-MIMO systems and analyze the selection criteria of first user and its impact on computational complexity of the algorithm. Through experimental validations, it is shown that if the first user is randomly selected the computational requirements are reduced with negligible performance loss. Computer simulations show that the proposed modification in the said algorithm reduces the complexity without degrading the performance.

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Section: Introductionmentioning

confidence: 99%

Modified Leakage Based User Selection for MU-MIMO Systems

Naeem

Khan

Bashir

et al. 2015

2015 13th International Conference on Frontiers of Information Technology (FIT)

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“…In [11], the author presents a comparative study of MVDR algorithm and LMS algorithm, where results show that LMS is the better performer. The SINR maximization is another criterion employed in the joint transmitter and receiver beamforming algorithms [12], [13], [14]. In an analysis of [15], the mixing of differential algorithm based LAA is applied to deepen nulls and lower side lobe levels (SLLs) in the unwanted direction, and they fou-nd the max null depth of -63 dB by using 20 element.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Noise Label on Beampattern and SINR of MVDR Beamformer

2016

IJCCIE

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Minimum Variance Distortionless Response (MVDR) is basically a unity gain adaptive beamformer which is suffered from performance degradation due to the presence of interference and noise. Also, MVDR is sensitive to errors such as the steering vector errors, and the nulling level. MVDR combined with a linear antenna array (LAA) is used to acquire desired signals and suppress the interference and noise. This paper examines the impact of the noise variance label (σn2) and the number of interference sources by using Signal to Interference plus Noise Ratio (SINR) and array beampattern as two different Figure-of-Merits to measure the performance of the MVDR beamformer with a fixed number of array elements (L). The findings of this study indicate that the MVDR have successfully placed nulls in the nonlook angle with average SINR of 99.6, 49.6, 24.9 dB dB for σn2.of-50, 0, 50 dB, respectively. Also, the MVDR provides accurate majorlobe to the real user direction, even the σn2 are bigger than desired signal power. The proposed method was found to perform better than some existing techniques. Based on this analysis, the beampattern is not heavily relies on the σn2. Moreover, the SINR strongly depends on the σn2 and the number of SNOIs.

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“…The radio interface has a high degree of commonality with the third-generation partnership project (3GPP) long-term evolution (LTE) technology for terrestrial IMT-Advanced. Terrestrial LTE is a standard for wireless high-speed data communications based on many emerging advanced technologies, including multi-input multi-output techniques and adaptive resource allocation schemes [7,8]. The SAT-OFDM also has a number of satellite-specific features for the adaptation of LTE over satellites with a long round-trip delay (RTD), large cell size, slow fading channel, and so on.…”

mentioning

confidence: 99%

SAT‐OFDM: a satellite radio interface for the IMT‐advanced system

Kim

Kang

et al. 2015

Satell Commun Network

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This paper presents the satellite orthogonal frequency division multiplexing (SAT-OFDM) technology as a satellite radio interface for international mobile telecommunications (IMT)-Advanced. The SAT-OFDM radio interface is designed to provide various advanced IMT services in satellite environments. For cost-effective deployment of a satellite IMT-Advanced system, the radio interface must have a high degree of commonality with third-generation partnership project long-term evolution (3GPP LTE) technology for IMT-Advanced, but it also has a number of different features. Those features are needed to adapt the 3GPP LTE technology for satellite-specific environments such as long round-trip delay, large cell size, and slow-fading satellite channel. In this paper, we summarize the key features of the SAT-OFDM technology and propose satellite specific features included in the SAT-OFDM technology as an adaption way of LTE over satellite. Then we show the performance evaluation results of the SAT-OFDM technology to see the feasibility of LTE over satellite. communication with space stations cannot be guaranteed [2]. The CGCs will provide more efficient spectrum usage, and the improved coverage would further attract large consumer markets, resulting in increased economies of scale. This will reduce the costs of producing handheld terminals and the overall price of services to end users, ensuring reduced cost of the satellite IMT in remote areas. In many regions, satellite IMT operators are allowed to deploy CGCs in order to improve service coverage. Broadband services can be provided to single-mode user equipment (UE), that is, quasi-terrestrial IMT UE, through a satellite and the CGC operating within the satellite frequency bands [3].In such integrated satellite IMT systems, one of the key issues is how to optimize the spectral efficiency of the mobile satellite service (MSS) system as a whole (satellite plus CGC). CGCs are different from the independent ground components used in the mobile systems, as they are technically and operationally an integral part of the satellite system and are controlled by the common resource and network management mechanism of such a system operating in the same frequencies as the associated satellite components and are delivered to integrated user equipment. The frequency reuse between the satellite and CGCs will inevitably imply co-channel interference, which might degrade the performance of the MSS system. Service scenarios and a flexible frequency reuse scheme are effective means for optimized spectrum utilization between the satellite and CGC [4]. In addition, intelligent resource allocation and interference management techniques can be utilized [5,6].The satellite radio interface for IMT-Advanced may support flexible carrier bandwidth and dynamic resource and interference management for integrated satellite IMT systems. The other key issue is the implementation of a single cost-effective UE supporting both the satellite and the CGC by possibly reusing terrestrial IMT-Advanced UE. In that...

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Novel SINR-Based User Selection for an MU-MIMO System with Limited Feedback

Cited by 9 publications

References 11 publications

Modified Leakage Based User Selection for MU-MIMO Systems

Modified Leakage Based User Selection for MU-MIMO Systems

The Impact of Noise Label on Beampattern and SINR of MVDR Beamformer

SAT‐OFDM: a satellite radio interface for the IMT‐advanced system

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