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On the Performance of the Scheduling Scheme for MU-MIMO BC System With Two-Stage Feedback


Affiliations
1 Thapar University, Patiala, India
 

Multi-user Multiple Input Multiple Output (MU-MIMO) broadcast channel (BC) deployed with multiple transmit antennas at the base station (BS) and multiple receive antennas at each user is considered. The channel state information (CSI) from each user is quantized at the user side and the CSI at the transmitter (CSIT) required to obtain the throughput for the system is obtained in terms of the feedback bits only. The main objective is to reduce the feedback load. Transmitter architecture is proposed based on the zero-forcing beam forming (ZFBF) semi-orthogonal user selection (SUS) algorithm. In the proposed system, a two-stage feedback scheme is used along with the SUS scheduling algorithm so as to minimize the feedback load. The Maximum expected SINR combiner (MESC) is exploited so that only a limited number of users convey their feedback. These methods efficiently eliminate users from transmission in feedback and scheduling process, resulting in optimum use of scarce resources. The simulation results bring us to a conclusion that SUS user selection method gives significant reduction in feedback bits and the required effective throughput is achieved.

Keywords

Multi-User MIMO, Channel State Information, SUS User Selection, MESC, Throughput.
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  • Benvenuto N. and Cherubini G.(2002). Algorithms for Communications Systems and their Applications.

  • Wiley.

  • Gesert D. and Alouini M.S.(2004) ,”How much diversity is multi-user diversity really worth?”,pp. 234238.

  • Yoo T. and Goldsmith A.(2006),On the optimality of multi-antenna Broadcast scheduling using zero-forcing Beam forming.In Int. Conf. Comm., IEEE J. Select. Areas Commun.Vol 24 No 3(pp. 528-541).

  • Trivalleto M.,Boccardi F. and Huang H.(2008),On Transreciever design and Channel Quantization for Downlink Multi-user MIMO system with Limited feedback. In IEEE Journal on Select Areas in Communication Vol 26 No. 8(PP. 1494-1503).

  • Yoo T., Jindal N. and Goldsmith A.(2002),Multi antenna downlink channels with limited feedback and user selection.In IEEE J. Sel. Areas Comm,Vol 25 No. 7(pp. 1478-1491).

  • Benvenuto N., Conte E. , Tomasin S. and Trivellato M.(2007),Joint Low-Rate Feedback and Channel Quantization for MIMO Broadcast channel. In IEEE African’07,Windhoek, Namibia.

  • Hassel V., Gesbert D., Alouini M.S. and Qien G.E.(2007),A threshold channel state feedback algorithm for Modern cellular systems.In IEEE Trans. Wireless Comm.,Vol 6 No. 7(pp. 2422-2426)

  • Min M.,Kim D., Kim H. K., and Hong G.(2013),Opportunistic Two-stage feedback and Scheduling for MIMO Downlink Systems.In IEEE Transactions on Communication.Vol 61 No. 1(pp. 312321).

  • Spencer Q. H.,Peel C. B., Swindlerhurst A.L. and Haardt M.(2004),An introduction to multi-user Downlink. In IEEE Communication Magazine, Vol 42(pp. 60-67).

  • Gesbert D., Kountorious M., Heath R., Chae C-B. and Salzer T.(2008),From Single user to Multi-user Communication: Shifting to MIMO Paradigm. In IEEE Signal processing Magazine.

  • Murakami T., Kudo R., Kumagai T. and Mizoguchi M.(2011),Performance Evaluation of Distributed Multi-cell Beamforming for MU-MIMO system. In 8th International Symposium on Wireless communication System, Aachen.


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  • On the Performance of the Scheduling Scheme for MU-MIMO BC System With Two-Stage Feedback

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Authors

Kanika Ralhan
Thapar University, Patiala, India
Surbhi Sharma
Thapar University, Patiala, India

Abstract


Multi-user Multiple Input Multiple Output (MU-MIMO) broadcast channel (BC) deployed with multiple transmit antennas at the base station (BS) and multiple receive antennas at each user is considered. The channel state information (CSI) from each user is quantized at the user side and the CSI at the transmitter (CSIT) required to obtain the throughput for the system is obtained in terms of the feedback bits only. The main objective is to reduce the feedback load. Transmitter architecture is proposed based on the zero-forcing beam forming (ZFBF) semi-orthogonal user selection (SUS) algorithm. In the proposed system, a two-stage feedback scheme is used along with the SUS scheduling algorithm so as to minimize the feedback load. The Maximum expected SINR combiner (MESC) is exploited so that only a limited number of users convey their feedback. These methods efficiently eliminate users from transmission in feedback and scheduling process, resulting in optimum use of scarce resources. The simulation results bring us to a conclusion that SUS user selection method gives significant reduction in feedback bits and the required effective throughput is achieved.

Keywords


Multi-User MIMO, Channel State Information, SUS User Selection, MESC, Throughput.

References