[1] R. Vannithamby and S. Talwar, Towards 5G Applications, Requirements and Candidate Technologies. 2017.
[2] P. M. Afif Osseiran, Jose F. Monserrat, 5G Mobile and Wireless Communications Technology. 2016.
[3] C. T. Marzetta, Proc., San Diego, “The case for MANY (greater than 16) antennas as the base station,” Inf. Theory its Appl. (ITA), 2007.
[4] T. L. Marzetta, “Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas,” IEEE Trans. Wirel. Commun., vol. 9, no. 11, pp. 3590–3600, Nov. 2010.
[5] and M. D. J. Hoydis, S. Ten Brink, “Massive MIMO in the UL/DL of cellular networks: How many antennas do we need?,” Sel. Areas Commun. IEEE J., vol. 31, p. 160–171., 2013.
[6] F. Rusek, D. Persson, Buon Kiong Lau, E. G. Larsson, T. L. Marzetta, and F. Tufvesson, “Scaling Up MIMO: Opportunities and Challenges with Very Large Arrays,” IEEE Signal Process. Mag., vol. 30, no. 1, pp. 40–60, Jan. 2013.
[7] E. Björnson, J. Hoydis, and L. Sanguinetti, “Massive MIMO Networks: Spectral, Energy, and Hardware Efficiency,” Found. Trends® Signal Process., vol. 11, no. 3–4, pp. 154–655, 2017.
[8] M. T. D. D. Systems et al., “Pilot Contamination and Precoding in Multi-Cell TDD Systems,” IEEE Trans. Wirel. Commun., vol. 10, no. 8, pp. 2640–2651, 2011.
[9] and X. Y. K. Zheng, S. Ou, “Massive MIMO channel models: A survey,” Int. J. Antennas Propagation,.
[10] K. Zheng, S. Ou, and X. Yin, “Massive MIMO Channel Models: A Survey,” Int. J. Antennas Propag., vol. 2014, pp. 1–10, 2014.
[11] F. Fernandes, A. Ashikhmin, and T. L. Marzetta, “Inter-Cell Interference in Noncooperative TDD Large Scale Antenna Systems,” IEEE J. Sel. Areas Commun., vol. 31, no. 2, pp. 192–201, Feb. 2013.
[12] Hualei Wang, Zhengang Pan, Jiqing Ni, and Chih-Lin I, “A spatial domain based method against pilot contamination for multi-cell massive MIMO systems,” in 2013 8th International Conference on Communications and Networking in China (CHINACOM), 2013, pp. 218–222.
[13] Yang Li, Young-Han Nam, Boon Loong Ng, and Jianzhong Zhang, “A non-asymptotic throughput for massive MIMO cellular uplink with pilot reuse,” in 2012 IEEE Global Communications Conference (GLOBECOM), 2012, pp. 4500–4504.
[14] K. Appaiah, A. Ashikhmin, and T. L. Marzetta, “Pilot Contamination Reduction in Multi-User TDD Systems,” in 2010 IEEE International Conference on Communications, 2010, pp. 1–5.
[15] “F. Fernandes, A. Ashikhmin, and T. Marzetta, ‘Interference reduction on cellular networks with large antenna arrays,’ in Proc. of IEEE International Conference on Communications (ICC), 2012.”
[16] L. Lu, G. Y. Li, A. L. Swindlehurst, A. Ashikhmin, and R. Zhang, “An Overview of Massive MIMO: Benefits and Challenges,” IEEE J. Sel. Top. Signal Process., vol. 8, no. 5, pp. 742–758, Oct. 2014.
[17] V. L. Saxena, “Pilot Contamination and Mitigation Techniques in Massive MIMO Systems,” 2014.
[18] E. Bjornson, E. De Carvalho, J. H. Sorensen, E. G. Larsson, and P. Popovski, “A Random Access Protocol for Pilot Allocation in Crowded Massive MIMO Systems,” IEEE Trans. Wirel. Commun., vol. 16, no. 4, pp. 2220–2234, 2017.
[19] N. Fatema, G. Hua, Y. Xiang, D. Peng, and I. Natgunanathan, “Massive MIMO Linear Precoding: A Survey,” IEEE Syst. J., pp. 1–12, 2017.
[20] J. Jose, A. Ashikhmin, T. L. Marzetta, and S. Vishwanath, “Pilot Contamination and Precoding in Multi-Cell TDD Systems,” IEEE Trans. Wirel. Commun., vol. 10, no. 8, pp. 2640–2651, Aug. 2011.
[21] H. Huh, S.-H. Moon, Y.-T. Kim, I. Lee, and G. Caire, “Multi-Cell MIMO Downlink With Cell Cooperation and Fair Scheduling: A Large-System Limit Analysis,” IEEE Trans. Inf. Theory, vol. 57, no. 12, pp. 7771–7786, Dec. 2011.
[22] H. Huh, A. M. Tulino, and G. Caire, “Network MIMO With Linear Zero-Forcing Beamforming: Large System Analysis, Impact of Channel Estimation, and Reduced-Complexity Scheduling,” IEEE Trans. Inf.
Theory, vol. 58, no. 5, pp. 2911–2934, May 2012.
[23] A. Ashikhmin and T. Marzetta, “Pilot contamination precoding in multi-cell large scale antenna systems,” in 2012 IEEE International Symposium on Information Theory Proceedings, 2012, pp. 1137–1141.
[24] A. Ashikhmin, T. L. Marzetta, and L. Li, “Interference Reduction in Multi-Cell Massive MIMO Systems I: Large-Scale Fading Precoding and Decoding,” Nov. 2014.
[25] Z. G. Zhang C, “Pilot contamination reduction scheme in massive MIMO multi-cell TDD systems. J. Comput. Inf. Syst..,” Comput. Inf. Syst, p. 10(15):6721-9., 2014.
[26] M. A. Latif Sarker and M. H. Lee, “A fast channel estimation and the reduction of pilot contamination problem for massive MIMO based on a diagonal Jacket matrix,” in 2013 4th International Workshop on Fiber Optics in Access Network (FOAN), 2013, pp. 26–30.
[27] J. Zhang, X. Yuan, and L. Ping, “Hermitian Precoding for Distributed MIMO Systems with Individual Channel State Information,” IEEE J. Sel. Areas Commun., vol. 31, no. 2, pp. 241–250, Feb. 2013.
[28] N. N. Moghadam, H. Shokri-Ghadikolaei, G. Fodor, M. Bengtsson, and C. Fischione, “Pilot Precoding and Combining in Multiuser MIMO Networks,” IEEE J. Sel. Areas Commun., vol. 35, no. 7, pp. 1632–1648, 2017.
[29] H. Yin, D. Gesbert, M. Filippou, and Y. Liu, “A Coordinated Approach to Channel Estimation in Large-Scale Multiple-Antenna Systems,” IEEE J. Sel. Areas Commun., vol. 31, no. 2, pp. 264–273, Feb. 2013.
[30] H. Yin, D. Gesbert, M. C. Filippou, and Y. Liu, “Decontaminating pilots in massive MIMO systems,” in 2013 IEEE International Conference on Communications (ICC), 2013, pp. 3170–3175.
[31] M. Filippou, D. Gesbert, and H. Yin, “Decontaminating pilots in cognitive massive MIMO networks,” in 2012 International Symposium on Wireless Communication Systems (ISWCS), 2012, pp. 816–820.
[32] Jiann-An Tsai, R. M. Buehrer, and B. D. Woerner, “The impact of AOA energy distribution on the spatial fading correlation of linear antenna array,” in Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367), vol. 2, pp. 933–937.
[33] J. Zhang, B. Zhang, S. Chen, X. Mu, M. El-Hajjar, and L. Hanzo, “Pilot Contamination Elimination for Large-Scale Multiple-Antenna Aided OFDM Systems,” IEEE J. Sel. Top. Signal Process., vol. 8, no. 5, pp. 759–772, Oct. 2014.
[34] L. Zhao, G. Geraci, T. Yang, D. W. K. Ng, and J. Yuan, “A Tone-based AoA Estimation and Multiuser Precoding for Millimeter Wave Massive MIMO,” IEEE Trans. Commun., vol. 6778, no. c, pp. 1–17, 2017.
[35] X. Luo, P. Cai, X. Zhang, D. Hu, and C. Shen, “A Scalable Framework for CSI Feedback in FDD Massive MIMO via DL Path Aligning,” IEEE Trans. Signal Process., vol. 65, no. 18, pp. 4702–4716, Sep. 2017.
[36] H. Q. Ngo and E. G. Larsson, “EVD-based channel estimation in multicell multiuser MIMO systems with very large antenna arrays,” in 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012, pp. 3249–3252.
[37] S. Talwar, M. Viberg, and A. Paulraj, “Blind separation of synchronous co-channel digital signals using an antenna array. I. Algorithms,” IEEE Trans. Signal Process., vol. 44, no. 5, pp. 1184–1197, May 1996.
[38] R. R. Muller, L. Cottatellucci, and M. Vehkapera, “Blind Pilot Decontamination,” IEEE J. Sel. Top. Signal Process., vol. 8, no. 5, pp. 773–786, Oct. 2014.
[39] L. Cottatellucci, R. R. Muller, and M. Vehkapera, “Analysis of Pilot Decontamination Based on Power Control,” in 2013 IEEE 77th Vehicular Technology Conference (VTC Spring), 2013, pp. 1–5.
[40] “Neumann D, Gruendinger A, Joham M, Utschick W. Pilot coordination for large-scale multi-cell TDD systems. InSmart Antennas (WSA), 2014 18th International ITG Workshop on 2014 Mar 12 (pp. 1-6). VDE.”
[41] D. Hu, L. He, and X. Wang, “Semi-Blind Pilot Decontamination for Massive MIMO Systems,” IEEE Trans. Wirel. Commun., vol. 15, no. 1, pp. 525–536, Jan. 2016.
[42] D. Verenzuela, E. Björnson, and L. Sanguinetti, “Spectral and Energy Efficiency of Superimposed Pilots in Uplink Massive MIMO,” arXiv Prepr. arXiv1709.07722., pp. 1–32, Sep. 2017.
[43] H. Zhang, S. Gao, D. Li, H. Chen, and L. Yang, “On Superimposed Pilot for Channel Estimation in Multicell Multiuser MIMO Uplink: Large System Analysis,” IEEE Trans. Veh. Technol., vol. 65, no. 3, pp. 1492–1505, 2016.
[44] X. Zhu, Z. Wang, L. Dai, and C. Qian, “Smart Pilot Assignment for Massive MIMO,” IEEE Commun. Lett., vol. 19, no. 9, pp. 1644–1647, Sep. 2015.
[45] Y. Du, M. Li, Y. Huang, X. Gao, and S. Jin, “Pilot scheduling schemes for multi-cell massive multiple-input–multiple-output transmission,” IET Commun., vol. 9, no. 5, pp. 689–700, 2015.
[46] T. M. Nguyen, V. N. Ha, and L. Bao Le, “Resource Allocation Optimization in Multi-User Multi-Cell Massive MIMO Networks Considering Pilot Contamination,” IEEE Access, vol. 3, pp. 1272–1287, 2015.
[47] X. Zhu, L. Dai, Z. Wang, and X. Wang, “Weighted-Graph-Coloring-Based Pilot Decontamination for Multicell Massive MIMO Systems,” IEEE Trans. Veh. Technol., vol. 66, no. 3, pp. 2829–2834, 2017.
[48] H. Han, Y. Li, and X. Guo, “A Graph-Based Random Access Protocol for Crowded Massive MIMO Systems,” IEEE Trans. Wirel. Commun., vol. 16, no. 11, pp. 7348–7361, Nov. 2017.
[49] X. Zhu et al., “Graph Coloring Based Pilot Allocation to Mitigate Pilot Contamination for Multi-Cell Massive MIMO Systems,” IEEE Commun. Lett., vol. 19, no. 10, pp. 1842–1845, 2018.
[50] X. Zhu et al., “Soft pilot reuse and multicell block diagonalization precoding for massive MIMO systems,” IEEE Trans. Veh. Technol., vol. 65, no. 5, pp. 3285–3298, 2016.
[51] J. Hoydis, C. Hoek, T. Wild, and S. ten Brink, “Channel measurements for large antenna arrays,” in
2012 International Symposium on Wireless Communication Systems (ISWCS), 2012, pp. 811–815.
[52] “Han Y, Ni J, Du G. The potential approaches to achieve channel reciprocity in FDD system with frequency correction algorithms. InCommunications and Networking in China (CHINACOM), 2010 5th International ICST Conference on 2010 Aug 25 (pp. 1-5). IEEE.”
[53] E. Bjornson, J. Hoydis, M. Kountouris, and M. Debbah, “Hardware impairments in large-scale MISO systems: Energy efficiency, estimation, and capacity limits,” in 2013 18th International Conference on Digital Signal Processing (DSP), 2013, pp. 1–6.
[54] E. Bjornson, J. Hoydis, M. Kountouris, and M. Debbah, “Massive MIMO Systems With Non-Ideal Hardware: Energy Efficiency, Estimation, and Capacity Limits,” IEEE Trans. Inf. Theory, vol. 60, no. 11, pp. 7112–7139, Nov. 2014.
[55] A. Pitarokoilis, S. K. Mohammed, and E. G. Larsson, “Effect of oscillator phase noise on uplink performance of large MU-MIMO systems,” in 2012 50th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2012, pp. 1190–1197.
[56] A. Pitarokoilis, S. K. Mohammed, and E. G. Larsson, “Uplink Performance of Time-Reversal MRC in Massive MIMO Systems Subject to Phase Noise,” IEEE Trans. Wirel. Commun., vol. 14, no. 2, pp. 711–723, Feb. 2015.
[57] S. K. Mohammed and E. G. Larsson, “Single-User Beamforming in Large-Scale MISO Systems with Per-Antenna Constant-Envelope Constraints: The Doughnut Channel,” IEEE Trans. Wirel. Commun., vol. 11, no. 11, pp. 3992–4005, Nov. 2012.
[58] S. K. Mohammed and E. G. Larsson, “Per-Antenna Constant Envelope Precoding for Large Multi-User MIMO Systems,” IEEE Trans. Commun., vol. 61, no. 3, pp. 1059–1071, Mar. 2013.
[59] X. Artiga, B. Devillers, and J. Perruisseau-Carrier, “Mutual coupling effects in multi-user massive MIMO base stations,” in Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation, 2012, pp. 1–2.
[60] O. N. Alrabadi, E. Tsakalaki, H. Huang, and G. F. Pedersen, “Beamforming via Large and Dense Antenna Arrays Above a Clutter,” IEEE J. Sel. Areas Commun., vol. 31, no. 2, pp. 314–325, Feb. 2013.
[61] X. Yan, H. Yin, M. Xia, and G. Wei, “Pilot sequences allocation in TDD massive MIMO systems,” 2015 IEEE Wirel. Commun. Netw. Conf. WCNC 2015, pp. 1488–1493, 2015.
[62] X. Zhu, L. Dai, and Z. Wang, “Graph Coloring Based Pilot Allocation to Mitigate Pilot Contamination for Multi-Cell Massive MIMO Systems,” IEEE Commun. Lett., vol. 19, no. 10, pp. 1842–1845, 2015.
[63] H. Ahmadi, A. Farhang, N. Marchetti, and A. MacKenzie, “A Game Theoretic Approach for Pilot Contamination Avoidance in Massive MIMO,” IEEE Wirel. Commun. Lett., vol. 5, no. 1, pp. 12–15, 2016.
[64] R. Mochaourab, E. Bjornson, and M. Bengtsson, “Adaptive pilot clustering in heterogeneous massive MIMO networks,” IEEE Trans. Wirel. Commun., vol. 15, no. 8, pp. 5555–5568, 2016.
[65] R. Mochaourab, E. Bjornson, and M. Bengtsson, “Pilot clustering in asymmetric massive MIMO networks,” IEEE Work. Signal Process. Adv. Wirel. Commun. SPAWC, vol. 2015–Augus, pp. 231–235, 2015.
[66] N. Zhang, Z. Q. Bai, B. Zhang, Y. Y. Su, T. Han, and K. S. Kwak, “Genetic algorithm based pilot allocation scheme for massive MIMO system,” in 2016 IEEE International Conference on Communication Systems (ICCS), 2016, pp. 1–5.
[67] B. Zhang et al., “Artificial fish swarm algorithm based pilot allocation in massive MIMO system,” in 2016 16th International Symposium on Communications and Information Technologies (ISCIT), 2016, pp. 82–86
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