An Efficient Pilot Allocation Scheme for Pilot Contamination Alleviation in Multi-cell Massive MIMO Systems

Khan K., Sun S., İRFAN M., Fu M., Banoori F., Alam S., ...daha çox

6th Conference on Signal and Information Processing, Networking and Computers, ICSINC 2019, Guiyang, China, 13 - 16 August 2019, vol.628 LNEE, pp.27-36, (Full Text) identifier

  • Nəşrin Növü: Conference Paper / Full Text
  • Cild: 628 LNEE
  • Doi nömrəsi: 10.1007/978-981-15-4163-6_4
  • Çap olunduğu şəhər: Guiyang
  • Ölkə: China
  • Səhifə sayı: pp.27-36
  • Açar sözlər: Channel State Information, Inter-Cell Interference, Massive MIMO, Pilot Allocation, Pilot Contamination
  • Açıq Arxiv Kolleksiyası: Konfrans Materialı
  • Adres: Bəli

Qısa məlumat

In massive multiple-input multiple-output (MIMO) systems, Pilot Contamination (PC) is considered as a key barrier in enhancing the Spectral Efficiency (SE) for fifth generation (5G) technology. To significantly suppress PC and to enhance the SE of the system a novel scheme “Efficient Sectorization-based Pilot Allocation (ES-PA)” is proposed in this paper. According to this ES-PA scheme the users (UEs) are divided on the basis of their signal-to-interference-plus-noise ratios into two zones i.e. cell center and edge zones. Furthermore, the edge zone is partitioned into N uniform sectors by using smart antenna techniques. The UEs in the cell center zone in the entire system are assigned with identical pilot sequences due to less Inter-Cell Interference (ICI). The edge zone UEs in each sector are assigned with mutually orthogonal pilot sequences due to the higher ICI and to mitigate the PC. The simulation outcomes reveal that the proposed scheme significantly reduces PC, attains lower mean squared error, higher data rate and better SE than conventional pilot allocation techniques.