Massive MIMO Performance - TDD Versus FDD: What Do Measurements Say?

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Downlink beamforming in Massive MIMO either relies on uplink pilot measurements--exploiting reciprocity and time-division duplexing (TDD) operation, or on the use of a predetermined grid of beams with user equipments reporting their preferred beams, mostly in frequency-division duplexing (FDD) operation. Massive MIMO in its originally conceived form uses the first strategy, with uplink pilots, whereas there is currently significant commercial interest in the second, grid-of- beams. It has been analytically shown that with isotropic scattering (independent Rayleigh fading) the first approach outperforms the second. Nevertheless, there remains controversy regarding their relative performance in practical channels. In this contribution, the performances of these two strategies are compared using measured channel data at 2.6 GHz.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Linköping University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Kommunikationssystem

Nyckelord

Originalspråkengelska
Sidor (från-till)2247-2261
TidskriftIEEE Transactions on Wireless Communications
Volym17
Utgåva nummer4
Tidigt onlinedatum2018 jan 12
StatusPublished - 2018 apr
PublikationskategoriForskning
Peer review utfördJa