Position-Aided Large-Scale MIMO Channel Estimation for High-Speed Railway Communication Systems

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Tao Li
  • Xiaodong Wang
  • Pingyi Fan
  • Taneli Riihonen

Organisaatiot

  • Tsinghua University
  • Columbia University
  • Shenzen Institutes of Advanced Technology

Kuvaus

We consider channel estimation for high-speed railway communication systems, where both the transmitter and the receiver are equipped with large-scale antenna arrays. It is known that the throughput of conventional training schemes monotonically decreases with the mobility. Assuming that the moving terminal employs a large linear antenna array, this paper proposes a position-aided channel estimation scheme whereby only a portion of the transmit antennas send pilot symbols and the full channel matrix can be well estimated by using these pilots together with the antenna position information based on the joint spatial-temporal correlation. The relationship between mobility and throughput/DoF is established. Furthermore, the optimal selections of transmit power and time interval partition between the training and data phases as well as the antenna size are presented accordingly. Both analytical and simulation results show that the system throughput with the position-aided channel estimator does not deteriorate appreciably as the mobility increases, which is sharply in contrast with the conventional one.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut8964-8978
Sivumäärä15
JulkaisuIEEE Transactions on Vehicular Technology
Vuosikerta66
Numero10
TilaJulkaistu - lokakuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 16965470