SC-FDMA LTE Performance Through High Altitude Platforms Communications Channel
Abstract: It is known that
HAPS is one of the promising wireless infrastructures in the years to come.
HAPS exploit many advantages from cellular satellite system as well as from
cellular terrestrial system. Therefore, HAPS is envisaged as a novel technology
for communication. This paper aims at evaluating the performance of a
pilot-based channel estimation for uplink LTE using SC-FDMA over Ricean HAPS
communication channel. Pilot-based channel estimation is used to estimate an
uplink channel of LTE users who transmit the data to HAPS as a base transceiver
station (BTS). Analysis is performed to determine the effect of users elevation
angle with respect to user position inside HAPS coverage, LTE channel
bandwidth, modulation type, and the Doppler frequency shift effect. We found
that user’s elevation angle contribute major effect to the pilot-based channel
estimation of LTE SC-FDMA performance. System capability to overcome fading
effect that users with low elevation angle would be needed to increase the
performance. In particular to keep an acceptable performance, in this paper we
compensate the channel bandwidth, changing modulation type, and limit the
Doppler effect through vehicle speed limitation.
Keywords: Long Term Evolution,
SC-FDMA, High Altitude Platforms, pilot-based channel estimation, Ricean fading
channel
Author: Iskandar, D. Hidayat
Journal Code: jptkomputergg160199
