TY - GEN
T1 - An improved channel estimation method for LTE downlink system
AU - Wang, Yufeng
AU - Zhang, Xiujun
AU - Xiao, Limin
AU - Zeng, Jie
AU - Zhao, Ming
AU - Chen, Xiang
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2016/1/6
Y1 - 2016/1/6
N2 - Due to the limitation of Cell-specific Reference Signals (CRS), the channel estimation for LTE downlink system is a challenging topic, especially for vehicular users at high speed suffering from severe fading. In this paper, an improved channel estimation method with downlink channel signaling aided detection is proposed for LTE downlink system. The considered specific signaling symbols include the Physical Control Format Indicator Channel (PCFICH) and the Physical Hybrid-ARQ Indicator Channel (PHICH). By traditional Least Square (LS) estimation and Wiener interpolation, the additional channel estimations by the above PCFICH and PHICH are combined with the results of CRS to obviously enhance the estimation accuracy, accordingly to improve system performance. The effectiveness of the proposal for different system bandwidths in LTE is analyzed, meanwhile the complexity is evaluated. Since each vehicular user assigned with several subcarriers can be regarded as a narrower bandwidth system, some numerical simulations are finally provided to verify the proposal, especially performance improvements for narrower bandwidth systems.
AB - Due to the limitation of Cell-specific Reference Signals (CRS), the channel estimation for LTE downlink system is a challenging topic, especially for vehicular users at high speed suffering from severe fading. In this paper, an improved channel estimation method with downlink channel signaling aided detection is proposed for LTE downlink system. The considered specific signaling symbols include the Physical Control Format Indicator Channel (PCFICH) and the Physical Hybrid-ARQ Indicator Channel (PHICH). By traditional Least Square (LS) estimation and Wiener interpolation, the additional channel estimations by the above PCFICH and PHICH are combined with the results of CRS to obviously enhance the estimation accuracy, accordingly to improve system performance. The effectiveness of the proposal for different system bandwidths in LTE is analyzed, meanwhile the complexity is evaluated. Since each vehicular user assigned with several subcarriers can be regarded as a narrower bandwidth system, some numerical simulations are finally provided to verify the proposal, especially performance improvements for narrower bandwidth systems.
KW - LTE downlink
KW - channel estimation
KW - signaling demodulation
UR - https://www.scopus.com/pages/publications/84978380785
U2 - 10.1109/APCAP.2015.7374458
DO - 10.1109/APCAP.2015.7374458
M3 - Conference contribution
AN - SCOPUS:84978380785
T3 - Proceedings of the 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation, APCAP 2015
SP - 480
EP - 484
BT - Proceedings of the 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation, APCAP 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 4th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2015
Y2 - 30 June 2015 through 3 July 2015
ER -