Open AccessSuperimposed Pilot Aided Multiuser Channel Estimation for MIMO‐OFDM Uplinks
Author(s) -
Yang Qinghai,
Kwak Kyung Sup
Publication year - 2006
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.06.0206.0045
Subject(s) - orthogonal frequency division multiplexing , channel (broadcasting) , mimo , mimo ofdm , computer science , algorithm , electronic engineering , bit error rate , cramér–rao bound , signal to noise ratio (imaging) , engineering , estimation theory , telecommunications
This letter addresses the superimposed pilot aided multiuser channel estimation for the uplinks of multi‐input multi‐output orthogonal frequency‐division multiplexing systems. To mitigate the embedded‐data effects on the performance of channel estimation, a novel combining algorithm is proposed. Optimal pilot symbols are developed with respect to the least square channel estimate's mean square error. The averaged sum‐capacity lower bound is derived and simulated. Simulation results show that on a low signal‐to‐noise ratio regime, our proposed scheme achieves better performance and higher capacity than the conventional pilot aided approach.