Open AccessTime‐interpolated channel estimation for increasing channel capacity of superimposed training‐based precoding schemes
Author(s) -
Kim Byung Wook,
Jung SungYoon
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2014.0604
Subject(s) - precoding , channel (broadcasting) , computer science , estimation , zero forcing precoding , algorithm , channel capacity , training (meteorology) , statistics , mathematics , telecommunications , mimo , geography , engineering , meteorology , systems engineering
This study proposes a time‐interpolated channel estimation method for the superimposed training‐based precoding scheme in slowly time‐varying channels. The regular inclusion of a superimposed training sequence, which is necessary for explicit time‐varying channel estimation, reduces the power allocated to information transmission. Therefore time‐interpolated channel estimation, where the transmission without a superimposed training symbol is performed during a few coherence times, makes very efficient use of transmitting power and possible gains in terms of capacity. A closed‐form solution of the periodicity of time‐interpolated channel estimation was derived using this method together with a Markov channel model. The simulation results confirmed that the use of the time‐interpolated channel estimation method improves the performance of channel capacity and possibly provides energy savings for mobile terminals.