In a relay network, mobility makes the entire set of channels time selective. With appropriate detection strategies that utilize partial CSI, performance improvement can be obtained over a complete non-coherent detection. Due to the multipath channel there is some inter-symbol interference (ISI) in the received signal. Therefore a signal detector (like MLSE or MAP) needs to know channel impulse response (CIR) characteristics to ensure successful equalization (removal of ISI). The channel estimation depicts that type of modulation not improves the spectral efficiency when speed became rise. It means that ICI will increase. In this work, channel estimation is implemented as an accelerator for LTE modem platforms to handle real-time channel estimation with different antenna con?gurations and mobility. And steady offset parameters, which produce ICI, lead to effected on channel performance. In this paper we analyze different approaches of channel estimation, like Least-squares (LS) or Linear Minimum Mean Squared Error (LMMSE) method. We presented many configuration antennas and used MMSE to increase data rate, which led to increase channel estimation and reduce ISI.
Al-Zayadi Haider Abbas, Klymash Mykhailo Mykolayovych, Lavriv Orest Andriyovych, Al-Shuraifi Mushtaq Mobility Affected on Channel Estimation Using Different Modulation in LTE // Проблеми телекомунікацій, Vol. 2014, Issue 2, 2014, pp. 30-41