Performance analysis of pilot aided channel estimation methods for MBSFN in LTE system

In this paper, we analyze the performance of the channel estimation methods (LS, LMMSE, ALMMSE) for MBSFN in LTE system. Two methods, with and without linear interpolation, are proposed for extracting the special designed pilot in MBSFN frame. The linear interpolation method is more accurate and complicated while the non-interpolation method, with about 3~7dB performance loss, is comparatively easier for calculation. The performance of MBSFN frame under the condition of non-delay and 1ms delay is analyzed to make our results more reliable. Additionally, our pilot extracting and channel estimation methods are proved feasible by comparing MBSFN and normal frame in LTE system.