New method of implementation for channel estimation in LTE system based on GPP

Long Term Evolution (LTE) system supports high-speed data transmission, thus high demand for real-time is a challenging and crucial problem. Meanwhile, channel estimation is the important module for the whole physical layer process. In this paper, the Single Instruction Multiple Data (SIMD) technology as a new method for signal processing is applied to implement this module based on general purpose processor (GPP). Through theoretical analysis and comparison between different algorithms for channel estimation, least square (LS) with linear interpolation is adopted to meet the requirement of real-time. The latency of the proposed processing method is evaluated by simulations. The simulation results show that the proposed method is much more efficient than the conventional processing without SIMD.