Implementation of TD-LTE Downlink Channel Estimation Based on DSP

The implementation based on DSP (Digital Signal Processor) plays an important role in the LTE protocol development. Firstly, this paper introduces the generation process and mapping location of time-frequency of cell-specific reference signals and chooses LS algorithm to carry on the channel estimation after weighed the DSP implementation complexity and algorithm performance. Secondly, describes the design and implementation of the channel estimation key modules in the perspective of memory allocation, operation cycles and competition accuracy. Finally, the performance analysis and BER results show that the proposed scheme can not only meet the requirements of real-time processing but also provide superior performance.