Implementation of LTE TDD uplink transformation deprecoding based on DSP
基于DSP的LTE TDD上行解传输预编码实现

In the TD-LTE (time division-long term evolution) system, Located DFT-Spread OFDM has been adopted in Uplink Transmission. According to the limitation of the length of IDFT sequence by 3GPP protocol, compared with a variety of performance of DFT/IDFT algorithms by simulating,this paper adopts a method of combining FFT algorithm based on 2-N point with symbol selecting of linear interpolation by evaluation of hardware performance and implementing complexity, and proposes an implementing scheme. Firstly, conjugate every troops of the sequence after equalization, then Fast Fourier transform it by adopting algorithm based on 2-N point and selecting the symbol by linear interpolating. Implementing flow chart and the efficiency of algorithm executing are presented, and feasibility and effectiveness of the proposed scheme is verified through the analysis of implementing complexity.