Research, Implementation And Optimization Of LTE PUSCH Processing

The LTE system raised by 3GPP is the hottest standard of the next genernation wireless communication technology currently, and it's a transition from 3G to 4G system. LTE uses OFDMA in the downlink and SC-FDMA in the uplink. As for the SC-FDMA technology, it solved the problem of PAPR brought by OFDM. Because of the high data rate LTE could bring in, it's widely supported by the operators.The thesis, it mainly did research on the implementation and the optimization of the algorithm in LTE PUSCH.The thesis first introduced the backgroud of LTE and the technology on the physical layer, then it did research in every process of PUSCH which included the channel coding,the modulation, the baseband signal generation and the reference signal generation.And then the thesis introduced the hardware frame and the function splitting for implementing the algorithm of PUSCH. Moreover, it did analyze on the time constrain of the system which indicated the time goal for DSP processing on PUSCH. Because of the complexity of PUSCH processing, standard algorithm of LTE PUSCH couldn't fulfill the time constrain. Then here come four optimal algorithm for DSP processing including CRC coding, Turbo coding, ratematch and reference signal generation. The key thoughts included using look-up table and interation.At last, the thesis introduced the whole processing flow of DSP algorithm on PUSCH and the calculation time testing of the algorithm on DSP C6455. The result showed that the optimal algorithm not noly fulfilled the time constrain, but also got a large performance gain than the original.