Design And Implmentation Of The Receiver Of TD-LTE Pusch Based On Multi-Core DSP

TD-LTE uplink physical layer includes three physical channels: Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH) and Physical Random Access Channel (PRACH). Physical Uplink Shared Channel carries the uplink data information, the uplink control information and the uplink reference signal.This thesis completed the TD-LTE system PUSCH receiving link design proposal based on six-core MSC8157DSP platform, focusing on the assignment and multicore architecture design tasks. I did the optimization of the channel according to the characteristics of the platform. Meanwhile, the channel’s correctness and stability has been tested by test vector.This thesis proposed a multi-core design scheme of PUSCH. Combining the resources of MSC8157such as the Maple-B2with the TD-LTE system’s time/memory requirements, the paper arranged all the six-core tasks reasonably. There is a detailed description of its multi-core scheduling for PUSCH in the paper. Meanwhile, I studied many multicore communications mechanisms.This thesis schemed and algorithmed optimization of the PUSCH has been done in the paper. According to the process of PUSCH in the protocol, I designed the algorithms and did the optimization. Channel estimation module adopted VCFR algorithm, channel equalization module used the table-matching method, demodulation module adopted data parallel processing and32-bit packaging was used in the scrambler generated module and so on. All of the work promoted the system’s performance. This thesis completed the implementation of the PUSCH receiving link and verified the channel by test vetor based on MSC8157platform. After the C code has been done, I did the optimization of all the modules. Channel equalization module’s processing time fell from3ms to98us, demodulation module’s processing time fell from3ms to800us. And the link has been tested with a single user and multi-users, the validity and stability of the system is verified.This thesis achieved the system design goals. And it had practical value in the actual application of TD-LTE system.