TD-LTE下行物理信道资源解映射的研究与FPGA的实现
发布时间：2018-10-16 19:26
【摘要】：随着无线通信技术的发展、人们对通信行业的强烈需求以及国内三大运营商的激烈竞争,3GPP组织正式启动了LTE(长期演进)项目。在TD-LTE系统中,解资源映射技术在终端正确接收信号、解码以及整个系统的稳定性和高性能上尤为关键。TD-LTE系统拥有灵活的帧结构配置、可变的系统带宽、二维结构的时频域资源块,同时采用以OFDM技术为基础的多址方式。但这同时也提高了终端从帧结构上分离各个物理信道和信号以及还原各自数据的难度,因此需要对TD-LTE下行解资源映射进行研究,设计与实现一种稳定和高性能的解资源映射方案:首先,对LTE的R10协议物理层中下行的五个物理信道和信号进行了介绍,并对资源解映射时需要的帧结构、时隙结构和物理资源等概念进项了阐述,给出了物理层下行信道处理的一般过程。其次,给出了五个物理信道资源解映射的整体流程,并分别给出了五个信道的资源解映射方案,对五个物理信道的资源解映射过程进行仿真,计算了每个信道的映射位置,提取了一个子帧中五个信道的全部数据。之后,对整个解映射模块的可靠性和稳定性进行测试。最后,根据资源解映射方案给出了对应的FPGA实现方案。将资源解映射模块分为五个部分:PBCH资源解映射模块、PCFICH资源解映射模块、PDCCH资源解映射模块、PDSCH资源解映射模块和PHICH资源解映射模块,给出了每个模块的仿真波形图,之后,对五部分进行联合仿真。
[Abstract]:With the development of wireless communication technology, the strong demand for the communication industry and the fierce competition among the three major domestic operators, the 3GPP organization officially launched the LTE (long-term evolution) project. In TD-LTE system, resource mapping technology is very important in receiving signal correctly, decoding, stability and high performance of the whole system. TD-LTE system has flexible frame configuration and variable system bandwidth. The time-frequency domain resource block of two-dimensional structure is based on OFDM technology. However, this also makes it more difficult for the terminal to separate the physical channels and signals from the frame structure and restore their respective data. Therefore, it is necessary to study the downlink resource mapping of TD-LTE. This paper designs and implements a stable and high-performance solution to resource mapping. Firstly, five downlink physical channels and signals in the physical layer of R10 protocol of LTE are introduced, and the frame structure needed for resource unmapping is also discussed. The concepts of slot structure and physical resources are described, and the general process of downlink channel processing in physical layer is given. Secondly, the whole flow of resource unmapping of five physical channels is given, and the resource unmapping schemes of five channels are given respectively. The process of resource unmapping of five physical channels is simulated, and the mapping position of each channel is calculated. All the data of five channels in a subframe are extracted. Finally, the corresponding FPGA implementation scheme is given according to the resource unmapping scheme. The resource unmapping module is divided into five parts: PBCH resource unmapping module, PCFICH resource unmapping module, PDCCH resource unmapping module, PDSCH resource unmapping module and PHICH resource unmapping module. The simulation waveform diagram of each module is given. Five parts of the joint simulation.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;TN791
本文编号：2275396
[Abstract]:With the development of wireless communication technology, the strong demand for the communication industry and the fierce competition among the three major domestic operators, the 3GPP organization officially launched the LTE (long-term evolution) project. In TD-LTE system, resource mapping technology is very important in receiving signal correctly, decoding, stability and high performance of the whole system. TD-LTE system has flexible frame configuration and variable system bandwidth. The time-frequency domain resource block of two-dimensional structure is based on OFDM technology. However, this also makes it more difficult for the terminal to separate the physical channels and signals from the frame structure and restore their respective data. Therefore, it is necessary to study the downlink resource mapping of TD-LTE. This paper designs and implements a stable and high-performance solution to resource mapping. Firstly, five downlink physical channels and signals in the physical layer of R10 protocol of LTE are introduced, and the frame structure needed for resource unmapping is also discussed. The concepts of slot structure and physical resources are described, and the general process of downlink channel processing in physical layer is given. Secondly, the whole flow of resource unmapping of five physical channels is given, and the resource unmapping schemes of five channels are given respectively. The process of resource unmapping of five physical channels is simulated, and the mapping position of each channel is calculated. All the data of five channels in a subframe are extracted. Finally, the corresponding FPGA implementation scheme is given according to the resource unmapping scheme. The resource unmapping module is divided into five parts: PBCH resource unmapping module, PCFICH resource unmapping module, PDCCH resource unmapping module, PDSCH resource unmapping module and PHICH resource unmapping module. The simulation waveform diagram of each module is given. Five parts of the joint simulation.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.5;TN791
【参考文献】
相关硕士学位论文 前1条
1 陈亮明;LTE下行信道估计技术研究及下行链路设计[D];武汉理工大学;2012年
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