TD-LTE下行物理信道資源解映射的研究與FPGA的實現(xiàn)
發(fā)布時間：2018-10-16 19:26
【摘要】：隨著無線通信技術(shù)的發(fā)展、人們對通信行業(yè)的強烈需求以及國內(nèi)三大運營商的激烈競爭,3GPP組織正式啟動了LTE(長期演進)項目。在TD-LTE系統(tǒng)中,解資源映射技術(shù)在終端正確接收信號、解碼以及整個系統(tǒng)的穩(wěn)定性和高性能上尤為關(guān)鍵。TD-LTE系統(tǒng)擁有靈活的幀結(jié)構(gòu)配置、可變的系統(tǒng)帶寬、二維結(jié)構(gòu)的時頻域資源塊,同時采用以O(shè)FDM技術(shù)為基礎(chǔ)的多址方式。但這同時也提高了終端從幀結(jié)構(gòu)上分離各個物理信道和信號以及還原各自數(shù)據(jù)的難度,因此需要對TD-LTE下行解資源映射進行研究,設(shè)計與實現(xiàn)一種穩(wěn)定和高性能的解資源映射方案:首先,對LTE的R10協(xié)議物理層中下行的五個物理信道和信號進行了介紹,并對資源解映射時需要的幀結(jié)構(gòu)、時隙結(jié)構(gòu)和物理資源等概念進項了闡述,給出了物理層下行信道處理的一般過程。其次,給出了五個物理信道資源解映射的整體流程,并分別給出了五個信道的資源解映射方案,對五個物理信道的資源解映射過程進行仿真,計算了每個信道的映射位置,提取了一個子幀中五個信道的全部數(shù)據(jù)。之后,對整個解映射模塊的可靠性和穩(wěn)定性進行測試。最后,根據(jù)資源解映射方案給出了對應(yīng)的FPGA實現(xiàn)方案。將資源解映射模塊分為五個部分:PBCH資源解映射模塊、PCFICH資源解映射模塊、PDCCH資源解映射模塊、PDSCH資源解映射模塊和PHICH資源解映射模塊,給出了每個模塊的仿真波形圖,之后,對五部分進行聯(lián)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.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN929.5;TN791
本文編號：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.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN929.5;TN791
【參考文獻】
相關(guān)碩士學位論文 前1條
1 陳亮明;LTE下行信道估計技術(shù)研究及下行鏈路設(shè)計[D];武漢理工大學;2012年
，本文編號：2275396
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