發(fā)布時間：2018-06-09 16:59

  本文選題：LTE + 物理層�。� 參考：《東北大學(xué)》2014年碩士論文

【摘要】：LTE(Long Term Evolution)是3G之后無線移動通信的下一代演進(jìn)技術(shù),可以在各種頻譜范圍及操作場景中進(jìn)行部署,可廣泛應(yīng)用于無線通信領(lǐng)域。世界上許多通信運營商已經(jīng)宣稱,將把LTE作為下一代無線通信系統(tǒng)的首選技術(shù)。LTE運用了Turbo編碼、OFDM調(diào)制、MIMO等多種關(guān)鍵技術(shù),使得LTE在編碼效率、帶寬使用效率、傳輸速率等方面的優(yōu)勢突出。隨著英國的沃達(dá)豐、日本NTTDoCoMo、美國ATT和中國移動等世界上最主要的電信運營商對LTE技術(shù)的商用,LTE的理論研究意義和商業(yè)價值也越來越明顯。本設(shè)計采用Altera DE2-115開發(fā)平臺,在FPGA上實現(xiàn)了LTE物理層下行鏈路基帶信號的處理�；鶐盘柕奶幚砜梢苑譃樾诺谰幋a與信道調(diào)制兩部分,信’道編碼包括CRC24(循環(huán)冗余校驗)、Turbo編碼、速率匹配與信道交織等,信道調(diào)制包括加擾、QAM16(正交振幅調(diào)制)調(diào)制、層映射、預(yù)編碼、資源映射和OFDM調(diào)制等處理。本文著重研究了LTE物理層下行共享信道(PDSCH)的處理過程,最終本基帶處理系統(tǒng)可以對1.4Mhz帶寬的基帶信號進(jìn)行編碼和調(diào)制。運用Modelsim軟件對系統(tǒng)的功能進(jìn)行了時序仿真,并且利用Altera公司的Signaltap Ⅱ工具在硬件平臺上進(jìn)行了調(diào)試,分析了板級信號,驗證了基帶信號處理的準(zhǔn)確性。經(jīng)測試證明,本基帶處理系統(tǒng)實現(xiàn)了預(yù)期功能,具有較好的實時性和準(zhǔn)確率,可以作為LTE基帶處理的原型系統(tǒng)。
[Abstract]:Long term Evolution (LTE) is the next generation evolution technology of wireless mobile communication after 3G. It can be deployed in various spectrum range and operation scenario, and can be widely used in wireless communication field. Many communication operators in the world have announced that LTE will be the first choice technology in the next generation wireless communication system. LTE makes use of many key technologies, such as Turbo coding, OFDM modulation and MIMO, to make LTE efficient in coding and bandwidth utilization. The advantages of transmission rate are prominent. With the development of Vodafone, NTT DoCoMo, ATT and China Mobile in the world, the theoretical research and commercial value of LTE are becoming more and more obvious. This design adopts Altera DE2-115 development platform, realizes the physical layer downlink baseband signal processing. The processing of baseband signal can be divided into two parts: Channel coding and channel modulation. Signal 'channel coding includes CRC24 (cyclic redundancy check Turbo coding, rate matching and channel interleaving, etc.) channel modulation includes scrambling QAM16 (orthogonal amplitude modulation) modulation, layer mapping, etc. Pre-coding, resource mapping and OFDM modulation processing. This paper focuses on the processing process of LTE physical layer downlink shared channel PDSCH. Finally, this baseband processing system can encode and modulate the baseband signal with 1.4 MHz bandwidth. The function of the system is simulated with Modelsim software, and the signal tap 鈪，

本文編號：2000459