Synchronization, Cell Identification and Channel Estimation Schemes in LTE-A System Downlink

• Main Authors: Shu, Yung-Lin, 徐永霖
• Other Authors: Li, Chi-Min
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/32228587476907297691

碩士 === 國立臺灣海洋大學 === 通訊與導航工程學系 === 103 === This thesis focuses on the LTE-A system synchronization, cell identification (cell-ID) and channel estimation in the time-dispersive multipath channel environment. Synchronization can be grouped into two parts, one part is time offset (TO) and the other is carrier frequency offset (CFO). When it comes to CFO, it is separated into two parts: integer carrier frequency offset (ICFO) and fractional carrier frequency offset (FCFO). In LTE-A , there are two synchronization signals can be utilized to detect TO and CFO - Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS). The cell-ID consists of Cell-ID1 and Cell-ID2. The information of Cell-ID2 is within the PSS, and both Cell-ID1 and Cell-ID2 information are contained in SSS. The proposed schemes in this thesis use PSS properties to detect TO, FCFO, joint detection cell-ID2 and ICFO and channel response. In the multipath channel, lots of PSS symmetric property will be destroyed. The new proposed schemes dedicate to reduce and ease the channel effect, and finally estimate the channel response. Compared with the conventional detection schemes, the proposed schemes have better performance and lower computational complexity advantage in time-dispersive channel scenarios.