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Research on Downlink Synchronization and Cell Search for IEEE 802.16e OFDMA Systems

Author: GuoZhenHong
Tutor: YuanDongFeng；SunJian
School: Shandong University
Course: Communication and Information System
Keywords: Orthogonal Frequency Division Multiple Access IEEE802.16e Frame synchronization Frequency Offset Estimation Cell search
CLC: TN929.531
Type: Master's thesis
Year: 2010
Downloads: 50
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Abstract


This paper studies the IEEE802.16e downlink synchronization and multi-cell OFDMA system initial synchronization , and complete the process in accordance with the requirements of the IEEE802.16e OFDMA systems achieve downlink focus on the receiver synchronization the classical algorithm simulation and protocol parameters requested coarse frame synchronization and cell search improvement program . First, a brief review of the the IEEE802.16 standard system and technical characteristics , and a brief introduction of the basic principle of OFDM and OFDMA from theoretical derivation the various synchronization deviation of receiver performance impact , details OFDM synchronization algorithm , and the corresponding the physical layer channel modeling. Then realized the complete process of IEEE802.16e downlink , focusing on analysis of the leading symbol of the structure , and in IEEE 802.16eOFDMA system in the time domain frame detection , small multiple of the frequency offset estimation , thin frame synchronization , integer frequency offset estimate research Schmidl Cox classical algorithm based on the pseudo- cyclical take full advantage of the leading symbol , and the simulation results show that the improved algorithm , to improve the performance of the frame detection . Secondly, we explore the the IEEE802.16e single cell OFDMA system cell search , cell search integer frequency offset estimation scheme for the system , and the program performance simulation , simulation results show that the program can be very good integer frequency offset estimation and identification of cell identity . Finally, the study of the initial synchronization problems of the IEEE802.16e OFDMA system multi- cell , the main analysis from each sector of a base station identification of the cell identification information in the case of overlapping of the cell boundary , in the given and the basis of the simulation of the original algorithm , and for the cell search to be completed within the shortest possible time requirements, proposed a cell search fast algorithm , the algorithm can greatly improve the detection rate of the cell identification , very suitable for the IEEE802.16e OFDMA system .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications > Cellular mobile communications systems (mobile phones, mobile phone handsets ) > Frequency division multiple access (FDMA) mobile communication
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