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A Synchronization & Cell Searching Technique for OFDM-based Cellular Systems  

Kim Kwang-Soon (한국전자통신연구원 이동통신연구소 무선전송기술연구부 무선전송방식 연구팀)
Kim Sung-Woong (중앙대학교 전자전기 공학부 디지탈통신 연구실)
Chang Kyung-Hi (인하대학교 정보통신대학원)
Cho Yong-Soo (중앙대학교 전자전기 공학부 디지탈통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.1A, 2004 , pp. 65-76 More about this Journal
Abstract
In this paper, a novel preamble structure, including a synchronization preamble and a cell search preamble, is proposed for OFDM-based cellular systems. An efficient algorithm for downlink synchronization and cell searching using the preamble is also proposed. The synchronization process includes the initial symbol timing estimation using continuously, or at least, periodically transmitted downlink signal, frame synchronization, the fine symbol timing estimation, and the frequency offset estimation using the synchronization preamble, and the cell identification using the cell searching preamble. Performance of each synchronization and cell searching step is analyzed and the analytic results including the overall performance of the synchronization and cell searching are verified by computer simulation. It is shown that the proposed preamble with the corresponding synchronization and cell searching algorithm can provide very robust synchronization and cell searching capability even in bad cellular environments.
Keywords
Cellular; OFDM; Cell Search; Preamble; Synchronization;
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