標題: A Differential Sliding Correlation Scheme for Symbol Timing Detection in Time Domain Synchronous OFDM Systems
作者: Sheu, Chorng-Ren
Huang, Chia-Chi
電信工程研究所
Institute of Communications Engineering
關鍵字: symbol timing detection;PN sequence;carrier frequency offset;multipath;TDS-OFDM
公開日期: 2009
摘要: In this paper, a new symbol timing detection scheme robust to carrier frequency offset is proposed for Time Domain Synchronous (TDS) OFDM systems. The proposed method computes the sliding correlation from both the differential received signal and the differential PN sequence. Rapid symbol timing detection can be obtained based on the correlation peaks. As differential operation is adopted before sliding correlation in the proposed method, the time-dependent linear phase effect caused by the carrier frequency offset will not influence the correlation peaks. Nevertheless, the incorrect correlation peaks caused by the cross terms of the multipath may be detected. An ambiguity protection module is added to validate the correlation peak detection results and further improve the system performance. Our simulation results show that the proposed scheme for symbol timing detection is accurate and simultaneously robust to carrier frequency offset for TDS-OFDM systems in both a time-varying TU6 channel and a fixed two-path channel.
URI: http://hdl.handle.net/11536/134954
ISBN: 978-1-4244-2516-7
期刊: 2009 IEEE VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-5
起始頁: 1482
結束頁: +
Appears in Collections:Conferences Paper