Initial synchronization assisted from inherent diversity on LTE sector search process

Jia Chin Lin, Yu Ting Sun

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Estimations of time error and frequency offset upon initial synchronization are investigated in this paper as components of the sector search process in third-generation partnership project (3GPP) long-term evolution (LTE) communications. The proposed system considers intercell interference, inter-carrier interference and multipath fading by exploiting various diversity. A coarse timing alignment is achieved by the acquisition of a primary synchronization sequence. The coarse timing alignment extracts autocorrelation at a long lag of one half of a frame length from the decimated signal at a lower sampling rate by exploiting a differential correlator. Estimations of residual time error and fractional frequency offset are achieved by evaluating the short-lag autocorrelation at an OFDM symbol duration. The estimations utilize 70 cyclic prefixes that are pre-stored in the buffer employed in the aforementioned differential correlator. The estimations can effectively overcome the time variation of the channel that occurs as a result of a Doppler spread. Comprehensive computer simulations are conducted to verify that the proposed technique can effectively overcome inter-cell interference, time-selectivity, and multipath fading, thereby achieving low estimation errors.

原文???core.languages.en_GB???
主出版物標題2015 IEEE Wireless Communications and Networking Conference, WCNC 2015
發行者Institute of Electrical and Electronics Engineers Inc.
頁面299-303
頁數5
ISBN(電子)9781479984060
DOIs
出版狀態已出版 - 17 6月 2015
事件2015 IEEE Wireless Communications and Networking Conference, WCNC 2015 - New Orleans, United States
持續時間: 9 3月 201512 3月 2015

出版系列

名字2015 IEEE Wireless Communications and Networking Conference, WCNC 2015

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???event.eventtypes.event.conference???2015 IEEE Wireless Communications and Networking Conference, WCNC 2015
國家/地區United States
城市New Orleans
期間9/03/1512/03/15

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