naa a22 4500 510795404 CHVBK 20180411083334.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11277-012-0621-7 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0621-7 Non-Data-Aided Timing Acquisition for Asynchronous IDMA Systems [Elektronische Daten] [Zhao Wang, JianHao Hu, XingZhong Xiong, Jie Song] Sample-timing error can cause significant performance degradation for the interleave-division multiple-access systems (Wang etal. 2009). In this paper, we propose a non-data-aided timing acquisition scheme to mitigate sample-timing error due to the asynchronous transmission of random allocated user ends (UEs) on the uplink. A closed-loop timing control scheme is constructed for the asynchronous IDMA system in this paper. We use the extrinsic information generated during the iterative detection algorithm with signal noise ratio evolution to estimate the timing offset for the asynchronous uplink in the base station (BS) receiver. The BS receiver returns the timing control bits, which is generated with estimated timing offsets, to the corresponding UE. And the UE uses the timing control bits to adjust local transmission time to guarantee the sampling performance at the BS receiver. The simulation results show that the proposed acquisition scheme based on feedback loop can provide high acquisition probability and low false alarm probability. The proposed scheme can overcome the bit-error-rate performance bottleneck, which is caused by the sample-timing error in BS receiver due to the asynchronous signals in the uplink. Springer Science+Business Media, LLC., 2012 IDMA nationallicence Sample-timing error nationallicence SNR evolution nationallicence Non-data-aided nationallicence Timing acquisition nationallicence Wang Zhao National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut Hu JianHao National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut Xiong XingZhong National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut Song Jie National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/2(2013-03-01), 957-978 0929-6212 69:2<957 2013 69 11277 https://doi.org/10.1007/s11277-012-0621-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0621-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Zhao National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut NATIONALLICENCE 700 1- Hu JianHao National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut NATIONALLICENCE 700 1- Xiong XingZhong National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut NATIONALLICENCE 700 1- Song Jie National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/2(2013-03-01), 957-978 0929-6212 69:2<957 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer