Timing recovery for OFDM transmission

@article{citeulike:2002922, abstract = {Orthogonal frequency division multiplexing (OFDM) is an effective modulation technique for high-rate and high-speed transmission over frequency selective fading channels. However, OFDM systems can be extremely sensitive and vulnerable to synchronization errors. In this paper, we present a scheme for performing timing recovery that includes symbol synchronization and sampling clock synchronization in OFDM systems. The scheme is based on pilot subcarriers. In the scheme, we use a path time delay estimation method to improve the accuracy of the correlation-based symbol synchronization methods, and use a delay-locked loop (DLL) to do the sampling clock synchronization. It is shown that by using this scheme, the mean square values of the symbol timing estimation error can be decreased by several orders of magnitude compared to the common correlation methods in both the AWGN and multipath fading channels. In addition, the scheme can track the symbol timing drift caused by the sampling clock frequency offsets}, author = {Yang, Baoguo and Letaief, K. B. and Cheng, R. S. and Cao, Zhigang }, booktitle = {Selected Areas in Communications, IEEE Journal on}, citeulike-article-id = {2002922}, doi = {10.1109/49.895033}, journal = {Selected Areas in Communications, IEEE Journal on}, keywords = {ofdm, synchronization, time}, number = {11}, pages = {2278--2291}, posted-at = {2007-11-28 10:49:52}, priority = {2}, title = {Timing recovery for OFDM transmission}, url = {http://dx.doi.org/10.1109/49.895033}, volume = {18}, year = {2000} }

TY - JOUR ID - citeulike:2002922 L3 - citeulike-article-id:2002922 TI - Timing recovery for OFDM transmission T2 - Selected Areas in Communications, IEEE Journal on JF - Selected Areas in Communications, IEEE Journal on VL - 18 IS - 11 SP - 2278 EP - 2291 N2 - Orthogonal frequency division multiplexing (OFDM) is an effective modulation technique for high-rate and high-speed transmission over frequency selective fading channels. However, OFDM systems can be extremely sensitive and vulnerable to synchronization errors. In this paper, we present a scheme for performing timing recovery that includes symbol synchronization and sampling clock synchronization in OFDM systems. The scheme is based on pilot subcarriers. In the scheme, we use a path time delay estimation method to improve the accuracy of the correlation-based symbol synchronization methods, and use a delay-locked loop (DLL) to do the sampling clock synchronization. It is shown that by using this scheme, the mean square values of the symbol timing estimation error can be decreased by several orders of magnitude compared to the common correlation methods in both the AWGN and multipath fading channels. In addition, the scheme can track the symbol timing drift caused by the sampling clock frequency offsets KW - ofdm KW - synchronization KW - time AU - Yang, Baoguo AU - Letaief, KB AU - Cheng, RS AU - Cao, Zhigang PY - 2000/// UR - http://dx.doi.org/10.1109/49.895033 ER -