A comparison of time and frequency synchronisation algorithms for the European DVB-T system

In this paper a comparison of several time and frequency synchronisation algorithms for DVB-T is presented. The goal is to achieve a carrier frequency estimate with an error smaller than 1% of the subcarrier spacing and a timing estimate that avoids ISI in the receiver. Three joint coarse timing and fine frequency estimation algorithms are compared, where the results for the simplest one are similar to the ones for the others with more hardware complexity. The best results for coarse carrier frequency offset are obtained with a data-aided (DA) scheme using the fixed pilot tones. A new method is derived for fine timing estimation for one-path channels. Simulations have been performed for the DVB-T 2K system in three different channels.

[1]  Heinrich Meyr,et al.  Frame synchronization of OFDM systems in frequency selective fading channels , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[2]  Yiyan Wu,et al.  Orthogonal frequency division multiplexing: a multi-carrier modulation scheme , 1995 .

[3]  D. C. Cox,et al.  Blind synchronisation for OFDM , 1997 .

[4]  H. Nogami,et al.  A frequency and timing period acquisition technique for OFDM systems , 1995, Proceedings of 6th International Symposium on Personal, Indoor and Mobile Radio Communications.

[5]  Dong-Seog Han,et al.  A New Fast Symbol Timing Recovery Algorithm For Ofdm Systems , 1998, International 1998 Conference on Consumer Electronics.

[6]  Kyungwhoon Cheun,et al.  A New Symbol Timing Recovery Algorithm For OFDM Systems , 1997 .

[7]  Lei Wei,et al.  Requirements of timing and frequency synchronizations for multi-user OFDM on satellite mobile channel , 1994, 1994 IEEE GLOBECOM. Communications: The Global Bridge.

[8]  Per Ola Börjesson,et al.  ML estimation of time and frequency offset in OFDM systems , 1997, IEEE Trans. Signal Process..