An Improved CIR-Based STR Scheme for MISO Mode in DVB-T2 System

We propose an improved CIR(Channel Impulse Response)-based fine STR(Symbol Timing Recovery) scheme for multi-input single-output (MISO) transmission mode of DVB-T2 system. At first, we present an efficient method to estimate the CIRs of MISO transmission. Then, the effective method for resolving the ambiguity of CIR is proposed by categorizing the ambiguity effect under the assumption of a false coarse STO(Symbol Timing Offset) and by changing the starting point of FFT window successively. Simulation results show that the proposed fine STR achieves the fine synchronization without an inter-symbol interference(ISI) in the large delay channels causing the ambiguity effect of CIR.

[1]  Xianbin Wang,et al.  A channel characterization technique using frequency-domain pilot time-domain correlation method for DVB-T systems , 2003, 2003 IEEE International Conference on Consumer Electronics, 2003. ICCE..

[2]  C.-C. Jay Kuo,et al.  Synchronization Techniques for Orthogonal Frequency Division Multiple Access (OFDMA): A Tutorial Review , 2007, Proceedings of the IEEE.

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

[4]  H. Meyr,et al.  Optimum Receiver Design for OFDM-Based Broadband Transmission — Part II : A Case Study , 2001 .

[5]  Heinrich Meyr,et al.  Optimum receiver design for wireless broad-band systems using OFDM. I , 1999, IEEE Trans. Commun..

[6]  Meng-Han Hsieh,et al.  Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels , 1998 .

[7]  Lin Yang,et al.  A combined code acquisition and symbol timing recovery method for TDS-OFDM , 2003, IEEE Trans. Broadcast..

[8]  A.I. Bo,et al.  Symbol synchronization technique in COFDM systems , 2004, IEEE Transactions on Broadcasting.

[9]  Dae-Ki Hong,et al.  A timing recovery for return channel of digital video broadcasting , 2002, 2002 Digest of Technical Papers. International Conference on Consumer Electronics (IEEE Cat. No.02CH37300).

[10]  Donald C. Cox,et al.  Mathematical analysis of the impact of timing synchronization errors on the performance of an OFDM system , 2006, IEEE Transactions on Communications.

[11]  Heinrich Meyr,et al.  Optimum receiver design for OFDM-based broadband transmission .II. A case study , 2001, IEEE Trans. Commun..

[12]  D. C. Cox,et al.  Effect of frame synchronization errors on pilot-aided channel estimation in OFDM: analysis and solution , 2002, The 5th International Symposium on Wireless Personal Multimedia Communications.