Title :
A time-frequency synchronization algorithm free of ISI for Hpi system
Author :
Ma, Zhangyong ; Kim, Young-il
Author_Institution :
Portable Internet system research team, Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
OFDM system performance is more sensitive to frequency offset and timing error than single-carrier systems. The paper presents a new algorithm which makes use of the autocorrelation characteristics of the pseudo sequence (PN-sequence) to improve the accuracy of the frequency offset and timing error based on the special pilot pattern. Intersymbol-interference (ISI) can be removed only if the correct parameters are chosen. The theoretical analysis and simulation results verify the robustness to multipath of this algorithm.
Keywords :
OFDM modulation; correlation methods; intersymbol interference; multipath channels; synchronisation; timing; ISI; OFDM system; PN-sequence; autocorrelation characteristics; frequency offset; intersymbol-interference; multipath; pilot pattern; pseudo sequence; single-carrier systems; time-frequency synchronization algorithm; timing error; Algorithm design and analysis; Analytical models; Autocorrelation; Frequency synchronization; Intersymbol interference; OFDM; Robustness; System performance; Time frequency analysis; Timing;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400337
