Title :
Timing errors analysis of OFDM systems based on joint Cyclic-prefix and postfix
Author :
Seirafian, Amir ; Vakily, Vahid Tabataba
Author_Institution :
Dept. of Electr. Eng., Iran Univ. of Sci. & Technol., Tehran, Iran
Abstract :
OFDM systems are sensitive to timing synchronization errors that refers to incorrect detection of the start position of an OFDM symbol. In this paper, first by considering cyclic-prefix (CPre) as a guard interval, formulas for various types of signal-to-interference (SIR) ratio in terms of timing errors are presented. Further we utilize CPre and Cyclic-postfix (CPost) jointly as a guard interval, and draw new SIR formulas. The simulations are performed in three different channels for DAB systems. As a result without any loss in bandwidth efficiency, the performance of DAB systems (based on joint CPre and CPost) would be more increased.
Keywords :
OFDM modulation; error analysis; synchronisation; DAB system; OFDM symbol; cyclic prefix; digital audio broadcasting; orthogonal frequency division multiplexing; signal to interference ratio; timing error analysis; timing synchronization error; IP networks; Interference; Joints; OFDM; Simulation; Synchronization;
Conference_Titel :
Signal Processing Algorithms, Architectures, Arrangements and Applications, 2007
Conference_Location :
Poznan
Print_ISBN :
978-1-4244-1514-4
Electronic_ISBN :
978-1-4244-1515-1
DOI :
10.1109/SPA.2007.5903304
