A multiple guard interval based frequency error detector for OFDM systems

We, deal with the carrier frequency synchronization of the orthogonal frequ ency division multiplexing (OFDM) system and propose a multiple guard inter val based frequency error detector (GIB FED) using a set of consecutive gua rd interval data for OFDM system. We compare the performance of a multiple GIB FED with two conventional GIB FEDs. Under two-ray multipath fading chan nel, it is shown that the normalized frequency jitter of the proposed multi ple GIB FED is about 2.1 similar to 4.9 times lower than that of GIB-I FED and 1.2 similar to 2.1 times lower than that of GIB-II FED. The acquisition time of multiple GIB FED is also about 1.8 and 3.2 times faster than those of GIB-I FED and GIB-II FED, respectively, regardless of channel condition .