中国邮电高校学报(英文) ›› 2009, Vol. 16 ›› Issue (3): 19-23.doi: 10.1016/S1005-8885(08)60221-6
张炎炎,张建华, HUANG Jiang-chun, ZHANG Ping
ZHANG Yan-yan, ZHANG Jian-hua, HUANG Jiang-chun, ZHANG Ping
摘要:
In orthogonal frequency division multiplexing (OFDM) systems, time and frequency synchronization are two critical elements for guaranteeing the orthogonality of OFDM subcarriers. Conventionally, with the employment of pseudonoise (PN) sequences in preamble design, the preamble information is not fully utilized in both symbol timing offset acquisition and carrier frequency offset estimation. In this article, a new synchronization algorithm is proposed for jointly optimizing the time and frequency synchronization. This algorithm uses polynomial sequences as synchronization preamble instead of PN sequences. Theoretical analysis and simulation results indicate that the proposed algorithm is much more accurate and reliable than other existing methods.