A Novel Low Complexity Cell Search Scheme for LTE Systems

The cell search procedure of the third generation partnership project long term evolution (3GPP LTE) includes the time synchronization, the frequency synchronization of frames, and the acquisition of cell identity (Cell ID). The traditional cell search scheme detects the Cell ID by computing the correlation between the received signal and all transmitted sequences. However, it causes high computational complexity and considerable processing time which effect the delay time of services power on, the standby time, the energy consumption, and the cost of manufacture. This paper firstly proposes a perfect sequence with special structure as preamble, and the sequence is linear combination of two base sequences. In addition, a low complexity cell search scheme, which utilizes the proposed perfect sequence, is then proposed in this paper.