Device, method and pilot symbol forming method for cell search in orthogonal frequency division multiplexing communication system

The present invention relates to an essential cell search in a mobile communication system of an orthogonal frequency division multiplexing scheme (OFDM) (cell search) method and apparatus. OFDM signals that are normally sent to the receiver of the terminal in each base station is composed of several frames consisting of these symbols and a number of symbols having a predetermined period. In order for the OFDM wireless communication system operating correctly cell check to find the best base station by analyzing the OFDM signals transmitted to the receiver from the various base stations (cell identification) the interface between the border and the frame between the symbols of the OFDM signal transmitted in the selected cells with the process of this synchronization (synchronization) process of finding essential. Said cell search in these series of processes, and the designing of a suitable pilot (pilot) symbols at the transmitter needs to be a method appropriate cell search in the receiver and use this to the device is necessarily required for this purpose. Proposals are many conventional techniques for cell search, but these techniques have inefficient management, vulnerability to multi-cell environment, the difficulties of implementation of the large amount of computation, issues such as vulnerability and high uncertainty about the multi-path channel of pilot symbols have. The present invention proposes such a conventional technique for overcoming the shortcomings of the pilot designing method and a transmitter and by using this method suitable cell search made at the receiving end and its device. OFDM multiple access system, a cell search, synchronization, cell OK