DEVICE, METHOD AND PILOT SYMBOL FORMING METHOD FOR CELL SEARCH IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM

摘要

The present invention is an essential cell search in a mobile communication system of an orthogonal frequency division multiple (OFDM) scheme (cell search) relates to a method and apparatus. In general, the OFDM signal is transmitted to the receiver of the terminal in each base station is composed of several frames consisting of a number of symbols and symbols having a predetermined period. The boundary between the border and the frame between the symbols of the OFDM signal that is OFDM wireless communication system to operation sent in by analyzing OFDM signals transmitted to the receiver from the various base stations selected cells with a check cell to find the best base station (cell identification) process correctly synchronization (synchronization) finding process is essential. This series of process is called a cell search is a cell search method and apparatus suitable necessarily required in receiver design is required and using them in the proper pilot (pilot) symbols at the transmitter for this purpose. Although many conventional techniques were proposed for the cell search of these techniques have the problems such as inefficient operation and the difficulty of implementation in accordance with the vulnerability, large amount of computation for multi-cell environment, susceptibility to multipath channel, a high uncertainty in the pilot symbol have. In the present invention, and the design method of the pilot and the transmitter to overcome the disadvantages of the conventional techniques by using this cell search, we propose a suitable method and apparatus consisting of a receiving end. ; OFDM multiple access system, a cell search, synchronization, cell OK