APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING UPLINK RANDOM ACCESS CHANNEL IN OFDMA MOBILE COMMUNICATION SYSTEM

摘要

The present invention relates to an apparatus and method for transmitting and receiving a random access channel (Random Access Channel) signal in a wireless communication system for dividing an entire frequency band of the uplink into M subbands. The transmitter device according to the invention, the generator for generating an access code, a predetermined adjacent sub-carriers of the sub-band access division codes to the M sub-blocks, corresponding to each of the M sub-blocks from the generator sub-carrier allocation unit for outputting assigned to the transform data inverse fast Fourier from the sub-carrier allocator: and IFFT processor (IFFT inverse Fourier transform) to which outputs an OFDM symbol, a given first part of the OFDM symbol from the IFFT processor the repeater repeats, including generating the random access channel signal. This invention, not only can improve the TOA and received power estimation performance of the uplink signal, since it can accurately estimate the channel quality to some extent of each sub-band, the uplink DCA (Dynamic Channel Allocation) in an OFDMA system It has the advantage that it can be easily applied. ; OFDMA, the uplink, a random access channel, ranging channel, a dynamic channel assignment