Patent ID: 8457076

Claim:
An apparatus for transmitting a random access channel (RACH) signal to a base station in a single carrier-frequency division multiple access (SC-FDMA) system, comprising: a code generator to generate a code sequence for at least one preamble of the RACH signal; a first converting unit to convert the code sequence into a frequency domain code sequence; a mapping unit to map the frequency domain code sequence of the RACH signal to a portion of sub carriers, which are continuous and locally located in an entire frequency band available to the SC-FDMA system, and to allocate a guard band including at least one sub carrier between the frequency domain code sequence and other channel signal bands; a second converting unit to convert the sub carriers to a time domain sequence to be transmitted; a cyclic prefix (CP) inserting unit to insert a CP within the time domain sequence; and a transmitting unit to transmit the time domain sequence.