SUBCARRIER ALLOCATION APPARATUS AND METHOD, SUBCARRIER DE-ALLOCATION APPARATUS AND METHOD IN OFDM SYSTEM

摘要

The present invention relates to a subcarrier allocation apparatus and method, and apparatus and method of the role per subcarrier in an orthogonal frequency division multiple system. ; Subcarrier allocation apparatus according to the present invention is a data sub-carrier after creating the logical index to assign to the physical index, through a specific operation of the logical index and the pilot positions constant converted to intermediate index and guard interval (Guard Interval) of null subcarriers for insertion on the basis of the number of data to the allocated channel to the left and right of the sub-carriers and transmits the converted to the physical index. ; And after the device per subcarrier role according to the present invention converts the null subcarrier to map the physical index in the received logical index first medium in the index for identifying, and it switches to a logical index. At this time, by using the remainder and quotient divided by 9 to map a logical index to a physical index to distinguish between data and pilot. According to the present invention, so to separate the data and the pilot, no need to use the ROM table of the mass has the effect of reducing the size of the hardware. ; OFDM, a subcarrier, the data, pilot, a null (NULL), logical, physical, operation