抄録
In this paper, CDM is applied to the digital terrestrial broadcasting system based on OFDM. This proposed system could provide both common and local area services by using CDM for local broadcasting. Proposed system can be easily adapted to OFDM digital terrestrial broadcasting system, which proposed by Japanese BST-OFDM ISDB-T, by adding only one spread spectrum block. Moreover, we will get advantages from this adaptation, such as spectrum efficiency, simultaneous common and local area broadcasting. Performance of proposed system is shown that high data rates can be served. Its performance is better than FDM system and better performance can be reached by using sectorization and Walsh codes in proposed system. From results, different multimedia services can be supported by the proposed system that applied in different bandwidths.
