The importance of broadband wireless communication implemented at subway tunnels is growing up. At 18㎓ wireless video transmission system, the transmitter requires a digital modulation method. At subway tunnel, A 18GHz's influence of the multi-pass ...
The importance of broadband wireless communication implemented at subway tunnels is growing up. At 18㎓ wireless video transmission system, the transmitter requires a digital modulation method. At subway tunnel, A 18GHz's influence of the multi-pass padding is strong. OFDM digital modulation that is strong for multi-pass padding is recommended. In this paper, Suitable to a subway wireless video transmission OFDM receiver is designed. OFDM receiver system has 6㏈ gaion because uses diversity of space diversity and MRC(Maximum Ratio Combining) diversity. The transmitter system use C&ITechnologies's transmitter board. IF frequency of receiver is 480㎒. OFDM modulation parameter is as follow, The bandwidth is 8㎒, The numuber of carrier if 2,000, The modulation methode is QAM16, The guard interval is 1/32.