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| Research about the ofdm-based digital broadcasting system model and decision about the number of the total subcarriers |
| Shu Feng; Zhao Guangling; Wu Lenan |
| Dept. of Radio Engineering Southeast University Nanjing 210096 China |
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Abstract As time-variant multipath channels, the time-variant property of MW and SW channels causes the interchannel interfere (ICI) between different subchannels of OFDM-based digital amplitude modulation broadcasting (DAMB) system. In this paper, the OFDM system model is analyzed in MW and SW channels, and ICI due to time-variant channel is formulated. Finally, by computer simulation, the maximum number of the total subcarrier in OFDM system is estimated under the condition that ICI is much smaller compared to signal. This value is very important for the DAMB system.
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Received: 08 November 2001
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2003, Vol. 25 
