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| A Generation Method of Complementary Convolutional Codes for In-band On-channel Digital Audio Broadcasting |
| Yu Yun-hua①②; Shi Yin① |
| ①Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 China;②College of Info, and Control Eng., University of Petroleum,Dongying 257061 China |
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Abstract This paper proposes a class of convolutional codes based on complementary structure to cancel the First-Adjacent Channel(FAC) interference in FM In-band On-channel Digital Audio Broadcasting(FM IBOC DAB) system. Those complementary convolutional codes, which are transmitted by frequency diversity scheme, can effectively deal with the problem in situations where the transmitted data may be lost or severely damaged. The simulation results and analysis show that complementary codes combining scheme yields a better result of 1-2 dB asymptotic code gain than identical codes combining scheme.
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Received: 15 December 2003
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2005, Vol. 27 
