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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
Based on the principle of Trellis Code Modulation(TCM), we suppose a new scheme and Space Time Coding technology in OFDM system. Space time block coding (STBC) is applied as and inner coding to ensure the spatial diversity and TCM as the out coding to obtain coding gain. Simulation is carried on SUI-3 channel model, the method of channel estimation is also improved as well. The results show that the bit error rate (BER) can be great reduce by this improved hybrid scheme, and greater coding gain can be obtained without increase the bandwidth.