The general relationship in trellis complexity between two dimensional product codes and its component codes is proved and the trellisdesign of product codes is analyzed.
证明了二维乘积码与其分量码的网格图复杂度之间的一般关系，并分析了二维乘积码的网格图的设计。
2
The BER performance of rate 2/3 trellis coded 8DPSK OFDM over time dispersive channels is simulated. The design of trellis codes at different carriers numbers of OFDM is discussed.