The application of interleaver in the multilevel coding system over the Rayleigh fading channel

We research block multilevel coding (MLC) with different interleavers, which are bit interleaver and symbol interleaver, for the Rayleigh fading channel. These schemes are both based on Ungerbock partitioning. We construct schemes that follow the capacity rule to show that there is optimum trade-off between power and bandwidth efficiency. By computer simulation, it is shown that the MLC with bit interleaver can gain 2 dB, whereas with symbol interleaver there is no difference compared to the MLC without interleaver.