  Binary LDPC coded relay systems have been well studied previously with the
assumption of infinite codeword length. In this paper, we deal with non-binary
LDPC codes which can outperform their binary counterpart especially for
practical codeword length. We utilize non-binary LDPC codes and recently
invented non-binary coding techniques known as multiplicative repetition to
design the low-rate coding strategy for the decode-and-forward half-duplex
relay channel. We claim that the proposed strategy is simple since the
destination and the relay can decode with almost the same computational
complexity by sharing the same structure of decoder. Numerical experiments are
carried out to show that the performances obtained by non-binary LDPC coded
relay systems surpass the capacity of direct transmission and also approach
within less than 1.5 dB from the achievable rate of the relay channels.
