Performance improvement of turbo coded multi-route multi-hop networks using parity check codes

Wireless multi-hop networks are promising techniques for next generation wireless communications. Multi-hop networks have large channel capacity and can achieve multi-route transmissions. By using multi-route transmissions, we can obtain a route diversity effect at the destination nodes. In order to enhance the diversity effect, we usually adopt forward error correction techniques. Forward error correction techniques and turbo codes effectively work against severe wireless environment including fading channels. The iterative turbo decoder requires accurate channel information to achieve good decoding performance. In multi-hop transmissions, however, the receiver usually measures only the channel information of the last hop and it does not know the channel information of the whole route. In this paper, we propose the turbo coded multi-route multi-hop networks using parity check bits. By using parity bits, we can easily estimate the whole channel information in multi-route multi-hop networks. Using numerical examples, we show that the proposed scheme improves the performance in the fast fading channel conditions.