Spatial diversity is an effect method to resist fading effect in wireless channel.Due to the limitation of size
weight and cost
it is difficult to use the multi-antenna technique on the node of wireless sensor networks.A novel coding cooperative communication scheme based on π rotation LDPC codes in WSNs is presented.A virtual multi-antenna system was created by two nodes share their own single antenna.Different parts of LDPC code were transmitted to the base station through different nodes’ uplink channels to obtain diversity gain
the system performance can be improved effectively in the same system bandwidth and transmitting power.