Spatial diversity is an effective 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 terminal of wireless communication.Cooperative communication allows the mobile terminals with a single-antenna to share their antennas.Thus virtual multi-antenna can be created to realize transmitting diversity.LDPC code is a good linear block code.Because of the intrinsic coherence among the bits of the code word

we can create virtual multi-antenna and obtain diversity gain by making different users transmit different parts of the code word.Once diversity gain is obtained

the system performance can be improved effectively

without much rise in the system bandwidth and transmitting power

nor would the cost and complexity of the system increase evidently.