Cooperative Communication in Clustered Wireless Sensor Network Based on LDPC Codes

In this paper, considering a clustered wireless sensor network, we propose a cooperative transmission scheme based on virtual multiple antennas combining with advanced channel coding ( such as low density parity check codes), and give the system performance under different conditions through simulation. The whole transmission can be divided into two stages: at the first stage, cluster head broadcasts the information and other sensors listen, which we call it intracluster broadcasting phase, at the second stage, sensors that can correctly decode the received information participate in the cooperative transmission, which we call it intercluster transmission phase. Then we minimize the overall energy consumption by adjusting the power allocation between these two transmission phase. Compared with the research so far, we apply advanced channel coding at each sensor node, which makes the system performance much better.