Binary source estimation using two-tier structure of wireless sensor network
二层架构的无线传感器网络的二进制源估计

The traditional source estimates scheme can not being easily scalable to a large number of sensors, this paper proposed a new DJSCC scheme with iterative decoding for a two-tiered WSN. It had the low complexity and the high extendibility. This scheme used two sink nodes per cluster providing a distributed space-time block codingDSTBC. The proposed scheme was easily expandable to a large number of sensors, appropriated for applications with indirect source observation. It was applicable to time-varying observation accuracy models. Through the analysis of BER performance upper bound, establishing a system model and implementing system simulation. Simulation results show that: athe BER performance of the system with the proposed algorithm shows 1 to 4 dB improvement compared to the basic decoding scheme, bthe proposed use of secondary sink node at each cluster employing DSTBC not only increases the reliability of the system in case of failure in one of sink nodes, but also improves the BER performance of the whole system by about 2 to 3 dB.