Cooperative MIMO-OFDM based multi-hop 3D clustered wireless camera sensor networks

As compared with 2D wireless camera sensor networks (WCSNs), 3D WCSNs can capture more accurate and comprehensive information for supervisory and military applications. However, 3D WCSNs impose many new challenges for energy-efficiency and interference-mitigation subject to the required coverage rate constraint due to their extensive power consumption for data transmissions and inter-sensor interference over time-varying wireless channels in the 3D WCSNs. To overcome the above-mentioned problems, in this paper we propose the multi-hop cooperative multi-input-multi-output and orthogonal frequency-division multiplexing (MIMO-OFDM) based energy-efficient and interference-mitigating scheme for the 3D clustered WCSNs with the minimum target-object coverage rate constraint. We propose to integrate the cooperative MIMO-OFDM with the new low energy adaptive clustering hierarchy (NEW LEACH) algorithm to increase the spatial diversity of wireless channels, reducing the transmitted power with the constraints of bandwidth and energy in multi-hop WCSNs. In particular, applying the NEW LEACH architecture and using the Nakagami-m model, we develop the cooperative MIMO-OFDM based scheme to implement the energy-efficient and interference-mitigating wireless communications over our multi-hop 3D clustered WCSNs. Then, we model and analyze the performance of our proposed cooperative MIMO-OFDM scheme. Also conducted is a set of simulations which show that our proposed scheme outperform the other existing schemes in terms of energy efficiency and interference mitigation over multi-hop 3D WCSNs.