As compared with 2D wireless camera sensor networks (WCSNs), 3D WCSNs can capture more accurate and comprehensive information for exposure-path prevention in supervisory and military applications. However, 3D WCSNs impose many new challenges for energy-efficiency and interference-mitigation subject to required coverage rate constraint due to extensive power consumption over time-varying wireless channels. To overcome the above-mentioned problems, in this paper we propose the AQ-DBPSK/DS-CDMA (alternating quadratures differential binary phase shift keying/direct-sequence code division multiple access) based cooperative MIMO energy-efficient and interference-mitigating scheme under the constraint of optimal tradeoff between power consumption and coverage rate over multi-hop clustered WCSNs. In particular, we build sensing models to characterize the minimum coverage rate constraint and formulate the exposure-path prevention problem using the percolation theory. Then, we derive the critical density of camera sensors subject to minimum exposure-path prevention probability constraint. We develop the AQ-DBPSK/DS-CDMA scheme and also derive the optimal data rate to optimize transmit-power and data-rate trade-off. By deriving the critical density of camera sensors over 3D WCSNs, we apply the cooperative MIMO based NEW LEACH architecture for our multi-hop cooperative MIMO scheme. Also conducted is a set of simulations which show that our proposed scheme can outperform other existing schemes in terms of energy efficiency and interference-mitigation over multi-hop 3D clustered WCSNs.

中文翻译：

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基于协作 MIMO-OFDM 的曝光路径预防在 3D 集群无线摄像头传感器网络上

与 2D 无线摄像头传感器网络 (WCSN) 相比，3D WCSN 可以捕获更准确、更全面的信息，用于监控和军事应用中的曝光路径预防。然而，由于时变无线信道上的大量功耗，3D WCSN 对能源效率和干扰减轻提出了许多新的挑战，这些挑战受到所需的覆盖率约束。针对上述问题，本文提出了基于 AQ-DBPSK/DS-CDMA（交替正交差分二进制相移键控/直接序列码分多址）的协作 MIMO 节能抗干扰方案。多跳集群 WCSN 上功耗和覆盖率之间最优权衡的约束。特别是，我们建立传感模型来表征最小覆盖率约束，并使用渗透理论制定暴露路径预防问题。然后，我们推导出受最小曝光路径预防概率约束的相机传感器的临界密度。我们开发了 AQ-DBPSK/DS-CDMA 方案，并推导出最佳数据速率以优化传输功率和数据速率的权衡。通过推导出 3D WCSN 上相机传感器的临界密度，我们将基于协作 MIMO 的 NEW LEACH 架构应用于我们的多跳协作 MIMO 方案。还进行了一组模拟，表明我们提出的方案在多跳 3D 集群 WCSN 的能量效率和干扰减轻方面可以优于其他现有方案。