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Full-duplex cooperative relaying with NOMA for the performance enhancement of underwater acoustic sensor networks
Engineering Science and Technology, an International Journal ( IF 5.7 ) Pub Date : 2021-04-21 , DOI: 10.1016/j.jestch.2021.03.008
Veerapu Goutham , V.P. Harigovindan

Cooperative relaying scheme is identified as an efficient method for improving the reliability and energy efficiency of underwater acoustic sensor networks (UASNs) by exploiting the spatial diversity. Unlike the existing research works, we propose a full-duplex cooperative relaying with NOMA (FD-CR-NOMA) for UASNs. We derive accurate mathematical equations for the calculation of ergodic rate, outage probability, and energy efficiency in UASNs by considering the underwater specific characteristics, namely distance-dependent usable bandwidth, acoustic spreading, propagation losses, and fading effects. Analytical and simulation results show that the FD-CR-NOMA can significantly improve the performance of energy-constrained and bandwidth-limited UASNs in terms of ergodic rate, outage probability, and energy efficiency compared to the other existing cooperative relaying schemes. We analyse the impacts of residual self-interference and imperfect successive interference cancellation on the performance of FD-CR-NOMA. Later, we examine the impact of change in relay position on the FD-CR-NOMA and also the effects of wind speed and shipping activities on the proposed FD-CR-NOMA. It is also observed from results that the high-speed winds and high shipping activities considerably degrade the ergodic sum rate and energy efficiency of the FD-CR-NOMA. In addition, we jointly optimise the signal frequency and power allocation coefficient for the FD-CR-NOMA with respect to the transmission distance using particle swarm optimisation, to further enhance the ergodic rate.



中文翻译:

与 NOMA 的全双工协作中继用于水声传感器网络的性能增强

合作中继方案被认为是一种利用空间多样性提高水声传感器网络(UASN)可靠性和能源效率的有效方法。与现有的研究工作不同,我们为 UASN 提出了一种与 NOMA(FD-CR-NOMA)的全双工协作中继。我们通过考虑水下特定特性,即与距离相关的可用带宽、声学传播、传播损耗和衰落效应,推导出用于计算 UASN 中遍历速率、中断概率和能量效率的准确数学方程。分析和仿真结果表明,FD-CR-NOMA 在遍历速率、中断概率、和其他现有合作中继方案相比的能源效率。我们分析了残余自干扰和不完善的连续干扰消除对 FD-CR-NOMA 性能的影响。稍后,我们检查中继位置变化对 FD-CR-NOMA 的影响,以及风速和航运活动对提议的 FD-CR-NOMA 的影响。从结果还观察到,高速风和高航运活动大大降低了 FD-CR-NOMA 的遍历总和率和能源效率。此外,我们使用粒子群优化针对传输距离联合优化 FD-CR-NOMA 的信号频率和功率分配系数,以进一步提高遍历率。我们分析了残余自干扰和不完善的连续干扰消除对 FD-CR-NOMA 性能的影响。稍后,我们研究了中继位置变化对 FD-CR-NOMA 的影响,以及风速和航运活动对提议的 FD-CR-NOMA 的影响。从结果还观察到,高速风和高航运活动大大降低了 FD-CR-NOMA 的遍历总和率和能源效率。此外,我们使用粒子群优化技术针对传输距离联合优化 FD-CR-NOMA 的信号频率和功率分配系数,以进一步提高遍历率。我们分析了残余自干扰和不完善的连续干扰消除对 FD-CR-NOMA 性能的影响。稍后,我们检查中继位置变化对 FD-CR-NOMA 的影响,以及风速和航运活动对提议的 FD-CR-NOMA 的影响。从结果还观察到,高速风和高航运活动大大降低了 FD-CR-NOMA 的遍历总和率和能源效率。此外,我们使用粒子群优化技术针对传输距离联合优化 FD-CR-NOMA 的信号频率和功率分配系数,以进一步提高遍历率。我们检查了中继位置变化对 FD-CR-NOMA 的影响,以及风速和航运活动对提议的 FD-CR-NOMA 的影响。从结果还观察到,高速风和高航运活动大大降低了 FD-CR-NOMA 的遍历总和率和能源效率。此外,我们使用粒子群优化技术针对传输距离联合优化 FD-CR-NOMA 的信号频率和功率分配系数,以进一步提高遍历率。我们检查了中继位置变化对 FD-CR-NOMA 的影响,以及风速和航运活动对提议的 FD-CR-NOMA 的影响。从结果还观察到,高速风和高航运活动大大降低了 FD-CR-NOMA 的遍历总和率和能源效率。此外,我们使用粒子群优化针对传输距离联合优化 FD-CR-NOMA 的信号频率和功率分配系数,以进一步提高遍历率。

更新日期:2021-04-21
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