Performance Analysis of Multi-Hop Amplify-and-Forward Relaying Systems in Rayleigh Fading Channels with a Poisson Interference Field
Performance Analysis of Multi-Hop Amplify-and-Forward Relaying Systems in Rayleigh Fading Channels with a Poisson Interference Field
复制标题
DOI：
10.1109/twc.2013.111513.120658
复制
发表时间：
2014
影响因子：
10.4
通讯作者：
V. Aalo;G. Efthymoglou;T. Soithong;Mohammed M. Alwakeel;S. Al-Wakeel
中科院分区：
文献类型：
--
作者：
V. Aalo;G. Efthymoglou;T. Soithong;Mohammed M. Alwakeel;S. Al-Wakeel
在本文中，我们分析了多跳传输系统的性能，采用放大转发中继在瑞利衰落环境中的泊松场的干扰。干扰模型考虑了中继站和目的节点附近同信道干扰源的空间分布的影响。利用端到端信号干扰比的严格上界，推导出系统中断概率的封闭式表达式。此外，一般调制的平均误符号率，准确的平均误比特率（BER）的二进制调制和平均信道容量的下界的形式，可以可靠地进行数值计算的单重积分，而封闭形式的结果得到了一个特殊的情况下的双跳中继系统。最后，渐近表达式的系统中断概率和端到端的BER推导出有关的因素影响所考虑的系统的性能提供了有用的见解。新的表达式可以用来显示干扰模型参数，如发射功率，路径损耗指数，和空间密度的干扰多跳无线系统的性能的影响。仿真结果进一步证明了解析表达式的准确性。
In this paper, we analyze the performance of multi-hop transmission systems that employ amplify-and-forward relays over a Rayleigh fading environment in the presence of a Poisson field of interferers. The interference model considers the effect of spatial distribution of co-channel interferers in the vicinity of the relays and the destination node. Using a tight upper bound on the end-to-end signal-to-interference ratio, a closed-form expression for the system outage probability is derived. Moreover, a lower bound for the average symbol error rate of general modulations, the exact average bit error rate (BER) of binary modulations and the average channel capacity are presented in the form of single-fold integrals that can be reliably evaluated numerically, whereas closed-form results are obtained for a special case of the dual-hop relaying system. Finally, asymptotic expressions for the system outage probability and the end-to-end BER are derived which provide useful insights regarding the factors affecting the performance of the considered system. The novel expressions can be used to show the impact of interference model parameters such as the transmit power, path loss exponent, and spatial density of interferers on the performance of multi-hop wireless systems. Simulation results are further provided to demonstrate the accuracy of the analytical expressions.