相位谱拟合车载自组网中功率增益优化方法

Vehicle ad hoc Network Power Gain Optimization Based on Phase Spectrum Fitting

车载自组网WSN无线传感网络的接收/发射功率的无偏均衡设计,可以提高网络节点寿命,保证系统的稳定性,提高车载自组网的通信能力和网络连接率。传统方法采用的固定步长加权的滤波设计算法进行功率均衡设计,导致车载自组网的相邻节点功率均衡偏差,提出一种基于无偏均衡和相位谱拟合的车载自组网中功率增益优化算法,进行无偏均衡的车载自组网中网络连接率优化设计,确定节点一跳范围内的邻居节点,实现功率谱的估计,在功率均衡设计中,进行可变步长滤波设计,反映了信道幅值、时间和频率之间关系,对相位谱做最小二乘拟合求斜率,实现WSN可变步长滤波接收/发射功率无偏均衡算法改进。研究结果表明,该算法实现了接收/发射功率的无偏均衡,网传输距离提高,具有较大的功率增益,网络连接率较传统方法提高,展示了优越的应用性能。

Unbiased balanced design of receiving / vehicular ad hoc networks WSN wireless sensor network transmission power is researched, it can improve the network lifetime, guarantee the stability of the system, improve the communication capacity of vehicular ad hoc networks. Filter design algorithm of fixed step size weighted by traditional method of design of power balance is proposed, leading to adjacent nodes power equilibrium deviation of vehicular ad hoc networks, an vehicle Ad hoc network power gain optimization method is proposed based on unbiased equalization and phase spectrum fitting, it determines the neighbor node jump range, using power spectrum estimation. In the design of power equalization, variable step size filter design, reflects the relationship between channel amplitude, time and frequency, the phase spectrum of least squares fitting slope is taken, implementation of WSN variable step size filter receiving / transmitting power unbiased equalization algorithms are obtained. The results show that the algorithm of receiving / transmitting power van get the unbiased balanced, network transmission distance is improved. Transmission gain is larger than the traditional method, the network connection rate is increased, it shows a superior performance.