Power Allocation Algorithm For Wireless WideBand Localization System Using Minimum SPEB Criterion

With the development of wireless communication technology,wireless location technology plays an important role in our daily life.The positioning accuracy is determined by parameter measurement methods,network topology and the power resource allocation.In this paper,we study the power allocation by the minimum squared position error bound(SPEB).The main contributions are as follows:(1)The power allocation algorithm is studied for the single target node.In order to obtain the minimum SPEB of the target,the power allocation problem is transformed into a constraint single-objective constraint optimization problem.Based on the mathematical model of power allocation,genetic algorithm(GA)based and particle swarm optimization(PSO)based power allocation algorithm are proposed.Since the above two optimization methods have less mathematical features,they can avoid the limitations of traditional optimization approaches and have great application prospect.Simulation results show that compared with the existing power allocation methods,the proposed algorithm can obtain similar system positioning accuracy,but the computational complexity is reduced dramatically.(2)The power allocation algorithm using evaluation function method is proposed for multiple target.Taking the SPEB of each target nodes as the objective function,the problem of real power allocation is transformed into a constraint multi-objective optimization problem and then the optimal mathematical model of power allocation is established.Using evaluation function method,the multi-objective optimization problem is transformed into a single-objective optimization problem.The shortest-distance ideal point solution based and ? weight coefficient solution based power allocation algorithms are proposed.These two algorithms can sufficiently consider the impact of multiple target nodes on power allocation and do not require any prior knowledge.Simulation results show that compared with the existing algorithms,our algorithm can get the best system positioning effect under the multi-objective target conditions.(3)The power allocation algorithm is proposed for cooperative network.First,the SPEB of target in cooperative positioning system is studied and then the mathematical model for power allocation is established.According to different practical application scenarios,the power allocation algorithm for fixed anchor and target power and for fixed anchor power and fixed target power are proposed respectively.Simulation results show the effectiveness of the proposed algorithms.