CAJ | 학술논문

针对局部传感器发射功率约束部分相干检测融合问题，利用偏移系数极大化理论优化系统检测性能，建立了基于多址接入信道传输的多传感器分布式部分相干检测融合模型，该模型将融合中心处相位同步误差建模为服从吉洪诺夫概率分布的随机变量。将局部发射功率约束部分相干检测融合问题转化为一个非线性非凸优化问题，利用非线性优化理论，得到了问题的一维搜索闭合解。蒙特卡洛仿真结果表明：当环路信噪比大于等于10时，文中方法能在低信噪比和低虚警概率情况下显著提高融合系统对目标的检测概率，其检测性能优于传统的基于并行网络拓扑结构的最优似然比方法。
침대국부전감기발사공솔약속부분상간검측융합문제，이용편이계수겁대화이론우화계통검측성능，건립료기우다지접입신도전수적다전감기분포식부분상간검측융합모형，해모형장융합중심처상위동보오차건모위복종길홍낙부개솔분포적수궤변량。장국부발사공솔약속부분상간검측융합문제전화위일개비선성비철우화문제，이용비선성우화이론，득도료문제적일유수색폐합해。몽특잡락방진결과표명：당배로신조비대우등우10시，문중방법능재저신조비화저허경개솔정황하현저제고융합계통대목표적검측개솔，기검측성능우우전통적기우병행망락탁복결구적최우사연비방법。
The study aims to solve the problem of the local power constrained partially coherent distributed detection . T he deflection coefficient maximization ( DCM ) is used to optimize the performance of the fusion system under the local power constraint of sensors .The model of partially coherent distributed detection fusion system based on the multiple access channel (MAC ) was established and the residual error of phase synchronization was modeled by the Tikhonov probability distribution function . The problem of power constrained partially coherent detection fusion was transformed into a nonlinear non-convex optimization problem .T he nonlinear optimization theory results to obtain the closed-form solution of one dimensional searching .Monte-Carlo simulations results verified the performance of the proposed method .Simulation results show that ,when the loop SNR is greater than or equal to 10 ,the proposed method can significantly improve the detection performance of the fusion system under the low false alarm probability and the low signal-to-noise ratio (SNR) .The detection performance of the proposed method outperforms the existing LRT method which is the optimal under the parallel access channel (PAC) scheme .