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A Bias Compensation Method for Distributed Moving Source Localization Using TDOA and FDOA with Sensor Location Errors

机译:使用带有传感器位置误差的TDOA和FDOA的分布式运动源定位偏差补偿方法

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摘要

Current bias compensation methods for distributed localization consider the time difference of arrival (TDOA) and frequency difference of arrival (FDOA) measurements noise, but ignore the negative influence by the sensor location uncertainties on source localization accuracy. Therefore, a new bias compensation method for distributed localization is proposed to improve the localization accuracy in this paper. This paper derives the theoretical bias of maximum likelihood estimation when the sensor location errors and positioning measurements noise both exist. Using the rough estimate result by MLE to subtract the theoretical bias can obtain a more accurate source location estimation. Theoretical analysis and simulation results indicate that the theoretical bias derived in this paper matches well with the actual bias in moderate noise level so that it can prove the correctness of the theoretical derivation. Furthermore, after bias compensation, the estimate accuracy of the proposed method achieves a certain improvement compared with existing methods.
机译:当前用于分布式定位的偏置补偿方法考虑了到达时间差(TDOA)和到达频率差(FDOA)测量噪声,但忽略了传感器位置不确定性对源定位精度的负面影响。因此,为提高定位精度,提出了一种新的分布式定位偏差补偿方法。当传感器位置误差和定位测量噪声同时存在时,本文推导了最大似然估计的理论偏差。使用MLE的粗略估计结果减去理论偏差可以得到更准确的源位置估计。理论分析和仿真结果表明,本文推导的理论偏差与中等噪声水平的实际偏差吻合良好,可以证明理论推导的正确性。此外,经过偏置补偿后,与现有方法相比,该方法的估计精度有了一定的提高。

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