论文标题

使用多元多项式优化在窄带互联网中使用一位无源雷达进行本地化

Localization with One-Bit Passive Radars in Narrowband Internet-of-Things using Multivariate Polynomial Optimization

论文作者

Sedighi, Saeid, Mishra, Kumar Vijay, Shankar, M. R. Bhavani, Ottersten, Björn

论文摘要

几种互联网应用程序(IoT)应用程序提供了基于位置的服务,其中至关重要的是,通过从单个传感器中汇总信息来获得准确的位置估计。在最近提出的窄带物联网(NB-iot)标准中,将带宽进行交易以获得广泛的覆盖范围,位置估计值较低的采样率接收器和有限的容量链接会使位置估计更加复杂。我们在接收利益目标信号的被动传感设备的框架内解决了这两个NB-IOT缺点。我们考虑了一个限制案例,其中每个节点接收器采用一位类似物到数字传感器,并使用约束加权最小二乘最小化的新型低复杂性淋巴结延迟估计方法。为了支持融合中心(FC)的低容量链接,然后将在单个传感器处获得的范围估计值转换为一位数据。在FC上,我们使用最佳和亚最佳技术提出了汇总的一位范围矢量的目标定位。计算昂贵的以前方法基于Lasserre的多元多项式优化的方法,而后者采用了我们较不复杂的迭代关节r \ textit {an} ge-- \ textit {tar}获取位置\ textit \ textit {es} {es} timation {antares(antares)algorithm。我们的整体一位框架不仅可以补充低NB-iot带宽,而且还支持廉价的NB-iot位置感测的设计目标。数值实验证明了提议的一位方法的可行性,而在完整案例中,对于$ 20 $ -60 $ -60 $的节点的标准化本地化误差增加了0.6 $ \%。当节点的数量足够大($> 80美元)时,一位方法的性能与完整的精度相同。

Several Internet-of-Things (IoT) applications provide location-based services, wherein it is critical to obtain accurate position estimates by aggregating information from individual sensors. In the recently proposed narrowband IoT (NB-IoT) standard, which trades off bandwidth to gain wide coverage, the location estimation is compounded by the low sampling rate receivers and limited-capacity links. We address both of these NB-IoT drawbacks in the framework of passive sensing devices that receive signals from the target-of-interest. We consider the limiting case where each node receiver employs one-bit analog-to-digital-converters and propose a novel low-complexity nodal delay estimation method using constrained-weighted least squares minimization. To support the low-capacity links to the fusion center (FC), the range estimates obtained at individual sensors are then converted to one-bit data. At the FC, we propose target localization with the aggregated one-bit range vector using both optimal and sub-optimal techniques. The computationally expensive former approach is based on Lasserre's method for multivariate polynomial optimization while the latter employs our less complex iterative joint r\textit{an}ge-\textit{tar}get location \textit{es}timation (ANTARES) algorithm. Our overall one-bit framework not only complements the low NB-IoT bandwidth but also supports the design goal of inexpensive NB-IoT location sensing. Numerical experiments demonstrate feasibility of the proposed one-bit approach with a $0.6$\% increase in the normalized localization error for the small set of $20$-$60$ nodes over the full-precision case. When the number of nodes is sufficiently large ($>80$), the one-bit methods yield the same performance as the full precision.

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