Performance Metric on the Best Achievable Accuracy for Hybrid TOA/AOA Target Localization
Performance Metric on the Best Achievable Accuracy for Hybrid TOA/AOA Target Localization
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DOI：
10.1109/lcomm.2018.2833544
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发表时间：
2018-07-01
期刊：
影响因子：
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通讯作者：
Sheng, An-Dong
中科院分区：
文献类型：
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作者：
Li, Yin-Ya;Qi, Guo-Qing;Sheng, An-Dong
这封信提出了用于混合到达时间/到达角度（TOA/AOA）目标定位的 Cramer-Rao 下界（CRLB）的通用封闭式公式。给出了混合TOA/AOA、TOA和AOA方案CRLB存在的充要条件。对于给定的定位场景，混合 TOA/AOA 方案的最佳可实现精度已被理论上证明优于任何一种 TOA 和 AOA 方案。通过这种混合方案，与TOA方案相比，可以放宽定位系统严格的时间同步要求，并且可以减少接收器的数量。
This letter proposes a general closed-form formula of the Cramer-Rao lower bound (CRLB) for hybrid time-of-arrival/angle-of-arrival (TOA/AOA) target localization. The necessary and sufficient conditions on the existences of the CRLBs for hybrid TOA/AOA, TOA, and AOA schemes are all presented. For a given localization scenario, the best achievable accuracy of the hybrid TOA/AOA scheme has been theoretically proved to be better than that of any one of the TOA and AOA schemes. With this hybrid scheme, the stringent time synchronization requirement of the localization system can be relaxed and the number of receivers can be reduced compared to the TOA scheme.