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Efficient Range Estimation in Beat Radio Interferometry
DOI:10.1109/ACCESS.2017.2679724.png)
摘要
En 中文
The beat radio interferometry (BRI) is a novel ranging scheme that achieves high accuracy with low-cost devices. A major problem with BRI is the lack of an efficient range estimation method that is valid in general measurement configurations and accommodates large-scale scenarios. In this paper, we present a new model of BRI and reveal that range estimation in it is equivalent to single tone frequency estimation. Such a revelation has two natural outcomes: the first is the Cramer-Rao lower bound (CRLB) of BRI range estimation; the second is an efficient fast Fourier transform (FFT)-based method that works in arbitrary measurement configurations and large-scale scenarios. Simulation results show that the FFT-based method asymptotically attains the CRLB and is orders of magnitude faster than currently available methods.
Keyword:
Beat radio interferometry
radio interferometric positioning system
range estimation
frequency estimation
FFT-based method
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期刊
IF:
3.6
论文数:
9.8W
被引数:
29.4W
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