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Exact(5)
First, the phase synchronization between two subarrays is assumed as perfect.
We can see that phase synchronization between two subarrays is important for the proposed method because RMSE becomes larger as error variance increases.
Simulation results show that the performance of localization accuracy of the proposed method is better than that of conventional method using the same number of antennas if the appropriate virtual arrays are configurated and the phase synchronization error between two subarrays is smaller than 0.14 of a wavelength.
We showed that the proposed method localizes a source more accurately than the conventional method when the reference point of virtual array is a real element and the phase synchronization error between two subarrays is smaller than 0.14 of a wavelength.
Simulation results show that the localization accuracy of the proposed method is better than that of the conventional method using the same number of antennas if the appropriate virtual arrays are configurated and the phase synchronization error between two subarrays is smaller than 0.14 of a wavelength.
Similar(55)
In [9], the environment that the AOA of a single signal impinges on two subarrays is considered.
For extended subarrays, the widths of the grating lobes of the two subarrays are slightly different.
Optimal design of FDA subarrays via Cramer-Rao lower bound (CRLB) minimization [20, 33] confirmed that two subarrays are the optimum choice in selecting the number of subarrays.
When the subarrays are steered to look at direction u L, the weight vectors for the two subarrays are w1L=v1L/M and w2L=v2L/N, respectively, where v1L and v2L are the M and N element direction vectors for the two subarrays.
Because M and N are coprime, the grating lobes from the two subarrays are at different locations.
AOA method uses array antenna to estimate direction of arrival and more than two subarrays are required to localize sources.
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