Patent ID: 11949488
Assignee: ZTE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 21:
22. The method according to claim 21, wherein estimating the DOA of the receiving signal comprises:
establishing an equation set with sin θ cos ϕ, sin θ sin ϕ and cos θ as unknowns, according to the first signals and the second signals received by the first group of the analog subarrays, the difference between the phase centers before change and the difference between the phase centers after change of the first group of the analog subarrays, the first signals and the second signals received by the second group of the analog subarrays, the difference between the phase centers before change and the difference between the phase centers after change of the second group of the analog subarrays, and the first signals and the second signals received by the third group of the analog subarrays, the difference between the phase centers before change and the difference between the phase centers after change of the third group of the analog subarrays; wherein the θ is a zenith angle of the DOA, the ϕ is an azimuth of the DOA;
obtaining the sin θ cos ϕ, the sin θ sin ϕ and the cos θ by solving the equation set; and
calculating the θ and the ϕ according to the sin θ cos ϕ, the sin θ sin ϕ and the cos θ.