SCIENCE@home

Unambiguous 2-D Angle-of-Arrival Estimation Receiver Based on a 16-Port Interferometer

X. Yang,Cheng Qi,J. Xie,Xuchun Zhang,Zhenheng Liao,Xiaowei Sun

Published 2023 in IEEE Transactions on Instrumentation and Measurement

ABSTRACT

Multiport interferometer (MPI) techniques are getting more and more attention, especially for passive receiver (Rx) beyond 24 GHz. However, MPIs with more than six ports are rarely been studied. And the existing MPI techniques only can achieve 2-D angle-of-arrival (AOA) estimation in a narrow range of angle, which means they have an ambiguous problem. In this article, an unambiguous 2-D AOA estimation Rx based on a 16-port interferometer is proposed and demonstrated. It has three main components: eight antennas, a 16-port interferometer, and a signal processor. The 16-port interferometer with eight input ports and eight output ports is the key part and the main point of this article. The eight input signals are superposed on eight output port signals in the interferometer. First, a 16-port interferometer and the corresponding AOA estimation algorithm are proposed. The algorithm transposes the phase differences between the antenna elements into the power relationship of the output signals. Then, the Rx error models are established to obtain the systematic errors. After that, a method for reducing angle ambiguity is introduced. The method allows for the distance between the antenna elements to be larger than $\lambda $ /2, and the angle detection range is theoretically–90° to 90°. An Rx operating at 31 GHz was fabricated. The measurements demonstrate that the system operates as expected, with AOAs ranging from–40° to 40° and a mean squared error (MSE) of approximately 1°.

PUBLICATION RECORD

  • Publication year

    2023

  • Venue

    IEEE Transactions on Instrumentation and Measurement

  • Publication date

    Unknown publication date

  • Fields of study

    Physics, Computer Science, Engineering

  • Identifiers
    DOI 10.1109/TIM.2023.3277962
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

CITATION MAP

EXTRACTION MAP

CLAIMS

  • No claims are published for this paper.

CONCEPTS

  • No concepts are published for this paper.

REFERENCES

Showing 1-53 of 53 references · Page 1 of 1

CITED BY