Direction of Arrival Estimation Through Joint Phase-Time Arrays

In recent years, private 5G, which allows municipalities and companies to build their own 5G networks in specific areas, such as within their premises, has been attracting attention. Multiple base stations (BSs) are expected to be operated in the vicinity as private 5 G spreads more in the future. In such a scenario, it is essential to suppress and avoid mutual interference between neighboring operators. For interference suppression, the accurate estimation of the direction-of-arrival (DoA) of the interfering signal is necessary. This paper proposes a DoA estimation method using the joint phase-time array (JPTA), a type of analog beamforming (ABF). Computer simulation results show that the proposed DoA estimation method can estimate the DoA with the accuracy of 2° at a 90 -percentile value.