Time-Modulated Array System Controlled With Bipolar Squared Periodic Sequence for Direction of Arrival Estimation
Young-Woo Youn, Jeongphill Kim, Sangyeol Oh, Sang‐Hwa Yi
Abstract
A new approach to estimate the direction-of-arrival (DOA) in a Time-Modulated Array (TMA) system with a bipolar squared periodic time-modulating sequence is proposed in this letter. Using such a sequence can increase the power of harmonic components of the received signal. Based on this fact, we formulated a new parameter pertaining to the ratio of the upper and lower sideband first harmonic components of the received signal, to improve the accuracy of the DOA estimation in a low signal-to-noise ratio (SNR) environment. A numerical analysis was performed to verify the effectiveness of the proposed DOA estimation method.
Topics & Concepts
Direction of arrivalSequence (biology)SidebandAlgorithmSIGNAL (programming language)HarmonicSignal-to-noise ratio (imaging)Computer scienceNoise (video)MathematicsAcousticsSpeech recognitionTelecommunicationsPhysicsRadio frequencyArtificial intelligenceGeneticsProgramming languageImage (mathematics)Antenna (radio)BiologyAntenna Design and OptimizationDirection-of-Arrival Estimation TechniquesRadio Astronomy Observations and Technology