Range-Angle Dependent Transmit Beampattern Synthesis for Linear Frequency Diverse Arrays

• Published in: IEEE transactions on antennas and propagation Vol. 61; no. 8; pp. 4073 - 4081
• Main Author: WANG, Wen-Qin
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-08-2013; Institute of Electrical and Electronics Engineers
• Subjects: Antennas; Applied sciences; Array signal processing; Beampattern synthesis; Exact sciences and technology; frequency diverse array (FDA); Frequency diversity; Interference; Phased arrays; Radar; Radiocommunications; Radiolocalization and radionavigation; range-angle dependent; range-dependent beamforming; Signal to noise ratio; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); transmit beamforming; Vectors; Performance evaluation; frequency diverse array (FDA); range-angle dependent; Two dimensional model; Output signal; range-dependent beamforming; Phased array antenna; Clutter; Beam forming; Beam steering; Carrier frequency; transmit beamforming; Telecommunication system; Radar; Signal processing; Numerical simulation; Linear antenna arrays; Signal to interference plus noise ratio; Beampattern synthesis
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2013.2260515

Phased-array is widely used in communication and radar systems, but the beam steering is fixed in an angle for all the ranges. In this paper, we propose a range-angle dependent beampattern synthesis scheme for linear frequency diverse array (FDA) using the discrete spheroidal sequence, with an aim to focus the transmit energy in a desired two-dimensional spatial section. Different from conventional phased-arrays, FDA employs a small frequency increment, compared to the carrier frequency across the array elements. The range-angle dependent beampattern synthesis method allows the FDA to transmit energy over a desired range or angle sector. This provides a potential to suppress range-dependent clutter and interference, which is not accessible for conventional phased-arrays. The system performance of the proposed FDA is evaluated by the output signal-to-interference-plus-noise ratio (SINR). The effectiveness is verified by comprehensive numerical simulation results.