Abstract
Inspired by recent advances in frequency diverse array (FDA) and multiple-input-multiple-output (MIMO) radars, this paper investigates the target detection performance of FDA-MIMO radar, which jointly utilizes the advantages of FDA radar and MIMO radar, for single- and multiple- coherent pulses, respectively. Firstly, the signal models in target detection are formulated for FDA-MIMO, standard FDA, phased-array and MIMO radars, respectively. We present a unified framework detector to comparatively analyze their target detection performance in the Neyman-Pearson sense. Furthermore, the deflection coefficient and signal-to-interference-plus-noise ratio (SINR) are also adopted as a performance metric to compare their performance. Numerical results show that FDA-MIMO radar achieves better target detection performance as compared to other conventional radar systems, specially when multiple coherent pulses are utilized.
Highlights
Multiple-input–multiple-output (MIMO) radar has gained a great deal of attention from researchers and has been widely applied to several radar scenarios and problems [1]–[3]
At low signal-to-noise ratio (SNR), It is evident from the figure that, frequency diverse array (FDA)-multiple-input multiple-output (MIMO) radar system have better detection performance than the FDA radar, phased-array radar and MIMO radar
This figure establishes the advantages of hybridizing FDA and MIMO radar systems
Summary
Multiple-input–multiple-output (MIMO) radar has gained a great deal of attention from researchers and has been widely applied to several radar scenarios and problems [1]–[3]. According to the characteristics of FDA-MIMO radar configuration, a general signal model for target detection based on single and multiple coherent pulses is presented. The rest of this paper is organized as follows: Section II introduces the motivation of this work and formulates the signal models of conventional phased-array radar and MIMO radar. VOLUME 7, 2019 performance of FDA-MIMO radar with the conventional radars including phased-array radar and MIMO radar under single-pulse detection scenario and multiple-pulse detection scenario, respectively. The base-band received signal model of the conventional phased-array radar systems can be expressed as [5]. Exp −j (M − 1) fm T is the FDA-MIMO transmit steering vector with respect to the receiver with fm = 2π d sin θ λ − 2r f c.
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