Analysis of the accuracy of the estimation of signal arrival angle in monostatic MIMO radar using the Capon algorithm and its modifications

Capon-like method for direction of arrival estimation using TDM MIMO radar

“…While frequency division and code division techniques require a set of orthogonal signals that can be transmitted simultaneously, time division multiplexing (TDM) provides serial transmission [6][7][8][9][10]. The work presented here extends the authors' previous publications and shows a specific application of DoA measurement using orthogonality with a time-division multiplexing MIMO radar [11]. TDM is often used because of its simplicity and low cost in practical implementations.…”

“…For precise measurement of the angle of arrival of the signal in the presented TDM MIMO radar, the Capon algorithm was used, taking into account the properties of TDM and the MIMO technique and considering modifications as in [11].…”

“…At each receive antenna the echo signal is sampled by the rate of 1/𝑇 slot . The received array signals are matched by each of the transmitting waveforms and the output of the matched filters after collecting a total of 𝑄 pulses can be written as [11]…”

“…The MUSIC (Multiple Signal Classification) and ESPRIT (Estimation of Signal Parameters via Rational Invariance Techniques) algorithms should be classified into the second [20][21][22][23][24]. A comparison of the indicated DoA algorithms is presented by the authors of this publication in [11].…”

“…The main purpose of this paper was to present a method of signal arrival angle measurement based on the adapted Capon method from the paper [11] and its application in a TDM MIMO system. The essential novelty is that a model of a TDM-MIMO radar operating at 10 GHz, transmitting a string of pulses, with a built-in Capon algorithm as described in [11], had to be developed. So far, one can find in the literature applications of TDM-MIMO radars at 77 GHz and simultaneously operating on a continuous wave, just as cited in [15] and [28].…”