Range-Doppler Resolution in Subarray-MIMO Radar with Modified Barker Code: Performance Comparison with PA and MIMO Radars
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Abstract
The type of transmission signal in the telecommunications sector, especially for radar-communication-system-applications, plays an important role in determining the success of system performance. The desired waveform is a signal that has high autocorrelation with minimum-sidelobes, especially for radar-applications that are used to detect targets and minimize of interference and interceptions. Many waveforms have been used in this application, one of which is the Barker code. This paper evaluates and analyzes the use of the modified code for subarray-multiple-input multiple-output (SMIMO) radar applications, which exhibit adaptive detection performance based on target and environmental conditions, an aspect not explored in previous studies. The ambiguity function (AF) performance of this waveform is used to obtain range-Doppler-resolution with three-dimensional plot as function of time-delay, angle, and Doppler frequency. AF performance was tested involving the mainlobe-sidelobe level, peak-sidelobe-ratio (PSLR), and number of transmit subarrays in the SMIMO radar which were compared with the performance of conventional radars such as phased-array (PA) and MIMO radars. For example, the self-modified Barker code (B11,7) gives mainlobe AF performance on PA, MIMO, and SMIMO (K = 5) radars of 48.86dB, 53.86dB, and 54.75dB, respectively. Meanwhile, range resolution, Doppler resolution, and PSLR are 214.5m, 1402.65m/s, and -8.449dB respectively.
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