Range and Velocity Resolution of Linear- Frequency-Modulated Signals on Subarray-Mimo Radar


  • Sabaria Sabaria Universitas Borneo Tarakan, Indonesia
  • Syahfrizal Tahcfulloh Universitas Borneo Tarakan, Indonesia




ambiguity-function, linear-frequency-modulated (LFM), MIMO radar, peak sidelobe level ratio, range and velocity resolution.


The most important radar system performance is determining the range-velocity of the detected target. This performance is obtained from processing an ambiguity-function (AF) between signals from target reflections and radar radiation signals. Selection of the appropriate waveform transmitted by the radar is a key factor in supporting high resolution radar performance in the AF. There are many waveforms that have been studied in radar systems, especially for multi-antenna radars, i.e., subarray-MIMO (SMIMO) radar which can form phased array (PA) and MIMO radars simultaneously, in the form of linear-frequency-modulated (LFM) signals. In this paper, we examine the use of LFM waveforms combined with SMIMO radar to produce plots of three-dimensional AF as a function of time delay and Doppler shift. The results of the comparison with the Hadamard signal determine the effectiveness of the observed AF performance on parameters such as magnitude, range-velocity resolution, peak sidelobe level ratio, and integrated sidelobe ratio by taking into account the factors of the number of Tx antennas on the PA radar and the number of Tx subarrays on the MIMO radar. The evaluation results of the SMIMO radar configuration (M = 6) with the number of Tx-Rx antenna elements the being 8 provide the best mainlobe magnitude, sidelobe magnitude, range resolution, velocity resolution, PSLR, and ISLR of AF LFM signals compared to conventional radars are 235.2dB, 7.54dB, 37.5m, 75km/s, 29.89dB, and 29.8dB, respectively. Meanwhile, the LFM signal is far superior to the Hadamard signal which has PSLR and ISLR 1.16dB and -3.36dB, respectively.


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W. Delaney, “From vision to reality 50+ years of phased array development,†in 2016 IEEE International Symposium on Phased Array Systems and Technology (PAST), IEEE, 2016, pp. 1–8.

E. Brookner, “MIMO radar demystified and where it makes sense to use,†in 2014 International Radar Conference, IEEE, 2014, pp. 1–6.

S. Tahcfulloh, “SMIMO radar: MIMO radar with subarray elements of phased-array antenna,†IJITEE (International J. Inf. Technol. Electr. Eng., vol. 5, no. 2, pp. 37–44, 2021.

S. Tahcfulloh and G. Hendrantoro, “FPMIMO: a general MIMO structure with overlapping subarrays for various radar applications,†IEEE Access, vol. 8, pp. 11248–11267, 2020.

M. Jiazhi, S. Longfei, and L. Jian, “Improved two-targets resolution using dual-polarization radar with interlaced subarray partition,†in 2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI), IEEE, 2017, pp. 397–400.

K. Han and S. Hong, “High-resolution phased-subarray MIMO radar with grating lobe cancellation technique,†IEEE Trans. Microw. Theory Tech., vol. 70, no. 5, pp. 2775–2785, 2022.

S. Elayaperumal and K. V. S. Hari, “Optimal irregular subarray design for adaptive jammer suppression in phased array radar,†in 2019 IEEE International Symposium on Phased Array System & Technology (PAST), IEEE, 2019, pp. 1–7.

K. Patel, U. Neelakantan, S. Gangele, J. G. Vacchani, and N. M. Desai, “Linear frequency modulation waveform synthesis,†in 2012 IEEE Students’ Conference on Electrical, Electronics and Computer Science, IEEE, 2012, pp. 1–4.

Z. Xu, Y. Wang, J. Luo, M. Che, H. Wang, and D. Zhang, “Potential of Reducing FMCW Radar Mutual-interference Using Nonlinear FM Signals,†in 2021 CIE International Conference on Radar (Radar), IEEE, 2021, pp. 2852–2855.

Z. Xu, X. Wang, and Y. Wang, “Nonlinear Frequency-Modulated Waveforms Modeling and Optimization for Radar Applications,†Mathematics, vol. 10, no. 21, p. 3939, 2022.

X. Zhao, W. Zhang, Z. He, and J. Li, “Performance analysis of airborne LFMCW-MIMO vitual array radar,†in 2016 CIE International Conference on Radar (RADAR), IEEE, 2016, pp. 1–5.

D. Luong, A. Young, B. Balaji, and S. Rajan, “Classifying Linear Frequency Modulated Radar Signals Using Matched Filters,†in 2022 IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), IEEE, 2022, pp. 11–15.

L. Lan, G. Liao, J. Xu, Y. Zhang, and Y. Xu, “Low sidelobes optimization with subarrays for space-time circulating LFMs,†in 2017 IEEE Radar Conference (RadarConf), IEEE, 2017, pp. 73–77.

A. Santra, A. R. Ganis, J. Mietzner, and V. Ziegler, “Ambiguity function and imaging performance of coded FMCW waveforms with fast 4D receiver processing in MIMO radar,†Digit. Signal Process., vol. 97, p. 102618, 2020.

E. M. Almohimmah et al., “Performance investigation of an ambiguity function-shaped waveform (AFSW) using a photonics-based radar system,†Opt. Express, vol. 31, no. 3, pp. 3784–3803, 2023.

L. Liu, Y. Ji, and L. Zhang, “Timeâ€domain and frequencyâ€domain exponential ambiguity functions and their application in joint estimation of delay and Doppler shift,†IET Radar, Sonar Navig., vol. 16, no. 3, pp. 437–455, 2022.

C. V Ilioudis, C. Clemente, I. Proudler, and J. Soraghan, “Ambiguity function for distributed MIMO radar systems,†in 2016 IEEE Radar Conference (RadarConf), IEEE, 2016, pp. 1–6.

N. Johnson, M. Chergui, O. Sternberg, J. D. Rockway, and W. L. Jones, “Ambiguity function analysis for passive radar system performance,†in MILCOM 2016-2016 IEEE Military Communications Conference, IEEE, 2016, pp. 872–876.

J. Zhang, X. Qiu, C. Shi, and Y. Wu, “Cognitive radar ambiguity function optimization for unimodular sequence,†EURASIP J. Adv. Signal Process., vol. 2016, pp. 1–13, 2016.

B. R. Mahafza, Radar systems analysis and design using MATLAB. Chapman and Hall/CRC, 2005.

C.-Y. Chen and P. P. Vaidyanathan, “Properties of the MIMO radar ambiguity function,†in 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, IEEE, 2008, pp. 2309–2312.

W. Khan, I. M. Qureshi, and K. Sultan, “Ambiguity function of phased–MIMO radar with colocated antennas and its properties,†IEEE Geosci. Remote Sens. Lett., vol. 11, no. 7, pp. 1220–1224, 2013.

S. Tahcfulloh and G. Hendrantoro, “Phased-MIMO radar using Hadamard coded signal,†in 2016 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET), IEEE, 2016, pp. 13–16.

L. Nurpulaela and R. S. Hadikusuma, “IoT Frequency Band Channelization in Indonesia as A Recommendation for Machine-To-Machine Communication Preparation in the 5G Era,†J. ELTIKOM J. Tek. Elektro, Teknol. Inf. dan Komput., vol. 7, no. 1, pp. 50–59, 2023.




How to Cite

Sabaria, S. and Tahcfulloh, S. 2024. Range and Velocity Resolution of Linear- Frequency-Modulated Signals on Subarray-Mimo Radar. Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer. 7, 2 (Feb. 2024), 200–209. DOI:https://doi.org/10.31961/eltikom.v7i2.940.