Impact Analysis of LFM Jammer Signals on Stepped Frequency PAM4 RADAR Waveforms

  • K. Keerthana
  • G. A. Shanmugha SundaramEmail author
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 910)


Recognizing targets becomes a difficult process when the jamming signal tries to overwhelm the signals detected at a radar receiver. In radar systems, the most common type of signals used are the continuous and pulsed waveforms. For enhanced target detection and range resolution, continuous changes in the waveforms are required in pulsed waveforms. For continuous waveforms, such changes are not required, and both transmitter and receiver are working as two separate antenna systems as in a monostatic radar, which can provide a high signal-to-noise ratio (SNR). In this work, the linear frequency modulated (LFM) waveform is introduced as a strong jamming signal. The radar signals of the compound pulsed radar modulation type are considered here, with the combination of stepped frequency waveform (SFW) and a four-level pulse amplitude modulation (PAM4). The SFW is capable of high range resolution (HRR), while PAM4 can provide a lower bandwidth. This new approach shows characteristics such as better target detection, good range resolution, and proper range measurements, even with the presence of the LFM jamming signal. Simulation is done using a monostatic radar system to analyze the radar operations and performance. Results are investigated in terms of different radar parameters like range-Doppler response, FFT spectrum, target returns, burn-through range, cross-over range, and signal-to-jammer-noise ratio.


Stepped frequency waveforms PAM4 LFM RADAR jammer Monostatic radar Range-Doppler response Target return Burn-through range Cross-over range 


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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Center for Computational Engineering and NetworkingAmrita School of Engineering, Amrita Vishwa VidyapeethamCoimbatoreIndia
  2. 2.Department of Electronics and Communications EngineeringAmrita School of Engineering, Amrita Vishwa VidyapeethamCoimbatoreIndia
  3. 3.SIERS Research LaboratoryASE Coimbatore, Amrita UniversityCoimbatoreIndia

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