A Waveform Design for Integrated Radar and Jamming Based on Intra-Pulse and Inter-Pulse Multiple-Phase Modulation

ZHANG Shiyuan; LU Xingyu; YAN Huabin; YANG Jianchao; TAN Ke; GU Hong

doi:10.11999/JEIT250600

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ZHANG Shiyuan, LU Xingyu, YAN Huabin, YANG Jianchao, TAN Ke, GU Hong. A Waveform Design for Integrated Radar and Jamming Based on Intra-Pulse and Inter-Pulse Multiple-Phase Modulation[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT250600

Citation:

ZHANG Shiyuan, LU Xingyu, YAN Huabin, YANG Jianchao, TAN Ke, GU Hong. A Waveform Design for Integrated Radar and Jamming Based on Intra-Pulse and Inter-Pulse Multiple-Phase Modulation[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT250600

Citation:

ZHANG Shiyuan, LU Xingyu, YAN Huabin, YANG Jianchao, TAN Ke, GU Hong. A Waveform Design for Integrated Radar and Jamming Based on Intra-Pulse and Inter-Pulse Multiple-Phase Modulation[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT250600

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A Waveform Design for Integrated Radar and Jamming Based on Intra-Pulse and Inter-Pulse Multiple-Phase Modulation

doi: 10.11999/JEIT250600 cstr: 32379.14.JEIT250600

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Funds: The National Natural Science Foundation of China (62001229, 62101264, 62101260)

Received Date: 2025-06-25
Rev Recd Date: 2025-09-28

Available Online: 2025-10-16

Abstract

Abstract

Objective An integrated radar-jamming waveform employing multiple-phase modulation both within pulses (intra-pulse) and between pulses (inter-pulse) is proposed. The design increases the degrees of freedom in waveform synthesis compared with existing integrated signals, thereby improving joint performance in detection and jamming. In detection, phase compensation and complementary synthesis of received echoes are used to reconstruct a Linear Frequency Modulation (LFM) waveform, preserving the range resolution and ambiguity characteristics of LFM. In jamming, multi-parameter control of phase both across and within pulses allows flexible adjustment of the jamming energy distribution in the adversary’s range-Doppler map, enabling targeted energy allocation and concealment strategies. Simulation and experimental results show that the proposed waveform enhances overall detection and jamming performance relative to conventional integrated designs. Methods An integrated waveform that combines intra-pulse and inter-pulse multi-phase modulation is proposed. Carefully designed inter-pulse phase perturbations are introduced to prevent jamming energy from concentrating at zero Doppler and to allow precise control of the Doppler distribution of the jamming signal. During echo processing, the inter-pulse perturbations are removed by phase compensation so that inter-pulse complementarity reconstructs a continuous LFM waveform, thereby preserving detection performance. Each pulse is encoded with a binary phase-coded sequence, and additional phase modulation is applied between pulses. The resulting waveform has multiple tunable parameters and increased degrees of freedom, achieves low-sidelobe detection comparable to LFM, and permits flexible allocation of jamming energy across the range-Doppler plane. Results and Discussions The proposed integrated waveform is evaluated through simulations and practical experiments. Detection performance is significantly enhanced, with the Signal-to-Clutter-Noise Ratio (SCNR) for moving-target detection reaching 63.46 dB, representing a 25.25 dB improvement over conventional integrated waveforms and only 3.57 dB lower than that of a reference LFM signal (67.03 dB). These findings demonstrate that phase compensation and inter-pulse complementarity effectively enhance target detectability. Jamming performance is governed by the range of inter-pulse random phase perturbations. When the perturbation range is 0°, jamming energy is concentrated in the zero-Doppler main lobe, resulting in limited target masking. Expanding the range to ±90° flattens the Doppler spectrum and substantially weakens the target signature. Further extending the range to ±180° eliminates the zero-frequency main peak and achieves near-uniform diffusion of jamming energy across the Doppler domain. Therefore, by varying the inter-pulse phase range, continuous adjustment between concentrated and distributed jamming energy allocation is achieved. Overall, the waveform maintains detection performance comparable to that of optimal LFM signals while enabling flexible, parameterized control of jamming energy distribution. This design provides an adaptable solution for integrated radar-jamming systems that achieves a balance between efficient detection and adaptive jamming capability. Conclusions This study is based on a previously proposed integrated radar-jamming waveform and focuses on solving the problem of uneven jamming energy distribution in the unoptimized design. An integrated radar-jamming waveform based on combined intra-pulse and inter-pulse multiple-phase modulation is proposed by introducing random phase modulation between pulses. The proposed waveform achieves detection performance comparable to that of LFM signals and provides flexible control of jamming effects through multiple adjustable parameters, offering high design freedom. Theoretical analysis shows that intra-pulse modulation alone is insufficiently adaptable. The addition of random inter-pulse phases with variable distribution ranges enables more precise regulation of jamming energy diffusion. Simulation results indicate that increasing the range of inter-pulse phase perturbation leads to progressively wider diffusion of jamming energy, while detection performance remains similar to that of LFM. Therefore, by adjusting the distribution range of inter-pulse phases, the jamming energy pattern can be flexibly shaped, providing greater degrees of freedom in waveform design. Experimental results verify that the proposed waveform exhibits good overall performance in both detection and jamming. However, its practical application remains limited by specific operational conditions, which will be addressed in future studies.
- Radar detection and jamming integration,
- Waveform design,
- Phase modulation,
- Phase compensation

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References(21)

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