Modified Radar Signal Model using NLFM
N. Adithya Valli1, D. Elizabath Rani2, C. Kavitha3

1N. Adithya Valli, Research Scholar, Department of Electronics and Communication Engineering, Gitam University, Vishakhapatnam (A.P), India.
2D. Elizabath Rani, Professor, Department of Electronics and Instrumentation Engineering, Gitam University, Vishakhapatnam (A.P), India.
3C. Kavitha, Associate Professor, Department of Physics, Gitam University, Vishakhapatnam (A.P), India.
Manuscript received on 19 July 2019 | Revised Manuscript received on 03 August 2019 | Manuscript Published on 10 August 2019 | PP: 513-516 | Volume-8 Issue-2S3 July 2019 | Retrieval Number: B10910782S319/2019©BEIESP | DOI: 10.35940/ijrte.B1091.0782S319
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Abstract: Intended to the setback of high side lobes of the linear frequency modulation (LFM) signal, we put forward a new signal model using nonlinear frequency (NLFM) signal to overcome the issue. NLFM is a promising way for achieving lower signal to noise ratio, good resolution and better interference mitigation. The novel signal model is designed to enhance the target range estimation and to reduce the side lobe levels. In this paper, a new signal model is designed based on the principle of fusion of two stages. First stage is exponential based nonlinear function and the second stage is a linear function. The simulations were performed for the designed signal model and are compared with the NLFM signal designed using two stage LFM functions. Simulation results show that the designed signal has significant reduction in side lobe levels of the matched filter response.
Keywords: LFM, NLFM, PSLR, Side Lobes.
Scope of the Article: Digital Signal Processing Theory