A novel approach to control the sidelobe levels in OFDM radar waveform design using hybrid of sub-carrier weighting and time domain windowing
by C.G. Raghavendra; D. Ashish; V.S.S.P.K. Chitirala Chaitanya
International Journal of Wireless and Mobile Computing (IJWMC), Vol. 25, No. 4, 2023

Abstract: Taking advantage of Orthogonal Frequency Division Multiplexing (OFDM), a novel waveform is developed, which performs well for radar communications. A major bottleneck of using OFDM is Out-of-Band (OOB) radiations which weakens the ability of radar systems. To successfully design an OFDM system, it is necessary to curtail the sidelobe levels of OFDM signals. We propose a technology to deal with such issues. In this paper a novel technique for reducing the sidelobes in OFDM radar signals is projected and examined. Sub-carrier weighting technique is the method used to scale down the sidelobe peaks by multiplying real valued weighting coefficients with the used sub-carriers. In order to obtain optimal sub-carrier, further it is subjected to windowing. The proposed scheme is the hybrid of sub-carrier weighting associated with pattern-based schemes and time domain windowing which enhances the performance of OFDM radar signal. To validate the merit of the proposed radar waveform, we have obtained numerous simulation results to correlate with existing radar waveform. The results demonstrate that proposed OFDM waveform shows the superiority in functioning with reduction in sidelobe levels.

Online publication date: Fri, 08-Dec-2023

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