A waveform design method for suppressing range sidelobes in desired intervals

In this paper, we study the joint design of transmitted sequence and receiving filter to improve the performance of radar in the presence of Doppler shifts. The mean-square error (MSE) of the estimates of the scattering coefficients of the pointlike targets is considered to be the figure of merit. The design problem is cast as a joint optimization problem to minimize the MSE in the presence of target and clutter Doppler shifts. To tackle the design problem, we devise a new data model with respect to the Doppler shifts and propose a cyclic iterative approach to obtain optimized pairs for receiving filters and transmitted sequences. The proposed approach is based on fractional programming and iterations of the power method, and this approach is computationally efficient. Moreover, this approach can handle unimodularity constraints, quantization constraints, and peak-to-average power ratio constraints on the transmitted sequence. Simulation examples show the effectiveness of the proposed approach.

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“…We assume that {x n } N n=1 is the transmitted sequence to be designed, and we stack the samples in a N × 1 vector as [8,10,15] x = x 1 x 2 . .…”

Section: Problem Formulationmentioning

confidence: 99%

“…Note that μ, Ω c and Γ can also be obtained by some pre-scan procedures and are generally assumed to be available in cognitive radar (see [7]). Therefore, by substituting (12) and (15) into (10), the MSE that corresponds to the estimation of α l can be rewritten as…”

Section: Problem Formulationmentioning

confidence: 99%

Joint Design of Transmitted Sequence and Receiving Filter in the Presence of Doppler Shifts

Song

Fan

et al. 2015

Circuits Syst Signal Process

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“…Furthermore, Costas is a coding approach which is a time-based frequency coded waveform which has compared here with pulse compression based radar with low side lobes (Farnane et al, 2015;Li, Zhao, & Qiao, 2014). By MATLAB, results show that the ratio of average power with peak reduced considerably as compared with the conventional method.…”

Section: Introductionmentioning

confidence: 99%

Neutrosophic data formation using Gaussian filter based costas coding for wireless communication systems

Ajith¹,

Latha

2019

Cognitive Systems Research

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Outstanding advantages of OFDM helps high data rate communication systems such as Digital Video Broadcasting (DVB) and mobile worldwide interoperability for microwave access (mobile Wi-MAX). But, OFDM system grieves from grave issue of high PAPR. In OFDM system data output is superposition of multiple sub-carriers and leads to big data. In this case some instantaneous power output might increase greatly and become far higher than the mean power of system. In order to make Neutrosophic data for less PAPR criteria, Gaussian filter based Costas coding is proposed. This paper also proposes feeding the Orthogonal Frequency Division Multiplexed signal (OFDM) into a phase accumulator to obtain frequency modulation, with the aim of reducing the peak to average power ratio (PAPR). For associated radar with modulated waveform mentioned here can be used to enhance the performance. It is widely used to analyze the variation of the output waveform further, the implementation results using MATLAB show that the ratio of average power to peak power is reducing considerably in comparing with the conventional method. Consequently; the signal can assume to fade in a frequency selective channel without an equalizer.

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“…The design of radar waveforms to optimize the radar's performance is a longstanding research topic in Single Input Single Output (SISO) scenario (see e.g., [8][9][10][11][12][13][14]). Subsequently, several papers have been published on the topic of MIMO radar waveform design.…”

Section: Introductionmentioning

confidence: 99%

MIMO radar signal design to improve the MIMO ambiguity function via maximizing its peak

et al. 2016

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A waveform design method for suppressing range sidelobes in desired intervals

Cited by 35 publications

References 36 publications

Joint Design of Transmitted Sequence and Receiving Filter in the Presence of Doppler Shifts

Joint Design of Transmitted Sequence and Receiving Filter in the Presence of Doppler Shifts

Neutrosophic data formation using Gaussian filter based costas coding for wireless communication systems

MIMO radar signal design to improve the MIMO ambiguity function via maximizing its peak

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