Waveform design for communicating radar systems using Fractional Fourier Transform

Gaglione, Domenico; Clemente, Carmine; Ilioudis, Christos; Persico, Adriano Rosario; Proudler, Ian K.; Soraghan, John J.; Farina, A.

doi:10.1016/j.dsp.2018.05.002

Cited by 53 publications

(22 citation statements)

References 24 publications

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“…τ d will be frequently used in the following contents. Finally, the Doppler frequency error of signal (10) estimated through (15) and (16), f , is given by…”

Section: A Definition Of Frftmentioning

confidence: 99%

“…where x denotes the input unknown variable. Referring to (16), the worst resolution for frequency, δu R , satisfies [15], [38]…”

Section: Optimal Frft Order Binmentioning

confidence: 99%

“…The digital computation of the FRFT was published by Ozaktas et al [15]. The FRFT was a widely used tool in radar [16]- [20], image processing [21], [22], communications [23], [24], in which the signal is formed with linear frequency modulation (LFM), and it is still currently a powerful tool for different applications [25]- [28].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Doppler Rate Estimator Based on Fractional Fourier Transform for High-Dynamic GNSS Signal

Luo

Chen

et al. 2019

IEEE Access

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When the fractional Fourier transform (FRFT) is introduced into the weak and high-dynamic global navigation satellite system (GNSS) signal acquisition, the 2-D search cell will be transferred to a 3-D one with respect to the code chip, the Doppler shift, and the Doppler rate. The proper determinations of the code bin and Doppler shift bin in the acquisition process have already been covered in the previous researches. The aim of this paper is to provide an exhaustive analysis of the approach to specify an optimal FRFT order bin, in terms of the Doppler shift rate. The lower and upper bound of FRFT order ranges is determined by the incoming signal dynamics. Then, we propose a precise model to yield an optimal FRFT order bin. Besides, a novel and fast Doppler estimator based on the non-linear least square (NLS) method is presented to improve the performance of the digital FRFT implementation. Finally, an alternate search procedure is proposed to reduce the singular estimations of the NLS method. The simulating examples demonstrate the performance of the proposed algorithms. It has been verified that the computation efficiency and the estimation accuracy have been significantly improved by proposed techniques. INDEX TERMS Global navigation satellite system (GNSS) signal, linear frequency modulation (LFM), fractional Fourier transform (FRFT) order, acquisition, Doppler rate, non-linear least square (NLS).

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“…τ d will be frequently used in the following contents. Finally, the Doppler frequency error of signal (10) estimated through (15) and (16), f , is given by…”

Section: A Definition Of Frftmentioning

confidence: 99%

“…where x denotes the input unknown variable. Referring to (16), the worst resolution for frequency, δu R , satisfies [15], [38]…”

Section: Optimal Frft Order Binmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Doppler Rate Estimator Based on Fractional Fourier Transform for High-Dynamic GNSS Signal

Luo

Chen

et al. 2019

IEEE Access

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“…In [1] a new joint radar communication system based on the Fractional Fourier Transform (FrFT) was proposed. It was shown that the radar performance in terms of the Ambiguity Function (AF) and Side Lobe Levels is similar to the Linear Frequency Modulation (LFM) waveform.…”

Section: Introductionmentioning

confidence: 99%

Interference Mitigation for a joint radar communication system based on the FrFT for Automotive Applications

Striano

Ilioudis

Cao

et al. 2020

2020 IEEE International Radar Conference (RADAR)

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In multi user scenarios to prevent interference between users that share the same bandwidth at the same time, each user has to transmit waveforms that are uncorrelated with those of other users. However, due to spectrum limitations, the uncorrelated property cannot always be satisfied meaning that interference is unavoidable. In order to alleviate the interference, a framework for interference mitigation is presented. The performance of the proposed framework is tested on simulated and real signals. The real signal is acquired in a controlled laboratory environment using a Software Defined Radio (SDR). The simulated and experimental results show that the proposed framework is capable of mitigating the interference from other users.

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“…In [1], [2], the authors presented a joint radarcommunication system based on Orthogonal Frequency-Division Multiplexing (OFDM) for automotive application, which is able to reach a very high bit rate of 20 Mb/s. In [3] the Fractional Fourier Transform (FrFT) was shown to be suitable for orthogonal waveforms generation for MIMO radar systems, while in [4] a joint radarcommunication system based on FrFT designed waveform was presented. This system does not fit the standards of automotive radar and communication as it employs pulsed waveforms instead of Continuous Waveform (CW), which is more suitable for short range applications [5].…”

Section: Introductionmentioning

confidence: 99%

Performance of a Communicating Radar using FSK and Fractional Fourier Transform for Automotive Applications

Striano

Ilioudis

Clemente

et al. 2019

2019 IEEE Radio and Wireless Symposium (RWS)

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In automotive environment, it is preferable to have a joint radar and communication system as it is able to use the same hardware and band of the spectrum for both systems. In this paper a joint radar communication system for automotive radar based on the Fractional Fourier Transform (FrFT) is presented. The performance of the system is analysed in the presence of interference arising from other users. In addition, the communication performance in terms of Bit Error Rate (BER), is analysed for different scenarios. Simulation results demonstrate the potential of the proposed system in multiuser scenarios and in different types of communication channels.

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Waveform design for communicating radar systems using Fractional Fourier Transform

Cited by 53 publications

References 24 publications

A Novel Doppler Rate Estimator Based on Fractional Fourier Transform for High-Dynamic GNSS Signal

A Novel Doppler Rate Estimator Based on Fractional Fourier Transform for High-Dynamic GNSS Signal

Interference Mitigation for a joint radar communication system based on the FrFT for Automotive Applications

Performance of a Communicating Radar using FSK and Fractional Fourier Transform for Automotive Applications

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