Multi‐carrier radar waveforms for communications and detection

Ellinger, John; Zhang, Zhiping; Wicks, Michael C.; Wu, Zhiqiang

doi:10.1049/iet-rsn.2016.0244

Cited by 12 publications

(5 citation statements)

References 21 publications

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“…where M b represents the mainlobe width of C xx (τ ). (11) demonstrates that ISLR is the energy ratio between the sidelobes and the mainlobe of C xx (τ ) in essence. Besides, it is revealed that minimizing ISLR can be approximated by minimizing the following expression:…”

Section: Radar Metric 2: Islrmentioning

confidence: 99%

“…Due to the tremendous growth of radar and communication devices, waveform design for Joint radar and communication (JRC) system has drawn much attention in recent years [ 1‐12 ] . Current literatures mainly concentrate on the spectrum sharing [ 2 ] between radar and communication systems in a coexistence [ 3 , 4 , 12 ] or cooperative [ 5‐7 ] scenario.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we propose a waveform design scheme of Multicarrier phase‐coded (MCPC) [ 11 , 32 , 33 ] pulse train for JRC system with two steps. The proposed scheme is possible to be applied for multicarrier‐based mmWave vehicular sensing and communications, passive sensing using communication source, and IEEE802.11ax/ay‐based WiFi sensing, etc.…”

Section: Introductionmentioning

confidence: 99%

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A Multicarrier Phase‐Coded Waveform Design Scheme for Joint Radar and Communication System

Zhang

Wang

2021

Chinese J of Electronics

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A Multicarrier phase-coded (MCPC) waveform design scheme with two steps for Joint radar and communication (JRC) system is developed. Firstly, an integrated MCPC waveform design method is addressed by simultaneously maximizing the Signal-to-clutter-to-noise ratio (SCNR) and the Shannon capacity, subject to both the Integrated sidelobe level ratio (ISLR) constraint and the energy constraint. This model is theoretically proved to be a convex optimization problem with respect to the absolute squares of the transmit weights corresponding to different subcarriers, of which the analytical result is also discussed. Subsequently, by further optimizing the phases of the transmit weights, minimizing the Peak to average power ratio (PAPR) for JRC system is recast as a Semidefinite programming (SDP) problem, which can be effectively solved with the Semidefinite relaxation (SDR) technique via Eigenvalue decomposition (EVD) or Complex Gaussian randomization (CGR). Numerical examples are provided to verify the effectiveness of the proposed scheme.

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Section: Radar Metric 2: Islrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Multicarrier Phase‐Coded Waveform Design Scheme for Joint Radar and Communication System

Zhang

Wang

2021

Chinese J of Electronics

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“…, Q − 1. To note that, in (17), (18) and (22), (µ, ν) are all calculated following (10). In order to take advantage of the beamforming gain and reduce the matrix dimension, we examine Z to choose a small set of target beams and drop the noise beams, before the noise subspace and MUSIC spectrum estimation.…”

Section: B Imaging Via 2d Rd-bs-umusicmentioning

confidence: 99%

A Novel High-Resolution Imaging Method Using Reduced-Dimension Beamspace Unitary MUSIC for OFDM-MIMO Radar

et al. 2020

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Imaging of maneuvering targets has become a challenging topic recently. This study proposes an improved MUSIC-based single-snapshot imaging method for OFDM-MIMO radar. At the transmitter part, for orthogonal waveform generation, the interleaved OFDM structure is developed that each transmitter only radiates at an equidistant set of OFDM subcarriers unique to itself. At the receiver part, a novel preprocessing scheme is presented to separate multiple transmit/receive paths and compensate the reference point. Preprocessed echo matrix can fit the model of two-Dimensional (2D) MUSIC algorithm, except for the coupling between radial/cross-range in the virtual antenna array. Correspondingly, we modify the 2D ElementSpace (ES)-MUSIC. In the meantime, a 2D Reduced-Dimension BeamSpace Unitary-MUSIC (RD-BS-UMUSIC) algorithm is proposed for computational complexity reduction and estimation performance enhancement. Numerical results of a simulated target consists of limited number of scatterers and a complex target (a Boeing 737-800 plane) verify that the proposed algorithm can improve the imaging quality and reduce computational complexity effectively compared with the traditional method. INDEX TERMS High-resolution imaging, OFDM-MIMO radar, single-snapshot imaging, 2D modified ES-MUSIC, 2D RD-BS-UMUSIC.

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“…However, this will cause complexity on the transceiver, which is not suitable for small and intensive equipment. As for the waveform design, a multi-frequency complementary phase-encoded OFDM signal is proposed to promote the ambiguity function property by adjusting the phases of multiple symbols [ 17 ]. However, the communication information can only be modulated on the whole phase of OFDM.…”

Section: Introductionmentioning

confidence: 99%

FDSS-Based DFT-s-OFDM for 6G Wireless Sensing

Chen

Pan

Zhang

et al. 2023

Sensors

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Integrated sensing and communications (ISAC) is emerging as a key technology of 6G. Owing to the low peak-to-average power ratio (PAPR) property, discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-s-OFDM) is helpful to improve the sensing range and suitable for high-frequency transmission. However, compared to orthogonal frequency-division multiplexing (OFDM), the sensing accuracy of DFT-s-OFDM is relatively poor. In this paper, frequency-domain spectral shaping (FDSS) is adopted to enhance the performances of DFT-s-OFDM including sensing accuracy and PAPR by adjusting the correlation of signals. Specifically, we first establish a signal model for the ISAC system, followed by the description of performance indicators. Then, we analyze the influence of amplitude fluctuation of frequency domain signals on sensing performance, which shows the design idea of FDSS-enhanced DFT-s-OFDM. Further, a FDSS-enhanced DFT-s-OFDM framework is introduced for ISAC, where two types of FDSS filters including a pre-equalization filter and an isotropic orthogonal transform algorithm (IOTA) filter are designed. The simulation results show that the proposed scheme can obtain about 4 dB performance gain in terms of sensing accuracy over DFT-s-OFDM. In addition, FDSS-enhanced DFT-s-OFDM can significantly reduce PAPR and improve the power amplifier efficiency.

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Multi‐carrier radar waveforms for communications and detection

Cited by 12 publications

References 21 publications

A Multicarrier Phase‐Coded Waveform Design Scheme for Joint Radar and Communication System

A Multicarrier Phase‐Coded Waveform Design Scheme for Joint Radar and Communication System

A Novel High-Resolution Imaging Method Using Reduced-Dimension Beamspace Unitary MUSIC for OFDM-MIMO Radar

FDSS-Based DFT-s-OFDM for 6G Wireless Sensing

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