Quartic Gradient Descent for Tractable Radar Slow-Time Ambiguity Function Shaping

Alhujaili, Khaled; Monga, Vishal; Rangaswamy, Muralidhar

doi:10.1109/taes.2019.2934336

Cited by 30 publications

(24 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Category 1: [12], [18]; Category 2: [19]- [21]; Category 3: [22], [23]; Category 4: [7]- [11]; Category 5: [13]- [15], [17], [24]- [27], [27]- [35], [36]. consider using constant modulus, unimodular and related peak to average ratio (PAR) as constraints for various applications including ambiguity function design [9], [13]- [16] . However, the use of constant modulus signals for time-multiplexed architectures imposes a non-convex constraint on the waveform structure and complicates the design procedure.…”

mentioning

confidence: 99%

Generalized Multiplexed Waveform Design Framework for Cost-Optimized MIMO Radar

Hammes

Shankar

Ottersten

2021

IEEE Trans. Signal Process.

View full text Add to dashboard Cite

Cost-optimization through the minimization of hardware and processing costs with minimal loss in performance is an interesting design paradigm in evolving and emerging Multiple-Input-Multiple-Output (MIMO) radar systems. This optimization is a challenging task due to the increasing Radio Frequency (RF) hardware complexity as well as the signal design algorithm complexity in applications requiring high angular resolution. Towards addressing these, the paper proposes a low-complexity signal design framework, which incorporates a generalized time multiplex scheme for reducing the RF hardware complexity with a subsequent discrete phase modulation. The scheme further aims at achieving simultaneous transmit beamforming and maximum virtual MIMO aperture to enable better target detection and discrimination performance. Furthermore, the paper proposes a low-complexity signal design scheme for beampattern matching in the aforementioned setting. The conducted performance evaluation indicates that the listed design objectives are met.

show abstract

mentioning

confidence: 99%

Generalized Multiplexed Waveform Design Framework for Cost-Optimized MIMO Radar

Hammes

Shankar

Ottersten

2021

IEEE Trans. Signal Process.

View full text Add to dashboard Cite

show abstract

“…Some studies have focused on shaping the AF of agile waveforms in sensing. In the works [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], the dynamic selection of waveforms for target tracking was considered, and the optimal waveform parameters were derived for tracking target motion using a linear/nonlinear observations model with detection in a clutter/clutter-free environment. In [ 14 ], a kind of efficient gradient method was proposed for designing AFs for multistatic primary surveillance radar systems.…”

Section: Introductionmentioning

confidence: 99%

Sequence Set Design for a New LFM-PC Hybrid Modulated Radar Signal

Wang

Zhang

et al. 2021

Sensors

View full text Add to dashboard Cite

In this paper we study the code design problem of a new form of linear frequency modulation phase-coded (LFM-PC) hybrid signal with wide Doppler tolerance based on a range-Doppler discrete ambiguity function (DAF) to get better detection performance and anti-jamming capability. The DAF of the LFM-PC inter pulse signal is derived within the Doppler tolerance. Two optimization models are established. One is single pulse sequence design (SSD) for Doppler tolerance extension based on minimum integral normalized sidelobe level (INSL); the other is multi pulse sequence set design (MSSD) for signal orthogonality based on the minimizing sum of the normalized DAF sidelobe (NDAFSL) and discrete cross ambiguity function (DCAF). Two low-complexity signal optimization methods based on alternating direction method of multiplier (ADMM) are proposed, respectively. The simulation results show that the optimized signals have either wide Doppler tolerance or good orthogonal performance, and the optimization methods (i.e., SSD-ADMM and MSSD-ADMM) have the characteristics of fast convergence speed and low operation amount.

show abstract

“…In recent years, extensive research has been carried out in the radar transmit waveform design area. In [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ], in order to solve the problem of target masking caused by high sidelobes in the range-Doppler domain, different optimization algorithms have been designed for sidelobe suppression. Tao Fan [ 15 ] et al designed a Doppler filter bank for non-uniform pulse repetition interval (PRI) radar to suppress clutters.…”

Section: Introductionmentioning

confidence: 99%

Hybrid FSK-PSK Waveform Optimization for Radar Based on Alternating Direction Method of Multiplier (ADMM)

Fei

Zhao

Geng

et al. 2021

Sensors

View full text Add to dashboard Cite

In this paper, a new radar signal modulated with a hybrid of the frequency shift keying (FSK) and the phase shift keying (PSK) signal—i.e., the FSK-PSK signal—is studied. Different phase encoding sequences are used to modulate the sub-pulses to obtain lower sidelobe levels and ensure signal orthogonality. In addition, to counter intra-pulse slice repeater jamming of specific length generated by the enemy jammer, an orthogonal waveform made of sub-pulses of equal length based on the FSK-PSK modulation scheme is designed. The simulation results show that the optimized discrete phase encoding sequence can significantly enhance the orthogonality of the sub-pulse in the FSK-PSK signal and effectively suppress the slice repeater jamming. Two algorithms are proposed: (1) the low sidelobe waveform optimization algorithm based on ADMM (LSW-ADMM); and (2) the anti-slice-repeater-jamming algorithm based on ADMM (ASRJ-ADMM). Both algorithms exhibit fast convergence speed and low computational complexity.

show abstract

Quartic Gradient Descent for Tractable Radar Slow-Time Ambiguity Function Shaping

Cited by 30 publications

References 41 publications

Generalized Multiplexed Waveform Design Framework for Cost-Optimized MIMO Radar

Generalized Multiplexed Waveform Design Framework for Cost-Optimized MIMO Radar

Sequence Set Design for a New LFM-PC Hybrid Modulated Radar Signal

Hybrid FSK-PSK Waveform Optimization for Radar Based on Alternating Direction Method of Multiplier (ADMM)

Contact Info

Product

Resources

About