Optimization of Sparse Frequency Diverse Array With Time-Invariant Spatial-Focusing Beampattern

Yang, Yuqian; Wang, Hao; Gu, Siqi; Xu, Dalong; Quan, Shuanglong

doi:10.1109/lawp.2018.2789979

“…Recent theoretical works in [5]- [15] attempted to solve this problem. The proposed solutions combine DM with a Frequency Diverse Array (FDA) -a technique used in radar systems to illuminate target at a given range with a multi-frequency signal of short duration.…”

Section: Introductionmentioning

confidence: 99%

“…This paper provides the first in-depth analysis into the mechanisms of the FDA-DM security in range domain. It significantly extends the analyses provided in [5]- [15] in order to include a more generic approach with time as the third missing variable. Proposed analysis demonstrates that the so obtained security in range-domain cannot be time-invariant and that the "secure region" propagates with time.…”

Section: Introductionmentioning

confidence: 99%

Can Frequency Diverse Array Prevent Wireless Eavesdropping_for_techRxiv.pdf

Yuan¹,

Narbudowicz²

2019

Preprint

1

3

0

View full text Add to dashboard Cite

In this paper, the concept and recent development of exploiting frequency diverse array (FDA) and its variants for the physical-layer wireless security have been revisited and carefully examined. Following rigorous analytical derivation and illustrative simulations, the authors argue that the investigations performed in some recent works did not reveal one critical issue facing the real-world applications, and system models established and used before were based on an unrealistic assumption, i.e. that the legitimate and eavesdropping users at different ranges sample the signal waveforms at the same time instant. This misunderstanding results in conclusions that are misleading. The authors aim to take the first step to divert research efforts and rectify the previous problematic analyses. The authors prove that the FDA cannot secure a free-space wireless transmission in range domain, because the previously claimed ‘secure reception region’ propagates in range domain as time elapses.

show abstract

“…Based on the above analyses, the conclusions reached in some previous FDA works [5]- [15], [25] are unreliable.…”

Section: Secure Reception Regions 'Propagate' In Range As Time Elamentioning

confidence: 90%

Can Frequency Diverse Array Prevent Wireless Eavesdropping_for_techRxiv.pdf

Ding¹,

Narbudowicz²

2019

Preprint

0

View full text Add to dashboard Cite

In this paper, the concept and recent development of exploiting frequency diverse array (FDA) and its variants for the physical-layer wireless security have been revisited and carefully examined. Following rigorous analytical derivation and illustrative simulations, the authors argue that the investigations performed in some recent works did not reveal one critical issue facing the real-world applications, and system models established and used before were based on an unrealistic assumption, i.e. that the legitimate and eavesdropping users at different ranges sample the signal waveforms at the same time instant. This misunderstanding results in conclusions that are misleading. The authors aim to take the first step to divert research efforts and rectify the previous problematic analyses. The authors prove that the FDA cannot secure a free-space wireless transmission in range domain, because the previously claimed ‘secure reception region’ propagates in range domain as time elapses.

show abstract

“…For the FDA radar, the frequencies of each transmitting array element are different, which can lead to a range-angle-dependent beampattern [21]. Then, joint angle and range can be estimated simultaneously in the FDA radar [22][23][24]. Nevertheless, the resolution of parameter estimation is influenced by the maximum frequency increment and the array aperture [25].…”

Section: Introductionmentioning

confidence: 99%

A Novel Unitary ESPRIT Algorithm for Monostatic FDA-MIMO Radar

Liu

¹

,

Wang

²

,

Huang

³

et al. 2020

Sensors

View full text Add to dashboard Cite

A novel unitary estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm, for the joint direction of arrival (DOA) and range estimation in a monostatic multiple-input multiple-output (MIMO) radar with a frequency diverse array (FDA), is proposed. Firstly, by utilizing the property of Centro-Hermitian of the received data, the extended real-valued data is constructed to improve estimation accuracy and reduce computational complexity via unitary transformation. Then, to avoid the coupling between the angle and range in the transmitting array steering vector, the DOA is estimated by using the rotation invariance of the receiving subarrays. Thereafter, an automatic pairing method is applied to estimate the range of the target. Since phase ambiguity is caused by the phase periodicity of the transmitting array steering vector, a removal method of phase ambiguity is proposed. Finally, the expression of Cramér–Rao Bound (CRB) is derived and the computational complexity of the proposed algorithm is compared with the ESPRIT algorithm. The effectiveness of the proposed algorithm is verified by simulation results.

show abstract

Optimization of Sparse Frequency Diverse Array With Time-Invariant Spatial-Focusing Beampattern

Cited by 51 publications

References 10 publications

Can Frequency Diverse Array Prevent Wireless Eavesdropping_for_techRxiv.pdf

Can Frequency Diverse Array Prevent Wireless Eavesdropping_for_techRxiv.pdf

Can Frequency Diverse Array Prevent Wireless Eavesdropping_for_techRxiv.pdf

A Novel Unitary ESPRIT Algorithm for Monostatic FDA-MIMO Radar

Contact Info

Product

Resources

About