A cylindrical antenna array for MIMO radar applications

Wu, Xuan Hui; Yehia, Mohamed; Abdalla, Ahmed

doi:10.1109/aps.2014.6904573

Cited by 3 publications

(3 citation statements)

References 3 publications

(5 reference statements)

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“…We can obtain the corresponding horizontal signal ỹvec,H = J H ỹvec ∈ C (2P +1)×1 . As done in (26), the covariance matrix of ỹvec,H can be calculated as…”

Section: A Wideband Jade Algorithmmentioning

confidence: 99%

“…For the proposed approach, after hybrid beamforming, the dimension of the received signal is reduced to N DS,2 , so the computational complexity of MDSL processing is O(N DS,2 M ) = O((2P + 1)N B M ) = O(γP N p M ). The computational complexities of calculating the covariance matrix, R ỹvec , in (25) and performing the EVD on R ỹvec according to (26) are O(γ 2 P 2 N 2 p M 2 T s ) and O(γ 3 P 3 N 3 p M 3 ), respectively, where T s is the number of snapshots. The complexities of computing the delay τl and the elevation angle, θR,l , are O(M N 3 p ) and O(γ 2 N 2 p + N 3 p ), respectively.…”

Section: Complexity Analysismentioning

confidence: 99%

“…In this paper, we propose a novel joint delay and angle estimation approach, which enables a hybrid UCyA to estimate the delay and the azimuth and elevation angles-of-arrival (AOAs) of every impinging path. Different from any existing works using (typically digital, narrowband) cylindrical arrays for angle estimation, such as [17], [24]- [26], our approach is designed for wideband mmWave hybrid antenna arrays, addressing the problem of beam squint and requiring far fewer RF chains than antennas. As depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Joint Estimation of Multipath Angles and Delays for Millimeter-Wave Cylindrical Arrays with Hybrid Front-ends

Lin,

Lv,

et al. 2021

Preprint

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Accurate channel parameter estimation is challenging for wideband millimeter-wave (mmWave) large-scale hybrid arrays, due to beam squint and much fewer radio frequency (RF) chains than antennas. This paper presents a novel joint delay and angle estimation approach for wideband mmWave fully-connected hybrid uniform cylindrical arrays. We first design a new hybrid beamformer to reduce the dimension of received signals on the horizontal plane by exploiting the convergence of the Bessel function, and to reduce the active beams in the vertical direction through preselection. The important recurrence relationship of the received signals needed for subspace-based angle and delay estimation is preserved, even with substantially fewer RF chains than antennas. Then, linear interpolation is generalized to reconstruct the received signals of the hybrid beamformer, so that the signals can be coherently combined across the whole band to suppress the beam squint. As a result, efficient subspace-based algorithm algorithms can be developed to estimate the angles and delays of multipath components. The estimated delays and angles are further matched and correctly associated with different paths in the presence of non-negligible noises, by putting forth perturbation operations. Simulations show that the proposed approach can approach the Cramér-Rao lower bound (CRLB) of the estimation with a significantly lower computational complexity than existing techniques.Index Terms-Millimeter-wave, large-scale antenna array, delay and angle estimation, hybrid beamforming.

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“…We can obtain the corresponding horizontal signal ỹvec,H = J H ỹvec ∈ C (2P +1)×1 . As done in (26), the covariance matrix of ỹvec,H can be calculated as…”

Section: A Wideband Jade Algorithmmentioning

confidence: 99%

Section: Complexity Analysismentioning

confidence: 99%