The unifying role of the coarray in aperture synthesis for coherent and incoherent imaging

Hoctor, R.T.; Kassam, S.A.

doi:10.1109/5.54811

Cited by 431 publications

(261 citation statements)

References 38 publications

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“…The number of sources that can be resolved by an -element ULA phased-array using conventional subspace-based methods is − 1. However, according to the difference coarray scheme [32], the maximum attainable number of DOFs, denoted by DOF max , is…”

Section: Phased-mimomentioning

confidence: 99%

“…According to the difference coarray processing algorithm [32], we can get the autocorrelation matrix ofỹ as…”

Section: Subarray 1 Subarray 2 Subarraymentioning

confidence: 99%

“…Moreover, it is not easy to extend them to any arbitrary array size. To mitigate these weaknesses, the authors of [29][30][31] propose a nested-array based on the concept of difference coarray [32], but there are no studies on the joint transmit and receive array design.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Joint Phased-MIMO and Nested-Array Beamforming for Increased Degrees-of-Freedom

Zhu

Chen

Shao

2015

International Journal of Antennas and Propagation

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Phased-multiple-input multiple-output (phased-MIMO) enjoys the advantages of MIMO virtual array and phased-array directional gain, but it gets the directional gain at a cost of reduced degrees-of-freedom (DOFs). To compensate the DOF loss, this paper proposes a joint phased-array and nested-array beamforming based on the difference coarray processing and spatial smoothing. The essence is to use a nested-array in the receiver and then fully exploit the second order statistic of the received data. In doing so, the array system offers more DOFs which means more sources can be resolved. The direction-of-arrival (DOA) estimation performance of the proposed method is evaluated by examining the root-mean-square error. Simulation results show the proposed method has significant superiorities to the existing phased-MIMO.

show abstract

Section: Phased-mimomentioning

confidence: 99%

“…According to the difference coarray processing algorithm [32], we can get the autocorrelation matrix ofỹ as…”

Section: Subarray 1 Subarray 2 Subarraymentioning

confidence: 99%

See 1 more Smart Citation

Joint Phased-MIMO and Nested-Array Beamforming for Increased Degrees-of-Freedom

Zhu

Chen

Shao

2015

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

show abstract

“…The expression (4) shows that in the far-field the transmitter-receiver array data is equivalent to the array of receivers located at the points rm with one transmitter at the origin [2,3]. This effective receiver array is called a coarray [2] or effective aperture [3].…”

Section: Introductionmentioning

confidence: 99%

“…In the far-field of the array the frequency spectrum of transmitter-receiver signal can be written as [2][3][4] ( ) ( ) exp exp 2…”

Section: Introductionmentioning

confidence: 99%