A two-dimensional direction-of-arrival(DOA) estimation method for non-uniform two-L-shaped array is presented in which the element spacing is larger than half-wavelength. To extract automatically paired low-variance c...A two-dimensional direction-of-arrival(DOA) estimation method for non-uniform two-L-shaped array is presented in which the element spacing is larger than half-wavelength. To extract automatically paired low-variance cyclically ambiguous direction cosines and high-variance unambiguous direction cosines from the sub-blocks, the proposed method constructs and partitions the cross-correlation matrices. Then, the low-variance unambiguous direction cosines are obtained using the ambiguity resolved technique. Simulation results demonstrate that the proposed method has lower computation complexity and higher resolution than the existing methods especially when the elevation angles are between 70 and 90 degrees.展开更多
In October, 1998, Ted Hughes, the great English poet and writer died of cancer at the age of 68. From 1957 to 1998, Hughes published numerous books of poetry and received various awards including the prestigious Whitb...In October, 1998, Ted Hughes, the great English poet and writer died of cancer at the age of 68. From 1957 to 1998, Hughes published numerous books of poetry and received various awards including the prestigious Whitbread Poetry Award. He was appointed Poet Laureate in 1984 and given Merit of Order shortly before his death. He was generally regarded, with Philip Larkin, as one of the two most important English poets since the Second展开更多
基金supported by the Joint Laboratory for Ocean Observation and Detectionthe National Laboratory for Marine Science and Technology
文摘A two-dimensional direction-of-arrival(DOA) estimation method for non-uniform two-L-shaped array is presented in which the element spacing is larger than half-wavelength. To extract automatically paired low-variance cyclically ambiguous direction cosines and high-variance unambiguous direction cosines from the sub-blocks, the proposed method constructs and partitions the cross-correlation matrices. Then, the low-variance unambiguous direction cosines are obtained using the ambiguity resolved technique. Simulation results demonstrate that the proposed method has lower computation complexity and higher resolution than the existing methods especially when the elevation angles are between 70 and 90 degrees.
文摘In October, 1998, Ted Hughes, the great English poet and writer died of cancer at the age of 68. From 1957 to 1998, Hughes published numerous books of poetry and received various awards including the prestigious Whitbread Poetry Award. He was appointed Poet Laureate in 1984 and given Merit of Order shortly before his death. He was generally regarded, with Philip Larkin, as one of the two most important English poets since the Second
