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ULAUniversidad de Los Andes
ULAUnited Launch Alliance
ULAUsb Linker Advance
ULAUpper Layer Address
ULAup Level Addressing
ULAUltra-High Purity
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ULAUncommitted Logic Array
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ULAUniversity of Lapland (Finland)
ULAUpper Latch Auxiliary
ULAunidade de lógica e aritimética (arithmetic logic unit)
ULAUnderwater Location Aid (NASA)
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References in periodicals archive ?
Therefore, the spacing of adjacent element in conventional uniform linear array has to be no more than half wavelength for avoiding ambiguity in DOA estimation.
An 8-element uniform linear array with 1m interelement spacing, which is half-wavelength of the received narrowband signal with center frequency 750Hz, is considered here.
Caption: Figure 1: Uniform linear array signal model.
Note that, for simultaneous estimation of the azimuth and the elevation, the uniform linear array (ULA) cannot be adopted since ULA-based algorithm cannot uniquely estimate the azimuth and the elevation due to the ambiguity pertinent to the ULA structure.
Compared to the uniform linear array (ULA), we can obtain more accurate angle estimation.
Uniform linear array shows the respective SLL values as -12.97 dB, -13.11 dB, and -13.20 dB.
Svantesson, "Modeling and estimation of mutual coupling in a uniform linear array of dipoles," in 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing.
Woerner, "BER performance of a uniform circular array versus a uniform linear array in a mobile radio environment," IEEE Trans.
From Figures 3 and 4, it is clear that the uniform linear array (ULA) geometry of subarrays produces many ripples with no considerable main beams, as in the case of rectangular geometry, which produces multiple beams with reasonable gain.
According to the equivalent phase center theorem, the sparse linear array with multiple transmitting array elements and multiple receiving array elements on the basis of time division can be equivalent to a uniform linear array that every equivalent array element transmits and receives signal by itself [12].
The work [13] developed a low-complexity noncircular rational invariance propagator method (NC-RI-PM) for angle estimation, which is used for uniform linear array (ULA).
[6] put forward several kinds of uniform linear array low side lobe pattern synthesis algorithms.
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