نتایج جستجو برای: uniform linear array ula
تعداد نتایج: 705876 فیلتر نتایج به سال:
Software radio implementations of beamformers on programmable processors such as digital signal processor (DSP) and field programmable gate array (FPGA) still remain as a challenge for the integration of smart antennas into existing wireless base stations for 3G systems. This study presents the comparison of DSPand FPGA-based implementations of space–code correlator (SCC) beamformer, which is p...
Multiple input single output (MISO) point-to-point communication system is considered where the transmitter is designed such that, each antenna can transmit information or harvest energy at any given point in time. We evaluate the achievable rate by this system, subject to an average power constraint and show that, by careful switching of antennas between transmission and harvesting modes, it i...
Land mobile satellite can exploit multiple input multiple output techniques to achieve high transmission rates. This article evaluates, theoretically, the capacity of the single input multiple output system utilizing uniform linear arrays at the receiver terminal for satellite applications. The theoretical study is performed at C-band and accounts for different shadowing conditions. Additionall...
Wireless communications exploits the electromagneticmedium,which is intrinsically polarization-sensitive. Much wireless technology, however, has been devised without explicit consideration of polarization. Past decades of wireless technology has mainly exploited the dimensions of time, frequency and space. As such, polarization is a logical next step in this progression. This special issue focu...
This work provides an explanatory analysis of the influence input parameters on performance subspace-based Direction Arrival (DoA) estimation algorithms. The objective this is twofold. First, to drive a Steering Vector (SV) that works for arbitrary array configuration rather than just Uniform Linear Array (ULA) geometry. Second, identify how algorithms affected by tuning parameters. later cruci...
In high resolution methods applied to Uniform Linear Arrays (ULA), the pre-processing that consists in forcing the estimated Cross Spectral Matrix (CSM) to be Toeplitz by averaging its elements along its diagonals is known to increase drastically the resolving power: that is why it is always done in practise. However, this approach is limited to linear arrays because of the required Toeplitz st...
This paper investigates a multi-user massive multiple-input multiple-output (MU-mMIMO) hybrid precoding (HP) scheme using low-resolution phase shifters (PSs) and digital-to-analog converters (DACs). The proposed HP approach involves two stages: RF beamforming based on the slowly time-varying channel second-order correlation matrix, baseband MU instantaneous effective to mitigate MU-interference...
DESIGN OF NON-UNIFORM LINEAR ARRAY VIA LINEAR PROGRAMMING AND PARTICLE SWARM OPTIMIZATION AND STUDIES ON PHASED ARRAY CALIBRATION
In this paper, a reduced-rank angular parameters estimation algorithm is proposed for incoherently distributed (ID) noncircular sources based on uniform linear array (ULA), which addresses the problems of central direction-of-arrival (DOA) and spread estimation. Firstly, noncircularity property signals utilized to establish an extended generalized manifold (GAM) model first-order Taylor series ...
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