In this paper, the problem of spatial signature estimation using a uniform linear array (ULA) with unknown sensor gain and phase errors is considered. As is well known, the directions-of-arrival (DOAs) can only be determined within an unknown rotational angle in this array model. However, the phase ambiguity has no impact on the identification of the spatial signature. Two auto-calibration meth...

Using the centro-symmetry property of uniform linear array (ULA), we propose an algorithm that combines the weighted l2;1 minimization with the unitary transformation to improve the performance of DOA estimation. Exploiting the result of the unitary transformation, more credible weights can be obtained and the jointly sparse constraint can be further enhanced. Moreover, the unitary transformati...

In order to achieve fast and accurate passive location of the target radiation source, this paper puts forward a Virtual Time Reversal Method Based on Uniform Linear Array (ULA-VTR) algorithm. This framework employs time reversal focusing theory, which does not require physical transmission signals pre-estimation channel realize direction finding. The above principle is utilized perform source ...

Many algorithms have been proposed in recent years for source localization in near field. Some are based on subspace methods and some use evolutionary computing techniques. This article presents the performance of Differential Evolution (DE) algorithm for range and DOA estimation of near field narrow band sources, impinging on a uniform linear array (ULA) of passive sensors. Mean square error (...

In this paper, we propose a direction-of-arrival (DOA) estimation algorithm under unknown mutual coupling with a sparse linear array (SLA). We employ an SLA composed of two uniform linear arrays (ULA), and the element spacing of one of the subarrays is large enough to neglect the effect of the mutual coupling (MC). The fourth-order-cumulants (FOCs) of the received data from partial elements of ...

Recent developments in wireless communication systems in indoor environments require high data rates and high transmission qualities especially for multimedia applications in wireless local area network (WLAN) systems. The support of high data rate multiple-input multiple-output (MIMO) spatial-multiplexing communication in orthogonal frequencydivision multiplexing WLAN systems conforming to IEE...

In this paper, an effective target detection and localization method is proposed for a passive bistatic radar (PBR) system. The PBR system consists of a commercial FM radio station, which is a noncooperative illuminator of opportunity (IO), referred to as the transmitter antenna and multiple surveillance antennas that form an antenna array, e.g., uniform linear array (ULA). Unlike other literat...

This paper presents a system based on five-port demodulator which measures DoA (directions-of-arrival) of radio frequency signals received on an antenna array in the azimuth plane. The receiver operating at 2.4 GHz is composed of four five-port demodulators connected to a ULA (uniform linear array) of four patch antennas. The DoA is estimated by measuring the phase difference of signals picked ...

....................................................................................................................................................... A-2 Introduction ................................................................................................................................................. A-3 Estimation of the Direction of Arrival (DoA) and Direction of Departure (DoD) ...