The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the increase of signal bandwidth demands in these applications, it is a technical challenge to achieve the required high Nyquist sampling rate. In this paper, a new sub-Nyquist sampling array architecture for the multi-band signal carrier frequency and DOA estimation based on a uniform linear array is proposed, which consists of a two-stage estimate algorithm and the corresponding parameter pairing...
This paper presents a temporal method for direction of arrival (DOA) estimation for wideband sources by using an antenna array. Existing DOA estimation algorithms treat the problem in frequency domain by decomposing the wide spectrum of these signals in several narrowband signals, and use a narrowband DOA estimation methods to solve the problem. These methods suffer from high computational complexity...
A new DOA (direction of arrival) estimator based on MIMO sonar system is proposed to estimate the DOA of long distance targets. First, wideband orthogonal signals are sent out by transmitting sensors and the output of receiving sensors is decomposed into several narrow frequency bands using FFT. The covariance matrix of receiving signals can be expressed as the superposition of the covariance matrices...
This paper proposes an efficient direction-of-arrival (DOA) estimation algorithm for wideband signals from data collected using two sensors. Like the traditional wideband methods, this algorithm first decomposes wideband sources into narrowband bins. At each frequency bin, the cross-correlation between sensors is estimated to construct a Toeplitz matrix, which contains all angle information. Thus...
In conventional direction of arrival (DOA) estimation techniques, the inter-sensor spacing of an array is designed according to the minimal wavelength of an applied signal to avoid spatial ambiguity. This constraint greatly restricts the resolution of array or the performance of DOA estimation for a wideband signal. In this work, a new concept of wideband DOA estimation is described. Compared with...
The source line fitting method (SLFM) is effective for estimating DOAs of wideband signals, when the inter-element spacing of the array exceeds half the wavelength. It exploits one reference to construct source lines (SL), and estimates DOAs by measuring the angles of SLs. In this paper, we improve SLFM by using two reference signals, which is called two references SLFM (TRSLFM). The incremental reference...
This paper introduces a new direction of arrival(DOA) estimation algorithm for wideband sources called source line fitting method(SLFM). Unlike other coherent wideband methods, such as CSSM, TOPS and WAVES, the new method does not require to decompose wideband signals into multiple frequency components. Instead, it uses time delay information directly to construct the source lines, each of which corresponds...
This paper deals with the computation of the Cramer-Rao lower bound (CRB) for direction of arrival (DOA) estimation of ultra wideband-orthogonal frequency division multiplexing (UWB-OFDM) signals detected by antenna arrays for millimetre-wave applications. The CRB on DOA estimation of UWB-OFDM sources is evaluated by extending the mathematical model of DOA estimation of narrow band signals to wideband...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.