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MUSIC type algorithm for joint estimation of parameters in asynchronous MC CDMA systems with antenna array at the transmit and single antenna at the receive side is presented in this paper. The proposed algorithm enables joint of direction of departure (DoD), time delay, and frequency shift estimation of multi-user MC CDMA signals. The algorithm is suitable for use in fading channels and can be used...
Estimation of Direction of Arrival (DOA) signal is one important function of adoptive antenna. The fuzzy angle in correlative signal environment of DOA estimation could seriously affect the estimation precision. Based on 1-D spatial smoothing theory the paper analyzes the algorithm for 2-D angle estimation in correlative source environment of hexagonal array and simulations were carried out. A method...
A 2D DOA estimation algorithm in the presence of unknown mutual coupling for Y-shaped array based on MUSIC algorithm is presented and performance comparison among ULA, L-shaped array and Y-shaped array is analyzed. This algorithm can simultaneously estimate DOA of signals and coupling coefficients of antenna array without any calibration sources or iterative operations. It not only calibrates mutual...
This paper presents a Kalman-filter-based method, to track the direction-of-arrival (DOA) of a moving target using antenna array in mobile communications. There are two major new features about the proposed scheme. Firstly, traditional Kalman filter needs measurement transformed. However, it is difficult and costly to be obtained. And our method could work without this message. Secondly, the traditional...
Different beamforming algorithms like side-lobe cancellors, linearly constrained minimum variance (LCMV), least mean squares (LMS), recursive LMS, and direction of arrival (DOA) exist in literature. Among the direction of arrival (DOA) algorithms, MUSIC and ESPRIT play the most important role. These two algorithms were implemented and their performances were compared. The algorithms were simulated...
This paper presents a method for high-resolution estimation of the angles of arrival of multiple narrowband plane waves. The technique bases on interpolation and virtual array from an array of sensors. The algorithm principle is presented, and followed by simulation examples. The basic idea of the proposed approach is to increase the number of sensors to virtually reducing the sensor spacing of the...
In this paper we introduce a mathematical modelling of signal which is considered to be received from the near-field of an arbitrary antenna array. The signal model of our formulation is almost similar to beamspace processing but not exactly same. This modeling is also different from element space processing because the range of signal source is also incorporated to account the near-field curvature...
In indoor communications, the multipath propagation is fundamental. Generally, several replicas of the signal impinge in the receiving antenna. When there is line of sight, the received energy will be centered in a single wave. In the opposite case, the energy received in the array, is divided in several directions of the multipath, the signal simulates to have arrived from several sources of signal...
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