Distributed aperture radars represent an interesting solution for target detection in strong interference environments. Distributed apertures provide improved angular resolution or are able to view a target from multiple look-angles, thereby exploiting scintillation. However, due to the large distances between array elements, both target and interfering sources are in the near field of the ante...

This paper proposes a new spatiotemporal equalization method, which utilizes an adaptive antenna array and a decision feedback equalizer (DFE) simultaneously. For e ective spatiotemporal equalization, how to assign the role to spatial equalization part and temporal equalization part is really important. One of the answers which we have given is `incoming signals with larger time delays should b...

In this paper we present the practical hardware implementation of a systolic array for performing recursive leastsquares minimisation via orthogonal matrix triangularisation. This is an extremely demanding task for high speed, real-time operation such as required in many modern adaptive antenna, radar, and sonar systems. Since the underlying Givens rotations can be e ciently computed by the COR...

Abstract The uplink performance of a direct-sequence code division multiple access (DS-CDMA) packet cellular system is limited by multi-access interference (MAI) from the other users. On one hand, adaptive antenna array (AAA) is a promising technique to increase the link capacity by suppressing the MAI of mobile radio communications systems. On the other hand, transmit power control (TPC) is an...

Spatial processing with adaptive antenna array has shown real promise for substantial capacity enhancement in wireless communications. We propose a novel beamforming technique based on the minimum bit error rate (MBER) criterion. It is demonstrated that the MBER approach utilizes the system resource, the antenna elements, more intelligently than the standard minimum mean square error (MMSE) app...

In this paper, an optimal approach to design wideband tapped-delay line (TDL) array antenna is proposed. This approach lets us control the array angular and frequency response over a wide frequency band. To this end, some design restrictions are defined and a multi-objective optimization problem is constructed by putting the individual restrictions together. The optimal weights of the TDL proce...

Phased antenna array design is one of the most important electromagnetic optimization problems. This research combined the Taguchi method and artificial intelligence methods, used them as the prediction tool in designing parameters for the communication system, and then constructed a set of the optimal parameter analysis flow and steps. In this paper, we present an application of artificial neu...

In this lecture we present the principles of adaptive beamforming, the problem of estimating the adaptive weights and several associated practical problems, like preserving low sidelobe patterns, using subarrays and GSLC configurations. We explain the detection problem with adaptive arrays and the methods for angle estimation. Finally the methods for resolution enhancement (super-resolution met...

The main aim of this paper is to simulate different types of Adaptive Algorithms for Spatial Beam forming, which is achieved by combining elements of a phased array in such a way that signals at particular angles experience constructive interference while others experience destructive interference. Here, simulations are done on different types of Adaptive Algorithms in MATLAB and Simulink to de...