Subarray design for adaptive interference cancellation

Abstract

A method for designing near optimal, tapered subarrays for adaptive interference cancellation is proposed. The design method simultaneously produces a complete ordered set of fixed beam definitions, or nonadaptive weight vectors. The designer may choose to implement the first of these if he or she wishes to have exactly adaptive weights. In other words, the digital-adaptive processing is done in beam space, such that the beams are designed using the proposed method. To facilitate a RF implementation of the nonadaptive beamformer, each auxiliary beam uses only a designer-specified number of the elements in the aperture, thereby reducing the number of waveguide connections required. This design approach is fundamentally different from conventional subarray design approaches in that the new designs utilize cost functions related to interference cancellation.

A Design Method of Single Carrier Spatio-Temporal MIMO Systems with Reduced Computational Cost

“…This manipulation coincides with that of subarray method [7], hence the design method described here could be interpreted as an extension of subarray processing to the spatio-temporal version .…”

Null steering in irregularly spaced sparse antenna arrays using aperture distributed subarrays and hybrid optimiser

“…For large planar antenna arrays, optimisation techniques require significant amount of time to reach an acceptable solution. This delay can be reduced by dividing the array into relatively small subarrays and their use for pattern nulling is reported in literature [16–23].…”