A Generalized Array Manifold Model for Local Scattering in Wireless Communications

Abstract

In wireless communication scenarios, local scatterers in the vicinity of the mobile sources cause angular spreading. As a result, the spatial signatures will not belong to the conventional array manifold parameterized by direction of arrival (DOA) alone. In this paper, a parameterized model for spatial signatures applicable in scenarios with local scattering is presented. Several algorithms that exploit this model are proposed, and the performance of signal waveform estimators using the model is investigated via simulations. It is demonstrated that considerable gain may result as compared with using the conventional plane wave model. 1. INTRODUCTION The use of antenna arrays as a tool for improving coverage, reducing interference, and increasing capacity in wireless communications systems has recently attracted significant interest [6]. For the uplink (remote to base) portion of the system, signals can be separated at the array based on knowledge of their spatial or temporal "signatu..