In this paper, we study the problem of wideband direction arrival (DoA) estimation with sparse linear arrays (SLAs), where a number uncorrelated signals impinge on an SLA and data is collected from multiple frequency bins. To boost performance perform underdetermined DoA estimation, difference co-array response matrices for all bins are constructed first. Then, to merge different bins, resort J...

In this paper, we study the problem of joint wideband spectrum sensing and direction-of-arrival (DoA) estimation in a sub-Nyquist sampling framework. Specifically, considering a scenario where a few uncorrelated narrowband signals spread over a wide (say, several GHz) frequency band, our objective is to estimate the carrier frequencies and the DoAs associated with the narrowband sources, as wel...

The outage probability of reverse link multicarrier (MC) code-division multiple access (CDMA) systems with beamforming in the presence of carrier frequency offset (CFO) is studied. A conventional uniform linear array (ULA) beamformer is utilized. An independent Nakagami fading channel is assumed for each subcarrier of all users. The outage probability is first investigated under a scenario wher...

This paper presents measurement results at 2.3 GHz for multiple-input multiple-output (MIMO) systems applying multiple polarized antenna arrays and single polarized uniform linear arrays (ULAs). The measurements were taken indoor in two different buildings, outdoor between a base station on the rooftop and a mobile station in a car, as well as between two mobile stations in two cars (C2C). Meas...

The Multiple Signal Classification (MUSIC) algorithm is a powerful technique for determining the Direction of Arrival (DOA) of signals impinging on an antenna array.The algorithm is serial based, mathematically intensive, and requires substantial computing power to realize in real-time.Recently, multi-core processors are becoming more prevalent and affordable.The challenge of adapting existing ...

Reconfigurable intelligent surface (RIS) can improve the communications between a source and destination. Recently, continuous aperture RIS is proved to have better communication performance than discrete has received much attention. However, conventional designed convert incoming planar waves into outgoing waves, which not optimal reflecting scheme when receiver array located in near field of ...

Free standing linear arrays (FSLA) are analyzed and optimized to increase MIMO capacity. A MIMO channel model based on electric fields is used. The effects of mutual interactions among the array elements are included into the channel matrix using Method of Moments (MoM) based full-wave solvers. A tool to design an antenna array of superior MIMO capacity for any specified volume is developed. Pa...