Traditional joint power control and beamforming achieve the targeted signal-to-interference-noise ratio (SINR) at the receivers by assuming the knowledge of the measurements of channel parameters and SINR. Blind beamforming is an effective technique for beamforming and channel estimation without the need of training sequences, thus not consuming extra bandwidth. In this paper, we propose a nove...

This paper describes a nonlinear filter for ground target tracking. Hospitability for maneuver derived from terrain, road and vehicle dynamics constraints is incorporated directly into the filter's motion model. The conditional probability density for the target state is maintained and updated with sensor measurements as soon as they become available. The conditional density is time updated bet...

In this thesis we analyze scheduling in wireless networks under the physical model. In particular, we ask the following question. Given n communication requests as pairs of nodes from a metric space, how fast can we schedule all of them? We have to assign a schedule slot and a transmission power to each request and need to ensure that during each schedule step the interference at the addressed ...

In this letter, we investigate the outage probability of a dual-hop N -best decode-and-forward multicast relay network in which the relay and destination undergo multiple co-channel interferences (CCIs). It is shown that the signal-to-interferenceplus-noise ratio (SINR) of the link from source to destination and that from relays to destination are correlated due to the common CCI at the destina...

We study auction mechanisms for sharing spectrum among a group of users, subject to a constraint on the interference temperature at a measurement point. The users access the channel using spread spectrum signaling and so interfere with each other. Each user receives a utility that is a function of the received signal-to-interference plus noise ratio. We propose two auction mechanisms for alloca...

This paper addresses the problem of adaptive quality-of-service (QoS) for mobile multimedia services under a power controlled wireless network using smart antennas. Given the nature of multimedia, we chose the signal-to-interference and noise ratio (SINR) of each user’s channel as the QoS index. We direct our attention toward two problems. The first is to increase the SINR levels for multimedia...

Research in wireless data transmission and mobile communication is often based on simulations. Using such simulations one can compare the performance and verify the correct operation of developed algorithms and transmission schemes. Nevertheless, real-world performance measurements of wireless communiations techniques might give further insights and may help at investigating transmission scenar...

Diagonal loading imparts Robustness to the adaptive beamformer against signal mismatch due to low sample support. It helps to achieve desired sidelobe level and to improve Signal to Interference plus Noise Ratio (SINR). In this paper, variants of Minimum Variance Distortionless Response-Sample Matrix Inversion (MVDR-SMI) beamformer with diagonal loading are analyzed. A novel hybrid algorithm, M...

Variable environments in ad hoc networks require a joint control of physical (PHY) and medium access control (MAC) layers resources in order to optimize performance. In this paper, we propose a framework to perform such cross-layer control and optimization. The PHY layer and cross-layer engine estimate and predict the channel variations to select the users that will meet the signal-to-interfere...

In this paper, different beamforming techniques are employed in the wide-band code-division multiple-access base station, and their uplink and downlink signal-to-(interference plus noise) ratio (SINR) performances are compared. It is found that the direction of arrival (DOA) method and the complex conjugate method almost have the same uplink SINR performance, but the complex conjugate method wi...