Beamforming problem is studied in wireless networks where both transmitters and receivers have linear adaptive antenna arrays. Algorithms are proposed that find antenna array weight vectors at both transmitters and receivers as well as the transmitter powers with one of the following two objectives: 1) to maximize the minimum signal-to-interference-and-noise ratio (SINR) over all receivers and ...

This paper presents a beamforming technique for the reception of frequency hopping (FH) modulated signals, which takes advantage of their inherent frequency diversity. This technique, based on a code reference beamformer, requires neither temporal nor spatial a priori reference and allows continuous self-calibration of the array. The proposed framework is composed of two di!erent stages. The "r...

One of the most promising techniques for increasing capacity in CDMA system is through the use of antenna array. There are a lot of different ways to calculate capacity of CDMA system. Some of them are quite simple and has an explicit form. The paper introduces to the capacity and coverage in asynchronous Code Division Multiple Access CDMA 2000 based system. Different channel scenario is applie...

Choosing an appropriate interference model is crucial for link scheduling problems in sensor networks. While graph-based interference models allow for distributed and purely local coloring approaches which lead to many interesting results, a more realistic and widely agreed on model such as the signal-to-noise-plus-interference ratio (SINR) inherently makes scheduling radio transmission a non-l...

The signal to interference plus noise ratio (SINR) performance of SAR imagery knowledge-aided (KA) airborne moving target indicator (AMTI) radar subjected to severely taxing environmental disturbances is investigated for radar-blind and radar-seeing highly compressed SAR imagery. Radar-seeing schemes are found to greatly outperform radar-blind techniques.

Volume I first provides a compact survey on classical stochastic geometry models, with a main focus on spatial shot-noise processes, coverage processes and random tessellations. It then focuses on signal to interference noise ratio (SINR) stochastic geometry, which is the basis for the modeling of wireless network protocols and architectures considered in Volume II. It also contains an appendix...

Clearly, setting the parameter λ to 1 reduces (2) to (1). Here, we allow λ to be an arbitrary positive number for ease of further discussions. We note that the power minimization in (2) can be efficiently solved with a single SDP [2]. We next establish a close relation between the max-min SINR problem (5) in [1] and the power minimization problem in (2). We first show that (2) can be solved via...

We study the multi-broadcast problem in multi-hop wireless networks under the SINR model deployed in the 2D Euclidean plane. In multi-broadcast, there are k initial rumours, potentially belonging to different nodes, that must be forwarded to all n nodes of the network. We present deterministic algorithms for multi-broadcast for different settings that reflect the different types of knowledge ab...

Our work is to study the Minimum Latency Broadcast Scheduling problem in the geometric SINR model with power control. With power control, sensor nodes have the ability to adjust transmitting power. While existing works studied the problem assuming a uniform power assignment or allowing unlimited power levels, we investigate the problem with a more realistic power assignment model where the maxi...

We consider LTE and WiFi networks in order to model both PHY and MAC layers. Our physical layer abstraction consists a mapping between user’s SINR and their corresponding rate. On the other hand, we will propose a proper queue model to represent the schedulers of each radio access technique (RAT), at the MAC layer.