This chapter is dedicated to radio channel measurement and modelling techniques for beyond 4G networks, in particular: • new measurement techniques not only targeting radio channels, but also material properties in new frequency bands (Section 9.1), • improved physical models, cowering full-wave as well as ray-based methods, with a specific sub-section dealing with diffuse scattering (DS) and c...

In this paper, the problem of joint beamforming and power control is studied in the uplink of multiple-input multiple-output (MIMO) cognitive radio networks (CRNs). The objective is maximizing the minimum signal-to-interference-plus-noise ratio (SINR) of the secondary users (SUs). The CRN consists of a cognitive radio-base station (CR-BS) and a number of SUs. The proposed scheme uses genetic al...

We investigate the impact of fiber chromatic dispersion on the performance of an externally modulated millimeter-wave fiber-radio system incorporating a broadband radio direct-sequence code division multiple access Ž . DS-CDMA scheme. In particular, we investigate the effect of dispersion on DS-CDMA signals with regard to CDMA code rate, center frequency, and modulator chirp. We show that the s...

This paper addresses the interference and load imbalance problems in multi-radio infrastructure mesh networks where each mesh node is equipped with multiple radio interfaces and a subset of nodes serve as Internet gateways. To provide backbone support, it is necessary to reduce interference and balance load in Wireless Mesh Networks (WMNs). In this paper, we propose a new Load-Aware Routing Met...

We quantify the angular clustering of radio galaxies in the NVSS and FIRST surveys using the two-point correlation function and the moments of counts-incells – both important points of comparison with theory. These investigations consistently demonstrate that the slope of the correlation function for radio galaxies agrees with that for optically-selected galaxies, γ ≈ 1.8. We describe how to di...

An important aspect in the field of selforganisation in mobile Ad Hoc networks is an efficient crosslinking of all nodes in a high-dynamic network topology. This should be durable against disturbances and partial losses and distribute the net load on all net elements as evenly as possible. Past research approaches limit their solutions to the usage of a homogeneous topology on basis of a unique...

This Paper describes a dynamic classmark scheme based on finite number of stages during a radio connection procedure for reconfigurable terminals in future multiple radio access technology environments. Based on the user profile, terminal profile and service profile that the user applies; features are clustered into different sets called classmarks. The classmarks are designed in a stage-based ...

We report a case of a 40-year-old female with cirrhosis, hepatocellular carcinoma, and upper gastrointestinal bleeding who developed multiple pulmonary emboli after endoscopic injection sclerotherapy for gastric variceal bleeding. The patient did not have any respiratory symptoms after the sclerotherapy. A chest radiograph obtained one day after the procedure for the evaluation of fever showed ...

This paper addresses real-time multiple-input-multiple-output (MIMO) radio channel sounding. To avoid expensive transmitter-receiver chains antenna multiplexing is well suited for that application. However, the sequential measurement principle entails different time lags between the antenna channels. We show how the observed impulse responses can be aligned using classical interpolation methods...

The World Radio Conference in 2007 identified additional spectrum for IMT-2000 and IMT-Advanced systems. That’s why also 3GPP has started a feasibility study for LTE-Advanced techniques to continuously evolve LTE technology. LTE-Advanced is expected to enable download peak rates over 1Gbps at 100MHz bandwidth and in the upload peak rates over 0.5Gbps. Novel techniques on radio interface are goi...