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This paper investigates eigenbeamforming with a uniform circular array at the BTS. The geometricalbased channel model with hyperbolically-distributed scatterers (GBHDS) is used to simulate the multipath environment. Simulation results showed that using a UCA significantly improves the CDMA system's performance, outperforming the system using a ULA.

Deployment of cellular system with frequency reuse of one is critical to support increased data traffic and high data rate applications in 4G and beyond radio interface technologies. Such deployment leads to substantial increase in Inter-Cell Interference (ICI). Therefore, this paper investigates and evaluates the capacity performance of mobile cellular system with a frequency reuse of one and three-sector per Base Station (BS). The communication channel between the BSs and user equipment links is modeled using ITU-R channel model. The study considers different carrier frequencies and different cell ranges. The system performance is assessed in terms of Signal to Noise Ratio (SNR), Signal to Interference plus Noise Ratio (SINR) and ergodic capacity. The SNR and ergodic capacity improve significantly as the cell range and carrier frequency decreases for ICI free scenario. However, for ICI scenario, there are slight variation in the performance when changing the cell range and the carrier frequency. The study recommends a cell size of 800 m.

The study sought to identify the reality of solid waste management and to identify the extent of solid waste management application strategies by the people or service units of the Directorate of Mosul Municipality, the study identified the problem by raising the following questions: 1. To what extent and clarity of the concept and application of knowledge and strategies for environmental management of solid waste? 2. What are the obstacles to the application of environmental management strategies for municipal solid waste in Mosul? In order to reach the objectives of the study, a sample was selected from the administrative leadership (Director of the municipality and the deputy and division directors and heads of service units) to be room for the field of study. The study used a form of questionnaire to collect data, as well as personal interviews, relied on a set of statistical tools such as frequencies, percentages, averages and standard deviations. The study found the most important conclusions of the following: 1. Lack of definition of the responsibility for managing solid waste in the municipality of Mosul. 2. No preliminary treatment is enough for solid waste. 3. Lack of administrative elements to the training. The study research included a set of proposals that can be relied upon to overcome the problems that prevent the safe application of environmental management of solid waste in the municipality of Mosul, as well as proposing a number of future studies as it deems appropriate researchers in the field of the present study.