Pilot pollution interference cancellation in the third generation of wireless communications systems

The wireless mobile communications systems suffer significantly from the channel's inherent impairments where interference components are more pronounced.; The objective of the proposed research is to quantify the impact of the pilot pollution interference on the performance of the 3G systems and provides a generic framework for the pilot pollution interference detection and cancellation. The framework targets three main perspectives corresponding to the above-mentioned three PPI sources such as follow:; The first perception introduces a Base Station Assisted Search (BSAS) approach to minimize the number of the PPI occurrences at the handoff position. The proposed approach stems from constantly observing the environment surrounding the cellular cell and predicting whether the mobile user will pass through that cell or not. If pass through is detected, a dedicated traffic channel will be reserved exclusively for its use and a back off signal will be sent to the neighboring cells holding them from communicating with that mobile user. Thereby, there is a minor chance that the mobile user will receive another extra strong pilot signal. This leads to improve the handoff dropping probability as well as the new calls blocking probability. Simulation experiments are conducted and promising results are obtained.; The second perception proposes an Integrated Configuration Management System for the 3G systems. The proposed approach experiments a full spectrum of a real world 3G network-planning case study. Additionally, the proposed approach introduces a sensory approach to sense any coverage gaps due to the unexpected increase of the pilot pollution interference level and suggests a solution based on the usage of adaptive antenna arrays to alleviate the impact of the PPI existence. Extensive simulation experiments are conducted to verify the feasibility and effectiveness of the proposed approach.; The third perception demonstrates the power of using a novel Multi-Carrier Interferometry chip shaping approach to alleviate the impact of the pilot pollution interference. Consequently, the mobile's RAKE receiver will have the capability to perform frequency diversity rather than multi-path diversity. This will make efficient use of the received signal energy in the frequency domain and boost the performance of the system. Simulation studies have been carried out to verify the appropriateness of the proposed approach and promising results are obtained. (Abstract shortened by UMI.)...