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Optimizing Communication Systems: Techniques for Coverage Enhancement and Interference Reduction

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This detailed guide explores advanced operational techniques for optimizing communication systems, focusing on enhancing coverage, increasing traffic capacity, and minimizing interference. Key concepts include adjusting system parameters, utilizing leaky feeders, implementing cell splitting and small cells, and applying narrow beam concepts. The text also discusses methods for addressing coverage holes, using enhancers and passive reflectors, and employing various diversity techniques. By understanding and applying these principles, communication engineers can significantly improve system performance and reliability.

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Optimizing Communication Systems: Techniques for Coverage Enhancement and Interference Reduction

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Presentation Transcript

  1. OPERATIONALTECHNIQUES By Harpinder Kang Khattra

  2. Topics • Parameters • Coverage hole filler • Leaky feeders • Cell splitting and small cells • Narrow beam concept

  3. ADJUSTING THE PARAMETERSOF A SYSTEM • Increasing the Coverage for a Noise-Limited System • Reducing the Interference • Increasing the Traffic Capacity

  4. Increasing the Coverage for a Noise-Limited System • Increasing the Transmitted Power. • Increasing Cell-Site Antenna Height. • Using a High-Gain or a Directional Antenna at the Cell Site. • Lowering the Threshold Level of a Received Signal. • A Low-Noise Receiver • Diversity Receiver. • Selecting Cell-Site Locations. • Using Repeaters and Enhancers to Enlarge the Coverage Area or to Fill in Holes. • Engineering the Antenna Patterns

  5. Reducing the Interference • A good frequency-management chart. • An intelligent frequency assignment. • A proper frequency among a set assigned to a particular mobile unit. • Design of an antenna pattern on the basis of direction. • Tilting-antenna patterns. • Reducing the antenna height. • Reducing the transmitted power. • Choosing the cell-site location.

  6. Increasing the Traffic Capacity • Small Cell Size. • Increasing the Number of Radio Channels in Each Cell. • Enhanced Frequency Spectrum. • Queuing. • Dynamic Channel Assignment.

  7. COVERAGE-HOLE FILLER • Enhancers • Passive Reflector • Diversity • Co-phase Technique

  8. Enhancers

  9. The received signal at the mobile units and at the cell site with an enhancer placed in the middle can be expressed as

  10. Three points should be noted in the installation of an enhancer. • Ring oscillation might easily occur. • The distance between the enhancer and the serving cell site should be as small as possible • Geographic contour should be considered in enhancer installation.

  11. Passive Reflector • The approximate separation between the antenna and the reflector is If the transmitting and receiving antennas are linear elements, then22q

  12. Diversity • The diversity schemes can be classified as • polarization diversity • space diversity • frequency diversity • time diversity • angle diversity.

  13. Co-phase Technique (a) Feedforwardcombiner

  14. (b) feedback combiner.

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