Fading mitigation through diversity combining

Fading mitigation through diversity combining

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Diversity combining is one of the most effective fading mitigation techniques. The basic design principle of diversity technique influences the development of several advanced wireless transmission technology. In this chapter, we study the design and analysis of fundamental diversity combining schemes. After discussing the basic implementation strategies, we investigate several conventional diversity combining schemes, including selection combining, maximum ratio combining, and thresholding combining. Special emphasis is put on the tradeoff analysis of performance versus complexity among different combining schemes. Finally, we presents the transmit diversity solutions for the multiple antennas at the transmitter scenario.

Chapter Contents:

  • 5.1 Basics of diversity combining
  • 5.1.1 Implementation strategies
  • 5.1.2 Antenna reception diversity
  • 5.1.3 Framework for performance analysis
  • 5.2 Selection combining
  • 5.3 Maximum ratio combining
  • 5.3.1 Optimal linear combining
  • 5.3.2 Performance analysis
  • 5.3.3 Equal gain combining
  • 5.4 Threshold combining and its variants
  • 5.4.1 Dual-branch switch and stay combining
  • 5.4.2 Multibranch switch and examine combining
  • 5.4.3 Threshold combining with post-examining selection
  • 5.5 Transmit diversity
  • 5.5.1 Channel knowledge available at transmitter
  • 5.5.2 Channel knowledge unavailable at transmitter
  • 5.6 Further readings
  • Problems
  • Bibliography

Inspec keywords: transmitting antennas; diversity reception; fading channels

Other keywords: wireless transmission technology; fading mitigation techniques; selection combining; thresholding combining; maximum ratio combining; transmit diversity solutions; diversity combining

Subjects: Radio links and equipment

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