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  2. Diversity scheme - Wikipedia

    en.wikipedia.org/wiki/Diversity_scheme

    Frequency diversity: The signal is transmitted using several frequency channels or spread over a wide spectrum that is affected by frequency-selective fading. Later examples include: Later examples include:

  3. Fading - Wikipedia

    en.wikipedia.org/wiki/Fading

    In flat fading, the coherence bandwidth of the channel is larger than the bandwidth of the signal. Therefore, all frequency components of the signal will experience the same magnitude of fading. In frequency-selective fading, the coherence bandwidth of the channel is smaller than the bandwidth of the signal. Different frequency components of ...

  4. Transmit diversity - Wikipedia

    en.wikipedia.org/wiki/Transmit_diversity

    Transmit diversity is the use of multiple transmit antennas to achieve reliability in radio communication. [1] It involves using signals that originate from two or more independent sources that have been modulated with identical information-bearing signals and that may vary in their transmission characteristics at any given instant.

  5. Frequency selective fading - Wikipedia

    en.wikipedia.org/?title=Frequency_selective...

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  6. Orthogonal frequency-division multiplexing - Wikipedia

    en.wikipedia.org/wiki/Orthogonal_frequency...

    Frequency (subcarrier) interleaving increases resistance to frequency-selective channel conditions such as fading. For example, when a part of the channel bandwidth fades, frequency interleaving ensures that the bit errors that would result from those subcarriers in the faded part of the bandwidth are spread out in the bit-stream rather than ...

  7. Fading puppy syndrome - Wikipedia

    en.wikipedia.org/wiki/Fading_puppy_syndrome

    Fading puppy syndrome (or fading puppy complex) is when a puppy dies within the first few weeks of life without a clear cause of death or clinical signs, that is to say, they fail to thrive. [1] Death usually occurs within the first five days of life, [ 2 ] but can happen up to ten weeks of age. [ 3 ]

  8. Calming signals - Wikipedia

    en.wikipedia.org/wiki/Calming_signals

    A dog displaying the lip/nose licking behavior. Calming signals is a term conceived by Norwegian dog trainer and canine ethologist, Turid Rugaas, to describe the patterns of behavior used by dogs interacting with each other in environments that cause heightened stress and when conveying their desires or intentions.

  9. Frequency selective surface - Wikipedia

    en.wikipedia.org/wiki/Frequency_selective_surface

    A frequency-selective surface (FSS) is a thin, repetitive surface (such as the screen on a microwave oven) designed to reflect, transmit or absorb electromagnetic ...