Less spectral efficiency because the first symbol is only used
only for reference.
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0.17 bit/s per Hertz per sector
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Greater efficiency, and the ability to remove signal variations
and noise are just a few of the advantages of RF modules.
Disadvantages include the need for filters to limit bandwidth and
lower spectral efficiency.
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In GSM generally GMSK which is a derivative of MSK is beeing
used because of its spectral efficiency and more noise
resistant.
Regards
Sumeer Mehaboob
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what is spectral evidence
Spectrum (spectral) refers to different frequencies of light
associated with a substance.