Spectral efficiency of M-QAM in frequency reuse radio systems

Spectral efficiency of M-QAM in frequency reuse radio systems

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The spectral efficiency of M-QAM modulation has been investigated for frequency reuse radio systems under the propagation conditions of the land mobile radio environment. The results indicate that, under certain circumstances (of propagation and coverage requirements), increasing the number of levels can lead to an improvement in the spectral efficiency of interference limited systems, but that, as better coverage or service quality is sought, these spectral efficiency improvements diminish.


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