Performance analysis of non-orthogonal MT-FSK systems with degraded branch statistics

The authors analyze the performance degradation of a MT-FSK (multiple-tone frequency-shift keying) scheme based on Steiner designs on a Rayleigh fading channel with degraded branches. Two cases are shown, a fading channel with correlated branches and a fading channel with unequal average signal-to-noise ratio per branch. These two impairments are shown to decrease the effective diversity; however, improvements are still observed over conventional MFSK.<
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