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Information rate in a continuous channel for regular-simplex codes

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1 Author(s)

Mequally probable symbols may be encoded as continuous waveforms whose sample values are the coordinates of the vertices of a regular simplex inNdimensions. These vertices or code points, therefore, are equally spaced, and the resulting waveforms are adapted particularly to low signal-to-noise communication systems. An upper bound for the information rate in an additive Gaussian noise channel, based on the use of regular-simplex coded waveforms, has been calculated. The results indicate that for signal-to-noise energy ratios less than approximately unity and for error probabilities ranging from10^{-2}tol0^{-8}, this rate is a sizable percentage of the ideal rate which has been derived by Shannon and Tuller.

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Information Theory, IRE Transactions on  (Volume:6 ,  Issue: 5 )