Showing papers on "Inverse trigonometric functions published in 1977"
Patent•
20 Jul 1977TL;DR: In this article, the baseband signal is transformed with a tanh -1 transformation function, and the carrier signal is modulated with a quadrature sum of two exponential signals related to the inverse hyperbolic tangent signal.
Abstract: Arc-cosine phase modulation is achieved by transforming the baseband signal with a tanh -1 transformation function, by modulating a carrier signal with a quadrature sum of two exponential signals related to the inverse hyperbolic tangent signal, and by hard limiting and filtering the modulated signal.
46 citations
TL;DR: The relation between the best approximations of periodic functions by trigonometric polynomials and the moduli of continuity of their arbitrary derivatives in the metric of the space L 2 is studied in this paper.
Abstract: The relation between the best approximations of periodic functions by trigonometric polynomials and the moduli of continuity of their arbitrary derivatives in the metric of the space L2 is studied.
13 citations