An Upper Bound for the Capacity of Amplitude-Constrained Scalar AWGN Channel

Abstract

This paper slightly improves the upper bound in Thangaraj et al. for the capacity of the amplitude-constrained scalar AWGN channel. This improvement makes the upper bound within 0.002 bits of the capacity for $\frac{E_b}{N_0}\le 2.5$ dB.

arXiv comment4 pages, 2 figures, Accepted for publication in IEEE Comm. Letters