On Information Rates over a Binary-Input Filtered Gaussian Channel

We study communication systems over band-limited Additive White Gaussian Noise (AWGN) channels in which the transmitter output is constrained to be symmetric binary (bi-polar). In this work we improve original Ozarov-Wyner-Ziv (OWZ) lower bound on capacity by introducing new achievability schemes with two advantages studied OWZ scheme based peak-power pulse-amplitude modulation. Our achieve a moderately improved information rate and do so much less sign transitions of signal. The gap between known upper-bound spectral constrains bi-polar signals our achievable reduced 0.93 bits per Nyquist interval at high SNR.