Capacity of Underspread Noncoherent WSSUS Fading Channels under Peak Signal Constraints

TL;DR

This paper derives explicit capacity bounds for underspread noncoherent WSSUS Rayleigh fading channels under peak constraints, identifying optimal bandwidths and providing insights into channel capacity limits.

Contribution

It provides the first explicit capacity bounds for noncoherent WSSUS channels with peak constraints, linking capacity to the scattering function and peak-to-average power ratio.

Findings

Capacity bounds depend explicitly on the scattering function.

Optimal bandwidth for capacity maximization is identified.

Bounds enable understanding of capacity limits under peak constraints.

Abstract

We characterize the capacity of the general class of noncoherent underspread wide-sense stationary uncorrelated scattering (WSSUS) time-frequency-selective Rayleigh fading channels, under peak constraints in time and frequency and in time only. Capacity upper and lower bounds are found which are explicit in the channel's scattering function and allow to identify the capacity-maximizing bandwidth for a given scattering function and a given peak-to-average power ratio.