Achievable rates for the noncoherent frequency selective fading channel

This paper investigates achievable rates for the time varying frequency selective fading channel in a single-input and single-output (SISO) system. The channel state information (CSI) is not known a priori at either the transmitter or the receiver. The paper begins by presenting a general simulation based technique to compute lower and upper bounds on the achievable rates. The paper also derives an analytical lower bound. Finally, the paper computes the loss associated with pilot based schemes by comparing their achievable rates with the bounds.