Howtosignalprocessing
What is doubly selective channels?
focus of this paper is on learning doubly-selective channels, which are characterized by the fact that the delay spread and Doppler spread of the channel are large relative to the inverse of the signaling bandwidth and duration, respectively, i.e., Wτmax ≥ 1 and Tνmax ≥ 1.
What is frequency selective channel?
Frequency selective channels are characterized by time varying nature of the channel. For simulating a frequency selective channel, it is mandatory to have N > 1. In contrast, if N = 1, it simulates a zero-mean fading channel where all the multipath signals arrive at the receiver at the same time.
