In the context of Section 10.2.4, let is still valid if the DFT is performed to the sample block instead of the block {bn, n = 0, 1, … , N − 1} as used in Section 10.2.4, as long as Δ ≥ δ ≥ 0. The...

In the context of Section 10.2.4, let

is still valid if the DFT is performed to the sample block

instead of the block {b_n, n = 0, 1, … , N − 1} as used in Section 10.2.4, as long as Δ ≥ δ ≥ 0. The only difference is that the effective channel hk would contain a phase shift, which depends on k and δ. This means there is a tolerance in alignment between the transmitted and received signals.