Table 2 Receiver strategies discussed in this paper

Linear

Linear combiner [14, 94,95,96]

Noise distribution approximation

Gaussian mixture [97], \(\epsilon\)-contaminated [98], Generalized Gaussian [51], mixture of Laplacian and Gaussian [50], Cauchy [17], Myriad [20, 92, 99], NIG[23]

LLR inspired

Soft limiter and Hole puncher [66, 73, 92, 100, 101], p-norm [105], LLR approximation [19], approximation of \(f'_{I+N}(.)/f_{I+N}(.)\) [102,103,104]