Dynamic wideband channel simulator for WSNs in harsh industrial environments. Parameters u(t) and y(t) are the input and output signals, respectively. Parameters A(t),τ, and ϕ are the amplitude, delay, and phase of each multipath component, respectively. Parameter λ is the wavelength, and d is the path-length of each multipath component. Parameter n(t) is the AWGN plus impulse noise, and J(t) is the interference from multiple narrowband signals.