... independent and identically distributed (i.i.d.) Gaussian obser vation noise with zero mean and variance σ2s, an d θ is bounded within a dynamic range [−V, +V ].2.2 Quantization, coding, and modulationWe ... i.i.d. and subjected to complex Gaussi an distribution with zero mean and unit variance, nc,iis a vector of thermal noise at the receiver subjecting tocomplex Gaussian distribution with zero mean ... p(yi|θ) and its partial derivatives. After takingthe first- and second-order partial derivatives of p(yi|θ) and comparing them with (54), (56) and (57), thesuboptimal estimator can be rewr...