Assignment:
A discrete time rp x(nTs) with iid symbols and Laplacian distribution
Px(a) = 1/2V0e-|a|/V0
is quantized with an uniform quantizer with L levels and step size Δ. Let xq(nTs) be the quantizer output rp.
a) Find alphabet, entropy and information rate of xq(nTs) in the case 1/Ts = 8kHz, L = 6 and = V0/2.
b) Find an optimal binary prefix code for xq(nTs), with the above values for L and and evaluate its efficiency.
c) Show that when L is even and Δ = V0 ln 2, there exists a prefix code with unit efficiency for xq(nTs).