Input signal M

M₁

M₂

M₃

...

M_k

Noise factor N

N₁

y₁₁

y₁₂

y₁₃

...

y_1k

N₂

y₂₁

y₂₂

y₂₃

...

y_2k

...

...

...

...

...

...

N_n

y_n1

y_n2

y_n3

...

y_nk