FACTOR-OF-TWO BOUND FOR CAPACITY IN GAUSSIAN CHANNEL WITH FEEDBACK AND COVER'S CONJECTURE

We consider the upper bounds of the finite block length capacity Cn,F B(P) of the discrete time Gaussian channel with feedback. We prove the refinements of relations Cn(P) ≤ Cn,F B(P) ≤ Cn(P )+ 1 2 and Cn(P) ≤ Cn,F B(P) ≤ 2Cn(P), which are given by Cover and Pombra. And we prove the relation C2(P) ≤ C2,F B(P) 更多