Supposing we have multiple samples of a scaled signal $x$ given by $y_i=a_ix+n_i$ where $n_i$ is AWGN how does the bit accuracy of estimation of $x$ improve with averaging of samples $y_i$ (number of bits per sample)? Assume we know $a_i$.
Say I want $x$ with an error affecting only $m$ bits does $\log m$ samples of $y_i$ suffice?