The capacity region of Gaussian cognitive radio channels to within 1.81 bits

FREE-DOWNLOAD S Rini, D Tuninetti… – Information Theory Workshop …, 2010 –
Abstract—We make use of the deterministic high-SNR approximation of the Gaussian cognitive
radio channel to gain insights in deriving inner and outer bounds for any SNR. We show that
the derived bounds are at most 1.81 bits apart for any SNR.