Hi Marcus, >> Anyway, having a lot of bits on the A/D, solves the problem. I do not >> have the optimal gain for each time slot, but that is not a huge >> issue. I make only coarse adjustment of the gain, just to avoid >> clipping of the signal in any time slot. And of course this is >> performed in not used time slots. In semi-static scenarios, this works >> well. > Indeed! What are your bandwidths? The ADC of the N210 has nominally > 14bits, but of those, roughly 12 are effectively available, but > oversampling usually saves the day and gives you something close to the > full 16 bit of dynamic range the samples going to your PC have. On the > AD936x of the B2xx series, the ADC is less potent, but with appropriate > preselection filtering, the noise figure is probably better than that on > the (a bit dated) XCVR2450's LNA. I go with the largest bandwidth, i.e. sample rate possible 25MS/s, or in some cases 50 MS/s (sc8), since the ranging precision is proportional with the bandwidth. Since I use BPSK, and I use large PN sequences (1024 chips), usually, a few bits are enough. A matched filtering (correlation) is performed at the receiver, and therefore a few bits for sampling the signal are enough. Similar to the GPS, where the ADC has 2, maximum 3 bits. And yes, the noise figure in the b205 is slightly better. Best regards, Vladica