Patent ID: 8831527

Claim:
A method for measuring antenna diversity gain of digital systems by measuring improvement of a receiver system sensitivity by measuring bit error rate (BER), wherein the method comprises the following steps: measuring a first input power P RX ( 1 ) of a receiver system ( 4 ) and a corresponding first bit error rate BER ( 1 ) for a respective propagation scenario with one antenna ( 3 ); measuring a second bit error rate BER( 2 ) at the receiver system ( 4 ) at a second system input power P RX ( 2 ) equal to the first input power P RX ( 1 ) with a plurality of antennas ( 5 , 6 ); reducing the first input power at the receiver system ( 4 ) to a third input power P RX ( 3 ), at which a corresponding third bit error rate BER( 3 ) is about equal to the first bit error rate BER( 1 ) according to the step of measuring the first input power; determining an expected input power P RX * to be expected at the third bit error rate BER( 3 ) from the determined first and second input powers P RX ( 1 ), P RX ( 2 ) and the first, second and third bit error rates BER( 1 ), BER( 2 ) and BER( 3 ) by interpolation/extrapolation; and determining the antenna diversity gain (DG) by calculating a difference between the first input power P RX ( 1 ) and the expected input power P RX *.