Method and device for measuring the antenna diversity gain in digital radio transmission systems

摘要

The invention relates to a method and a device for measuring the antenna diversity gain in digital radio transmission systems, wherein the sensitivity of a receiver system is designed by using a plurality of antennas, wherein the signals thereof determine a diversity gain (DG) by means of the bit error rate (BER)-increase of the signals. The invention is characterized in that the method and the device for measuring the diversity-gain (DG) in digital radio transmission systems form an optimization of radio net planning by means of targeted use of diversity, wherein a decrease of the number of used base stations and an increase of the transmission- and receiving quality is achieved.

主权项

1. 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 PRX(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 PRX(2) equal to the first input power PRX(1) with a plurality of antennas (5, 6); reducing the first input power at the receiver system (4) to a third input power PRX(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 PRX* to be expected at the third bit error rate BER(3) from the determined first and second input powers PRX(1), PRX(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 PRX(1) and the expected input power PRX*.