A method for selecting one of a plurality of antennas in a reception antenna diversity - and - antenna diversity receiver system.

摘要

In an antenna diversity - receiving system with several antennas (a1, a2, a3, a4), in the case of unfavorable reception conditions, such as, for example, in the case of very low and very high electrical field strengths, as well as in the case of adjacent channel detection adjacent channel interferences, continuously from an antenna is switched over to a different antenna. In order to unnecessary to switch to a different antenna, according to a first method according to the invention, which in the case of reception disturbances at the output of an accident detector (dm) pulses occurring in the form of an integrator (i) to integrate and a switchover to a different antenna only then can be made, if the integral of the integrated pulses exceeds a predefinable threshold value. A second method according to the invention to avoid unnecessary switching processes provides that, in the case of field strengths below a lower threshold value and above an upper threshold value, a logic circuit (mp), for example a microprocessor, microcontroller or microcomputer, the to the radio receiver (tu) of the antenna diversity reception system - is to be an antenna according to different criteria than the evaluation circuit (aw) selects the antenna diversity - receiver system. A third method according to the invention to avoid unnecessary switching processes provides that the logic circuit (mp) the number of counts per unit of switching processes which occur and the selection of the antenna according to different criteria than the selection circuit (aw), if the number of switching operations. ..