Arrangement for suppressing spurious signals occurring in the reception signal of a receiver of a high-frequency message transmission system

摘要

In an arrangement for suppressing spurious signals occurring in a reception signal in a receiver of a high-frequency message transmission system, these spurious signals resulting from at least one neighboring channel that neighbors the useful signal channel, the reception signal is distributed onto at least two branches. One of the branches has a summing element as well as a circuit for generating a signal with a frequency, phase and amplitude corresponding to the useful signal. The other branch also has a summing element as well as a circuit for generating a signal having a frequency, phase and amplitude corresponding to the spurious signal. The signals of these branches are respectively supplied anti-phase to the summing element of the respective other branch. In addition, an evaluation and control circuit is allocated to the branches, the momentary frequency, phase and amplitude of the useful or spurious signal allocated to the respective branch being measured and evaluated therewith and with which the frequency, phase and amplitude of the signal generated in the respective branch is correspondingly set dependent on these measured and evaluation values.