Abstract: In a radio receiver, the receive signal is conditioned in parallel in at least two paths, in one path a first mixing oscillator signal lying above a channel center by an absolute value, and in a second path a second mixing oscillator signal lying below the channel center by an absolute value, and furthermore, special components are able to be filtered out using filters, and subsequently the signals are conditioned and/or combined in a suitable manner.

Abstract: An antenna amplifier includes at least one input for connecting to an antenna and at least one output for connecting to a receiver, as well as at least one means of signal-level matching positioned between the input and the output. The antenna amplifier improves the noise-to-useful signal ratio, in particular in situations in which a noise signal having a high level is applied, by providing a narrow-band filter situated between the input and the means of signal-level matching, with the mid-frequency of the filter passband being able to be changed and tuned to the receive channel of the receiver.

Abstract: A receiver unit, having at least two signal receivers for analog received signals, an analog-digital converter for converting the analog received signals into digital received signals, and having a signal processing unit for the digital received signals, has at least at least one adder at the output of the signal receivers for adding the analog received signals, the adder being connected with its output to the input of a common analog-digital converter and the digital signal processing unit being configured to separate the added received signals.