Radio transmitter and receiver
First Claim
Patent Images
1. A radio transceiver comprising:
- a transmitter output stage;
a receiver part;
a transmission/reception antenna which is jointly assigned to the transmitter output stage and the receiver part;
a transmission band-transmitting filter which is connected between the output of the transmitter output stage and an antenna feedpoint;
a reception band-transmitting filter which is connected between the antenna feedpoint and the input of the receiver part;
a compensation element which is connected between the output of the transmitter output stage and the input of the receiver part and compensates crosstalk from a transmission signal element onto the receiver part; and
a compensation control unit to adaptively set compensation characteristics as a function of the input voltage or input power at the input of the receiver part being assigned to the compensation element, wherein a voltage measuring device which is connected to the compensation control unit measures the input voltage of the receiver part, the voltage measuring device comprising a device for IF conversion of the input signal of the receiver part, a bandpass filter which is connected downstream and an AM receiver part which is connected to its output and whose output is used to set the compensation characteristics.
12 Assignments
0 Petitions
Accused Products
Abstract
Radio transceiver, in particular, a mobile telephone having a transmitter output stage, a receiver part, a transmission/reception antenna which is assigned jointly to the transmitter output stage and the receiver part, a transmission band-transmitting filter and a reception band-transmitting filter, having a compensation element, connected between the output of the transmitter output stage and the input of the receiver part, for compensating crosstalk of a transmission signal element onto the receiver part.
-
Citations
6 Claims
-
1. A radio transceiver comprising:
-
a transmitter output stage; a receiver part; a transmission/reception antenna which is jointly assigned to the transmitter output stage and the receiver part; a transmission band-transmitting filter which is connected between the output of the transmitter output stage and an antenna feedpoint; a reception band-transmitting filter which is connected between the antenna feedpoint and the input of the receiver part; a compensation element which is connected between the output of the transmitter output stage and the input of the receiver part and compensates crosstalk from a transmission signal element onto the receiver part; and a compensation control unit to adaptively set compensation characteristics as a function of the input voltage or input power at the input of the receiver part being assigned to the compensation element, wherein a voltage measuring device which is connected to the compensation control unit measures the input voltage of the receiver part, the voltage measuring device comprising a device for IF conversion of the input signal of the receiver part, a bandpass filter which is connected downstream and an AM receiver part which is connected to its output and whose output is used to set the compensation characteristics. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification