ANTENNA DIVERSITY SYSTEM FOR RADIO RECEPTION FOR MOTOR VEHICLES
First Claim
1. An antenna diversity system for radio reception comprising:
- a) a receiver;
b) a plurality of antennas;
c) a plurality of antenna feed lines forming at least one input signal path coupled to said plurality of antennas;
d) a high frequency line coupled to said receiver;
e) an antenna diversity module coupled to said plurality of antenna feed lines, and to said high frequency line said antenna diversity module comprising;
i) at least one addressable logic signal selection switch comprising at least two switching devices for the selection of different antenna reception signals, said at least two switching devices in the form of at least a first switching device having it output coupled to a first output signal path and at least a second switching device having its output coupled to a second output signal path;
ii) a summation circuit which is coupled to said receiver on its output side and has at least two inputs coupled to at least two signal paths, wherein at least one switching device in said at least one addressable logic signal selection switch has at least one output coupled to said summation circuit;
iii) at least one phase rotation device that is disposed along at least one of said signal paths, and is pre-set in phase angle rotation, in a fixed manner wherein a reception signal of said plurality of antennas is switched through to one of said at least two inputs on said summation circuit and wherein with at least one of a set of switch positions of said signal selection switch, the reception signal of another one of said plurality of antennas first passes through said at least one phase rotation device which is set in a fixed manner, and then is switched through another input of said at least two inputs on said summation circuit;
f) an evaluation circuit which evaluates a quality of the reception signal and which is in communication with said at least one addressable logic signal selection switch;
wherein if an interference occurs in a summed signal, said at least one evaluation circuit detects said interference and signals said addressable logic signal selection switch to select a different coordinated setting of a switching position.
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Accused Products
Abstract
An antenna diversity system for radio reception for motor vehicles, which comprises a multi-antenna system having several antennas with antenna feed lines. There can be a diversity switching device for selection of a different reception signal, and an evaluation circuit which evaluates the reception quality of the reception signal just arriving at the receiver. This evaluation circuit is designed to bring a different reception signal in terms of diversity to the receiver if interference occurs, by switching over. This design also includes at least one phase rotation device which is disposed along at least one of the signal paths.
121 Citations
27 Claims
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1. An antenna diversity system for radio reception comprising:
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a) a receiver;
b) a plurality of antennas;
c) a plurality of antenna feed lines forming at least one input signal path coupled to said plurality of antennas;
d) a high frequency line coupled to said receiver;
e) an antenna diversity module coupled to said plurality of antenna feed lines, and to said high frequency line said antenna diversity module comprising;
i) at least one addressable logic signal selection switch comprising at least two switching devices for the selection of different antenna reception signals, said at least two switching devices in the form of at least a first switching device having it output coupled to a first output signal path and at least a second switching device having its output coupled to a second output signal path;
ii) a summation circuit which is coupled to said receiver on its output side and has at least two inputs coupled to at least two signal paths, wherein at least one switching device in said at least one addressable logic signal selection switch has at least one output coupled to said summation circuit;
iii) at least one phase rotation device that is disposed along at least one of said signal paths, and is pre-set in phase angle rotation, in a fixed manner wherein a reception signal of said plurality of antennas is switched through to one of said at least two inputs on said summation circuit and wherein with at least one of a set of switch positions of said signal selection switch, the reception signal of another one of said plurality of antennas first passes through said at least one phase rotation device which is set in a fixed manner, and then is switched through another input of said at least two inputs on said summation circuit;
f) an evaluation circuit which evaluates a quality of the reception signal and which is in communication with said at least one addressable logic signal selection switch;
wherein if an interference occurs in a summed signal, said at least one evaluation circuit detects said interference and signals said addressable logic signal selection switch to select a different coordinated setting of a switching position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An antenna diversity system for radio reception comprising:
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a) a receiver;
b) a plurality of antennas;
c) a plurality of antenna feed lines forming at least one input signal path and coupled to said plurality of antennas;
d) a high frequency line coupled to said receiver;
e) an antenna diversity module coupled to said antenna feed lines, and to said high frequency line said antenna diversity module comprising;
i) at least one addressable logic signal selection switch comprising at least two switching devices for the selection of different antenna reception signals, said at least two switching devices in the form of at least a first switching device having it output coupled to a first output signal path and at least a second switching device having its output coupled to a second output signal path;
ii) a summation circuit which is coupled to said receiver on its output side and coupled to at least two signal paths on its input side, wherein at least one switching device in said at least one addressable logic signal selection switch has at least one output coupled to said summation circuit;
iii) at least one phase rotation device that is coupled to said at least one input signal path formed along said antenna feed lines, and is pre-set in phase angle rotation, in a fixed manner wherein a reception signal of said plurality of antennas is switched through to one of said two inputs on said summation circuit and wherein with at least one of the switch positions of said signal selection switch, the reception signal of another one of said plurality of antennas first passes through said at least one phase rotation device which is set in a fixed manner, and then is switched through another input of said at least two inputs on said summation circuit;
f) an evaluation circuit which evaluates the quality of the reception signal and which is in communication with said at least one addressable logic signal selection switch; and
g) a diversity processor wherein said evaluation circuit transfers an intermediate frequency signal from said receiver to said antenna diversity module, wherein said diversity processor provides for rapid recognition of interference, wherein said diversity processor creates a interference indicator signal for causing said addressable signal selection switch to set a different switching position (a=0, 1, 2, . . . N, b=0, 1, 2, . . . N) and said at least one adjustable phase rotation device to set a different discrete phase rotation angle Φ
.wherein if an interference occurs in a summed signal, said at least one evaluation circuit detects said interference and signals said addressable signal selection switch to select a different coordinated setting of a switching position.
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Specification