Diversity antenna arrangement
First Claim
1. A diversity antenna arrangement, comprising:
- a plurality of different antennas;
an antenna changeover switch for switching between the different antennas to provide an output signal that represents a signal received from one of the different antennas;
an evaluation circuit for evaluating a reception quality of a signal that is derived from a received signal of at least one of the different antennas and for generating an evaluation signal as a function of the reception quality;
a receiving device to which the signal is fed via the antenna changeover switch;
a control device for driving the antenna changeover switch as a function of the evaluation signal;
a first weighting module that, using a first coefficient, weights the output signal of the changeover switch to provide a first weighted signal;
at least one further antenna providing a further received signal;
a second weighting module that, using a second coefficient, weights the further received signal to provide a second weighted signal;
a summing circuit for producing a weighted composite signal by adding the first weighted signal and the second weighted signal; and
a regulating circuit for generating the first coefficient and the second coefficient by minimizing a temporal amplitude fluctuation of an amplitude of the weighted composite signal, wherein;
the evaluation circuit evaluates a reception quality of the weighted composite signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A diversity antenna arrangement to reduce cost and the number of switching operations between different antennas includes an antenna changeover switch for switching between antennas, and an evaluation circuit for evaluating reception quality of a signal derived from a signal received from at least one of the antennas and conveyed to a receiving device via the antenna changeover switch. The evaluation circuit emits an evaluation signal based on the determined reception quality. A control device drives the antenna changeover switch based on the evaluation signal. A weighting device, using a first coefficient, weights the signal conveyed to the receiving device via the antenna changeover switch, and using a second coefficient, weights a signal received from at least one further antenna. A summing circuit adds the weighted signals. A regulating circuit generates the coefficients to minimize the temporal amplitude fluctuations of the composite signal, which is evaluated by the evaluation circuit.
30 Citations
12 Claims
-
1. A diversity antenna arrangement, comprising:
-
a plurality of different antennas; an antenna changeover switch for switching between the different antennas to provide an output signal that represents a signal received from one of the different antennas; an evaluation circuit for evaluating a reception quality of a signal that is derived from a received signal of at least one of the different antennas and for generating an evaluation signal as a function of the reception quality; a receiving device to which the signal is fed via the antenna changeover switch; a control device for driving the antenna changeover switch as a function of the evaluation signal; a first weighting module that, using a first coefficient, weights the output signal of the changeover switch to provide a first weighted signal; at least one further antenna providing a further received signal; a second weighting module that, using a second coefficient, weights the further received signal to provide a second weighted signal; a summing circuit for producing a weighted composite signal by adding the first weighted signal and the second weighted signal; and a regulating circuit for generating the first coefficient and the second coefficient by minimizing a temporal amplitude fluctuation of an amplitude of the weighted composite signal, wherein; the evaluation circuit evaluates a reception quality of the weighted composite signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of receiving radio signals, the method comprising:
-
weighting, using a first coefficient, a signal received from a first antenna; feeding signals received from a plurality of different antennas to a changeover switch; weighting, using a second coefficient, an output signal of the changeover switch that represents a signal received from one of the plurality of different antennas; feeding the first weighted signal and the second weighted signal to a summing circuit; and actuating the changeover switch as a function of a reception quality of weighted composite signal. - View Dependent Claims (12)
-
Specification