Method and arrangement for antenna selection control in a radio receiver
First Claim
1. A method for antenna selection control in a radio transmission/reception means, in particular of a base station or of a mobile part of a cordless telephone, with a measuring means for measuring first field strength values of signals received via two antennas, with a threshold value generator for formation of first threshold values, and having a central processor, comprising the steps of:
- comparing, via the control processor, a first field strength value, respectively measured at one of the two antennas, with a respectively formed first threshold value, and that respectively controls a no-change to the respective other antenna, if the respectively measured first field strength value is larger than the respectively formed first threshold value or is equal to the respectively formed first threshold value; and
forming the first threshold value such thata) the first threshold value, respectively formed for a first field strength value/threshold value comparison, remains respectively unchanged for a subsequent second field strength value/threshold value comparison, if, in a first field strength value comparison between a respective currently measured first field strength value and a respective last-measured first field strength value, the respective currently measured first field strength value is respectively smaller than the respective last-measured first field strength value or is equal to the respective last-measured first field strength value, whereby, for a subsequent second field strength value comparison, the respective last-measured first field strength value is respectively replaced by the respective currently measured first field strength value;
b) for a subsequent second field strength value/threshold value comparison, the first threshold value, respectively formed for a first field strength value/threshold value comparison, is respectively replaced by a difference between a respective currently measured first field strength value and a correction value, if, in a first field strength value comparison between a respective currently measured first field strength value and a respective last-measured first field strength value, the respective currently measured first field strength value is respectively larger than the respective last-measured first field strength value, whereby, for a subsequent second field strength value comparison, the respective last-measured first field strength value is respectively replaced by the respective currently measured first field strength value.
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Accused Products
Abstract
The method and arrangement is for controlling a radio receiver. The arrangement has a central processor (DECT-C), a device (RSSI-C) for measuring the field strength of received signals, a threshold value generator (TH-C) and two antennas (A1, A2). The central processor (DECT-C) carries out method steps configured in such a way that different procedures (P1, P2) are realized to activate one of a plurality of antennas (A1, A2) of the radio receiver as a function of measured field strength values (RSSI1) of received signals and as a function of overshooting or undershooting of a threshold value (TH0).
56 Citations
32 Claims
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1. A method for antenna selection control in a radio transmission/reception means, in particular of a base station or of a mobile part of a cordless telephone, with a measuring means for measuring first field strength values of signals received via two antennas, with a threshold value generator for formation of first threshold values, and having a central processor, comprising the steps of:
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comparing, via the control processor, a first field strength value, respectively measured at one of the two antennas, with a respectively formed first threshold value, and that respectively controls a no-change to the respective other antenna, if the respectively measured first field strength value is larger than the respectively formed first threshold value or is equal to the respectively formed first threshold value; and forming the first threshold value such that a) the first threshold value, respectively formed for a first field strength value/threshold value comparison, remains respectively unchanged for a subsequent second field strength value/threshold value comparison, if, in a first field strength value comparison between a respective currently measured first field strength value and a respective last-measured first field strength value, the respective currently measured first field strength value is respectively smaller than the respective last-measured first field strength value or is equal to the respective last-measured first field strength value, whereby, for a subsequent second field strength value comparison, the respective last-measured first field strength value is respectively replaced by the respective currently measured first field strength value; b) for a subsequent second field strength value/threshold value comparison, the first threshold value, respectively formed for a first field strength value/threshold value comparison, is respectively replaced by a difference between a respective currently measured first field strength value and a correction value, if, in a first field strength value comparison between a respective currently measured first field strength value and a respective last-measured first field strength value, the respective currently measured first field strength value is respectively larger than the respective last-measured first field strength value, whereby, for a subsequent second field strength value comparison, the respective last-measured first field strength value is respectively replaced by the respective currently measured first field strength value. - View Dependent Claims (2, 3, 28)
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4. A method for antenna selection control in a radio transmission/reception means, in particular of a base station or of a mobile part of a cordless telephone, with a measuring means for measuring first field strength values of signals received via two antennas, with a threshold value generator for formation of first threshold values and with a central processor, comprising the steps of:
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controlling, via the central processor, a change from one antenna to the respective other antenna, if a respectively measured first field strength value is smaller than a respectively formed first threshold value; and forming the first threshold value as a maximum value from a difference between a respective currently measured first field strength value and a correction value, as well as a respective second field strength value measured last before a change of antenna.
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5. An arrangement for antenna selection control in a radio transmission/reception means, in particular of a base station or of a mobile part of a cordless telephone, comprising:
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a measuring means for measuring first field strength values of signals received via two antennas; a threshold value generator for formation of first threshold values; a central processor, for comparing the first field strength value, measured respectively at one of the two antennas with a respectively formed first threshold value, and for controlling a no-change to the respective other antenna, if the respectively measured first field strength value is larger than the respectively formed first threshold value or is equal to the respectively formed first threshold value; means allocated to the central processor, which, for the formation of the respective first threshold value, are structured such that a) the first threshold value, respectively formed for a first field strength value/threshold value comparison, remains respectively unchanged for a subsequent second field strength value/threshold value comparison, if, in a first field strength value comparison between a respective currently measured first field strength value and a respective last-measured first field strength value, the respective currently measured first field strength value is respectively smaller than the respective last-measured first field strength value or is equal to the respective last-measured first field strength value, whereby, for a subsequent second field strength value comparison, the respective last-measured first field strength value is respectively replaced by the respective currently measured first field strength value; b) for a subsequent second field strength value/threshold value comparison, the first threshold value, respectively formed for a first field strength value/threshold value comparison, is respectively replaced by a difference between a respectively currently measured first field strength value and a correction value, if, in a first field strength value comparison between a respective currently measured first field strength value and a respective last-measured first field strength value, the respective currently measured first field strength value is respectively larger than the respective last-measured first field strength value, whereby, for a subsequent second field strength value comparison, the respective last-measured first field strength value is respectively replaced by the respective currently measured first field strength value. - View Dependent Claims (6, 7, 8)
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9. An arrangement for antenna selection control in a radio transmission/reception means, in particular of a base station or of a mobile part of a cordless telephone, comprising:
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a measuring means for measuring first field strength values of signals received via two antennas, with a threshold value generator for formation of first threshold values and with a central processor that respectively controls a change from one antenna to the respective other antenna, if the respectively measured first field strength value is smaller than the respectively formed first threshold value; and means allocated to the central processor that are structured such that the first threshold value is respectively formed as a maximum value from the difference between a respective currently measured first field strength value and a correction value, as well as a first field strength value measured last before a change of antenna. - View Dependent Claims (10, 11, 12)
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13. A method for controlling antenna selection in a radio receiver, having a plurality of antennas and, having a device for measuring field strengths of received signals, and having a central processor, which forms at least one threshold value from the measured field strengths, comprising the steps of:
- via the central processor realizing different selection procedures as a function of measured field strength values of received signals and as a function of their overshooting or undershooting a first threshold value; and
via the central processor making within each selection procedure a decision to activate one of the plurality of antennas of the radio receiver independently of the first threshold value, that is, said decision to activate is determined separately from a selection of a procedure. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
- via the central processor realizing different selection procedures as a function of measured field strength values of received signals and as a function of their overshooting or undershooting a first threshold value; and
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22. An arrangement for controlling antenna selection in a radio receiver having a plurality of antennas and, having a device for measuring field strengths of received signals, and having a central processor, which forms at least one threshold value from the measured field strengths, comprising:
- means assigned to the central processor for realizing different selection procedures as a function of measured field strength values of received signals and as a function of their overshooting or undershooting of a first threshold value; and
means for making, during each selection procedure a decision to activate one of the plurality of antennas of the radio receiver independently of the first threshold value, that is, said decision to activate is determined separately form a selection of a procedure. - View Dependent Claims (23, 24, 25, 26, 27, 29, 30, 31, 32)
- means assigned to the central processor for realizing different selection procedures as a function of measured field strength values of received signals and as a function of their overshooting or undershooting of a first threshold value; and
Specification