Radio-frequency receiver device
First Claim
1. A radio-frequency receiver device including a plurality of receiver antenna elements each arranged to receive signals transmitted from communication objects, said radio-frequency receiver device comprising:
- a phased-array control portion configured to perform a phased array antenna control for controlling a directivity of reception of the signals by said plurality of receiver antenna elements;
an adaptive-array control portion configured to perform an adaptive array antenna control for controlling the directivity of reception of the signals by said plurality of receiver antenna elements;
a received-signal-quality determining portion configured to determine whether the signals received by said plurality of receiver antenna elements have a quality of at least than a predetermined threshold; and
a directivity control switching portion configured to enable said phased-array control portion to perform said phased array antenna control for controlling said directivity of reception of the signals, and to enable said adaptive-array control portion to perform said adaptive array antenna control for controlling said directivity of reception of the signals only if said received-signal-quality determining portion makes a negative determination that the quality of at least one signal is less than the predetermined threshold after said phased array antenna control.
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Accused Products
Abstract
A radio-frequency receiver device including receiver antenna elements each arranged to receive a signal from a desired communication object, a phased-array control portion to perform a phased array antenna control for controlling the directivity of reception of the signals by the receiver antenna elements, an adaptive-array control portion to perform an adaptive array antenna control for controlling the directivity of reception of the signals by the receiver antenna elements, a received-signal-quality determining portion to determine whether the signals received by the receiver antenna elements has a quality higher than a predetermined threshold, and a directivity control switching portion configured to enable the phased-array control portion to perform the phased array antenna controls, and to enable the adaptive-array control portion to perform the adaptive array antenna control only if a negative determination is obtained by the received-signal-quality determining portion after the phased array antenna control.
17 Citations
15 Claims
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1. A radio-frequency receiver device including a plurality of receiver antenna elements each arranged to receive signals transmitted from communication objects, said radio-frequency receiver device comprising:
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a phased-array control portion configured to perform a phased array antenna control for controlling a directivity of reception of the signals by said plurality of receiver antenna elements; an adaptive-array control portion configured to perform an adaptive array antenna control for controlling the directivity of reception of the signals by said plurality of receiver antenna elements; a received-signal-quality determining portion configured to determine whether the signals received by said plurality of receiver antenna elements have a quality of at least than a predetermined threshold; and a directivity control switching portion configured to enable said phased-array control portion to perform said phased array antenna control for controlling said directivity of reception of the signals, and to enable said adaptive-array control portion to perform said adaptive array antenna control for controlling said directivity of reception of the signals only if said received-signal-quality determining portion makes a negative determination that the quality of at least one signal is less than the predetermined threshold after said phased array antenna control. - View Dependent Claims (2, 3, 4, 6, 7)
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5. A radio-frequency receiver device including a plurality of receiver antenna elements each arranged to receive signals transmitted from communication objects, said radio-frequency receiver device comprising:
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a phased-array control portion configured to perform a phased array antenna control for controlling a directivity of reception of the signals by said plurality of receiver antenna elements; an adaptive-array control portion configured to perform an adaptive array antenna control for controlling the directivity of reception of the signals by said plurality of receiver antenna elements; a received-signal-quality determining portion configured to determine whether the signals received by said plurality of receiver antenna elements have a quality of at least a predetermined threshold; and a directivity control switching portion configured to enable said phased-array control portion to perform said phased array antenna control for controlling said directivity of reception of the signals, and to enable said adaptive-array control portion to perform said adaptive array antenna control for controlling said directivity of reception of the signals only if said received-signal-quality determining portion makes a negative determination that the quality of at least one signal is less than the predetermined threshold after said phased array antenna control, wherein said received-signal-quality determining portion comprises an interfering-wave determining portion configured to determine whether the signals received by said plurality of receiver antenna elements include an interfering wave, and said received-signal-quality determining portion makes the negative determination when said interfering-wave determining portion determines that at least one signal includes an interfering wave.
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8. A radio-frequency receiver device comprising:
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a plurality of antenna elements each arranged to receive, by radio communication, a signal transmitted from a plurality of communication objects; a first control portion configured to perform a first control of gradually changing a directivity of reception of said plurality of antenna elements; a second control portion configured to perform a second control of changing said directivity of reception of said plurality of antenna elements, said second control portion comprising an adaptive-array control portion for maximizing a sensitivity of reception of the signals from said communication objects; a directivity control portion configured to control the directivity of reception of said plurality of antenna elements, by operating said first and second control portions, said directivity control portion includes; a weight determining portion configured to determine weights to be given to the signals received by said plurality of antenna elements, on the basis of the result of said first control by said first control portion, such that a composite signal obtained by combining together the signals multiplied by the determined weights approaches a reference signal; and a composite-signal generating portion configured to generate said composite signal by combining together the signals multiplied by said weights determined by said weight determining portion; and a demodulating portion configured to demodulate said composite signal generated by said composite-signal generating portion, or a signal based on said composite signal, wherein said directivity control portion operates said second control portion to maximize the sensitivity of reception of the signals from said communication objects, on the basis of a result of said first control by said first control portion, and wherein said directivity control portion further includes a judging portion configured to determine whether the signals received by said plurality of antenna elements are signals received from said communication objects, depending upon a result of a demodulating operation of said demodulating portion, and said weight determining portion determines said weights on the basis of a result of a judgment by said judging portion. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification