Radio receiving apparatus and radio receiving method
First Claim
Patent Images
1. A radio receiving apparatus comprising:
- a detection unit that detects an occurrence of intermodulation interference to a desired signal demodulated based on received signals received by a plurality of antenna elements; and
a directivity changing unit that changes a reception directivity pattern of the plurality of antenna elements to another pattern having a null direction different from a null direction obtained before the directivity pattern is changed, in accordance with detection of the occurrence of the intermodulation interference by the detection unit.
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Abstract
A radio receiving apparatus includes a detection unit and a directivity changing unit. The detection unit detects an occurrence of intermodulation interference to a desired signal demodulated based on received signals received by a plurality of antenna elements. The directivity changing unit changes a reception directivity pattern of the plurality of antenna elements to another pattern having a null direction different from a null direction obtained before the directivity pattern is changed, in accordance with detection of the occurrence of the intermodulation interference by the detection unit.
36 Citations
14 Claims
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1. A radio receiving apparatus comprising:
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a detection unit that detects an occurrence of intermodulation interference to a desired signal demodulated based on received signals received by a plurality of antenna elements; and a directivity changing unit that changes a reception directivity pattern of the plurality of antenna elements to another pattern having a null direction different from a null direction obtained before the directivity pattern is changed, in accordance with detection of the occurrence of the intermodulation interference by the detection unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radio receiving apparatus comprising:
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an analog signal processing unit that performs analog signal processing on received signals received by a plurality of antenna elements; an A/D conversion unit that generates digital signals by sampling the received signals subjected to the analog signal processing; and a plurality of digital filters capable of adjusting amplitudes and phases of the digital signals; a signal combining unit that generates a composite signal by combining the digital signals subjected to filter processing by the plurality of digital filters; and a coefficient updating unit that updates tap coefficients of the plurality of digital filters, the tap coefficients determining a reception directivity pattern of the plurality of antenna elements, wherein the coefficient updating unit updates the tap coefficients in accordance with an adaptive algorithm, and performs exceptional updating of at least one of the tap coefficients independently of the adaptive algorithm, in accordance with detection of an occurrence of intermodulation interference to a desired signal demodulated based on the composite signal. - View Dependent Claims (11, 12)
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13. A radio receiving method comprising:
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detecting an occurrence of intermodulation interference to a desired signal demodulated from a composite signal of received signals received by a plurality of antenna elements, or from one received signal included in the received signals; and changing a reception directivity pattern of the plurality of antenna elements to another pattern having a null direction in a direction different from a null direction obtained before the directivity pattern is changed, in accordance with detection of the occurrence of the intermodulation interference. - View Dependent Claims (14)
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Specification