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US 6,476,765 B2Granted
Reception circuit and adaptive array antenna system
AssigneeNEC Corporation
InventorYoshitaka Kawanabe
Life of this patent
Estimating the term…
Abstract
A reception circuit includes a reception section and control section. The reception section performs frequency conversion of an input signal by using a local frequency signal generated by phase comparing operation. The control section removes a passing phase error, added in the reception section, on the basis of a phase comparison signal output from the reception section. An adaptive array antenna system is also disclosed.
Claims16
A reception circuit comprising:
- a reception section for performing frequency conversion of an input signal by using a local frequency signal generated by phase comparing operation;
- and
- a control section for removing a passing phase error from a reception output signal, added in said reception section, on the basis of a phase comparison signal output from said reception section.
An adaptive array antenna system comprising:
- a plurality of antennas;
- a reference oscillator for outputting a reference frequency;
- a plurality of reception sections, which are provided in correspondence with said antennas, generate local frequency signals by comparing a phase of the reference frequency from said reference oscillator with phases of local oscillation signals, and perform frequency conversion of input signals by using the generated local frequency signals;
- and
- a control section for removing passing phase errors from reception output signals, added in said reception section, on the basis of phase comparison signals output from said reception sections.
2 more elements
A reception circuit comprising:
- means for converting a frequency of an input signal with reference to a local frequency signal generated by a phase comparing operation;
- and
- means for correcting a phase error in a reception output signal with reference to a phase comparison signal output from said frequency converting means.
An adaptive array antenna system comprising:
- a plurality of antennas;
- a plurality of reception sections connected to said plurality of antennas;
- and
- a reference oscillator connected to said plurality of reception sections, said reference oscillator for outputting a reference frequency,
- wherein said plurality of reception sections generate local frequency signals by comparing a phase of the reference frequency from said reference oscillator with phases of local oscillation signals.
2 more elements
Dependencies are inferred from the claim text.