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DEVICE FOR ESTIMATING AZIMUTH, DIRECTIONAL CONTROLLED ANTENNA DEVICE, AND METHOD FOR ESTIMATING AZIMUTH
DEVICE FOR ESTIMATING AZIMUTH, DIRECTIONAL CONTROLLED ANTENNA DEVICE, AND METHOD FOR ESTIMATING AZIMUTH
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机译:用于估计方位的设备,方向受控的天线设备以及用于估计方位的方法
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摘要
PROBLEM TO BE SOLVED: To generate a complex digital signal (IQ signal) intermittently and non-periodically to estimate a coming-in direction of a radio wave even when analysis times for signal processing are dispersed. ;SOLUTION: An IQ generating part 105 makes a sampling frequency brought into 4N times or 4N/3 times that of an intermediate frequency signal based on an indication of an azimuth estimating part 106 using a received digital signal provided by an A/D conversion part 103, and generates the complex digital (IQ signal) intermittently and non-periodically in timing when calculation for signal processing is finished, using two values provided in (N-1) sample periods (where N is a natural number). The azimuth estimating part 106 estimates the comming-in direction of the received radio wave using an I-signal and a Q-signal output from the IQ generating part 105.;COPYRIGHT: (C)2001,JPO
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