| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve accuracy of synchronization acquisition of reception signals from an artificial satellite such as a GPS satellite, with a simple configuration.SOLUTION: A Doppler shift amount calculation unit calculates a Doppler shift amount of a reception signal from an artificial satellite. A sampling interval setting unit sets a sampling interval for downsampling an A/D converted reception signal on the basis of the calculated Doppler shift amount. A downsampling unit downsamples the A/D converted reception signal by using the set sampling interval. A coherent addition unit performs coherent addition on the downsampled reception signal. A PN generation unit generates a spread code. A phase detection unit performs correlation operation between an operation result of the coherent addition and the generated spread code, and detects a phase of the spread code of the reception signal on the basis of a result of the correlation operation. The technology can be applied to a GPS receiver, for example.</p> |
