Signal acquisition method, signal acquisition apparatus and electronic device
AssigneeSeiko Epson Corporation
InventorShunichi Mizuochi
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Abstract
A signal acquisition method includes: frequency-converting the frequency of a reception signal which is a satellite signal received from a positioning satellite into a specific frequency corresponding to a bit length of navigation message data carried by the satellite signal; performing a first correlation operation according to a signal of the frequency-converted specific frequency; integrating results of the first correlation operation over a predetermined time longer than the bit length; and acquiring the satellite signal using the integrated results.
Claims6
A signal acquisition method comprising:
- frequency-converting a frequency of a reception signal which is a satellite signal received from a positioning satellite into a specific frequency corresponding to a bit length of navigation message data carried by the satellite signal;
- performing a first correlation operation according to a signal of the frequency-converted specific frequency;
- integrating results of the first correlation operation over a predetermined time longer than the bit length;
- and
- acquiring the satellite signal using the integrated results.
A signal acquisition apparatus comprising:
- a receiving section which receives a satellite signal from a positioning satellite;
- a frequency converting section which converts a frequency of a reception signal which is received by the receiving section into a specific frequency corresponding to a bit length of navigation message data carried by the satellite signal;
- a correlation operating section which performs a correlation operation according to a signal of the specific frequency frequency-converted by the frequency converting section;
- an integrating section which integrates results of the correlation operation over a predetermined time longer than the bit length;
- and
- an acquiring section which acquires the satellite signal using the correlation operation results integrated by the integrating section.
Dependencies are inferred from the claim text.