Demodulation method, demodulation device, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorHideo Sasahara
Life of this patent
Estimating the term…
Abstract
A satellite signal which carries a navigation message including satellite-specific information is received. Data of the navigation message is demodulated from received satellite signal. Error detection processing is carried out on demodulated data on a word basis of the navigation message. The number of bit transitions is counted at each corresponding bit transition position with respect to a first word in which an error is detected in the error detection processing and which carries the satellite-specific information, and plural second words belonging to a different frame from a frame to which the first word belongs and having a common part with the first word. A bit value of the first word is detected based on the number of bit transitions counted.
Claims5
A demodulation method comprising:
- receiving a satellite signal which carries a navigation message including satellite-specific information;
- demodulating data of the navigation message from received satellite signal;
- carrying out error detection processing on demodulated data on a word basis of the navigation message;
- counting the number of bit transitions at each corresponding bit transition position with respect to a first word in which an error is detected in the error detection processing and which carries the satellite-specific information, and plural second words belonging to a different frame from a frame to which the first word belongs and having a common part with the first word;
- and
- detecting a bit value of the first word based on the number of bit transitions counted.
A demodulation device comprising:
- a receiving unit which receives a satellite signal which carries a navigation message including satellite-specific information;
- a demodulation unit which demodulates data of navigation message from the received satellite signal;
- an error detection processing unit which carries out error detection processing on demodulated data on a word basis of the navigation message;
- a bit transition count unit which counts the number of bit transitions at each corresponding bit transition position with respect to a first word in which an error is detected in the error detection processing and which carries the satellite-specific information, and plural second words belonging to a different frame from a frame to which the first word belongs and having a common part with the first word;
- and
- a data detection unit which detects a bit value of the first word based on the number of bit transitions counted.
Dependencies are inferred from the claim text.