Correlation calculating method, satellite signal capturing method, and correlation calculating circuit
AssigneeSeiko Epson Corporation
InventorsMaho Terashima, Naoki Gobara
Life of this patent
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Abstract
A correlation calculating method of correlating a received code signal obtained by demodulating a received signal, which is a signal obtained by receiving a positioning satellite signal, with a replica code signal is provided which includes: correlating values of the replica code signal in a chip period with values of the received code signal at first to n-th arrival times obtained by varying an arrival time of the chip period by 1/n chip (where n is an integer equal to or greater than 2); and acquiring a correlation calculation result at a 1/n chip interval by synthesizing the correlation calculation results.
Claims3
A correlation calculating method of correlating a received code signal obtained by demodulating a received signal, which is a signal obtained by receiving a positioning satellite signal, with a replica code signal, comprising:
- correlating values of the replica code signal in a chip period with values of the received code signal at first to n-th arrival times obtained by varying an arrival time of the chip period by 1/n chip (where n is an integer equal to or greater than 2);
- and
- acquiring a correlation calculation result at a 1/n chip interval by synthesizing the correlation calculation results.
A correlation calculating circuit correlating a received code signal obtained by demodulating a received signal, which is a signal obtained by receiving a positioning satellite signal, with a replica code signal, comprising:
- a correlation calculating unit that correlates values of the replica code signal in a chip period with values of the received code signal at first to n-th arrival times obtained by varying an arrival time of the chip period by 1/n chip (where n is an integer equal to or greater than 2);
- and
- a synthesis unit that acquires a correlation calculation result at a 1/n chip interval by synthesizing the correlation calculation results.
Dependencies are inferred from the claim text.