Receiving device and correlation integrating method
First Claim
1. A receiving device comprising:
- a receiving circuit that receives a satellite signal from a positioning satellite;
a storage circuit that stores a received data sequence obtained by sampling the signal received by the receiving circuit at a given sampling time interval, the sampling time interval being an amount of time between each successive sample;
an estimation circuit that estimates an estimated data sequence, which is obtained when the received signal is sampled at a sampling time shifted by a given shift time from the sampling time of the received data sequence, based on the received data sequence, wherein the shift time is less than the sampling time interval;
a correlation operation circuit that performs a correlation operation on the estimated data sequence and a replica code; and
an integration circuit that integrates the correlation operation result in the correlation operation circuit at a given integration time interval.
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Accused Products
Abstract
In a baseband processing circuit unit, a sample memory stores a received data sequence obtained by sampling a signal received by an RF receiving circuit unit at a given sampling time interval. A data sequence estimating unit estimates an estimated data sequence, which is obtained when the received signal is sampled at a sampling time shifted by a given shift time from the sampling time of the received data sequence, on the basis of the received data sequence stored in the sample memory. A correlation operation unit performs a correlation operation on the estimated data sequence estimated by the data sequence estimating unit 22 and a replica code. An integration unit integrates the correlation operation result from the correlation operation unit at a given integration time interval.
6 Citations
5 Claims
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1. A receiving device comprising:
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a receiving circuit that receives a satellite signal from a positioning satellite; a storage circuit that stores a received data sequence obtained by sampling the signal received by the receiving circuit at a given sampling time interval, the sampling time interval being an amount of time between each successive sample; an estimation circuit that estimates an estimated data sequence, which is obtained when the received signal is sampled at a sampling time shifted by a given shift time from the sampling time of the received data sequence, based on the received data sequence, wherein the shift time is less than the sampling time interval; a correlation operation circuit that performs a correlation operation on the estimated data sequence and a replica code; and an integration circuit that integrates the correlation operation result in the correlation operation circuit at a given integration time interval. - View Dependent Claims (2, 3, 4)
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5. A correlation integrating method comprising:
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acquiring a received data sequence by sampling a signal received from a positioning satellite at a given sampling time interval, the sampling time interval being an amount of time between each successive sample; estimating an estimated data sequence, which is obtained when the received signal is sampled at a sampling time shifted by a given shift time from a sampling time of the received data sequence, based on the received data sequence, wherein the shift time is less than the sampling time interval; performing a correlation operation on the estimated data sequence and a replica code; and integrating the correlation operation result at a given integration time interval.
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Specification