| 发明名称 | Bit change determination method and bit change determination device | ||
| 摘要 | A bit change determination method includes performing a correlation operation of a signal received from a satellite and a replica code, segmenting the signal using a bit transition timing of navigation message data and performing a first calculation to calculate the result of the correlation operation for a first period having N (N≧1) continuous unit periods with a bit period of navigation message data as a unit period, performing a second calculation to calculate the result of the correlation operation for a second period having M (M>1) continuous unit periods adjacent to the first period, and determining whether a bit value changes or not at a boundary between the first period and the second period using the first and second calculation results. | ||
| 申请公布号 | US8761232(B2) | 申请公布日期 | 2014.06.24 |
| 申请号 | US201113225307 | 申请日期 | 2011.09.02 |
| 申请人 | Seiko Epson Corporation | 发明人 | Gobara Naoki;Nagahara Mikio |
| 分类号 | H04B1/709 | 主分类号 | H04B1/709 |
| 代理机构 | Kilpatrick Townsend & Stockton LLP | 代理人 | Kilpatrick Townsend & Stockton LLP |
| 主权项 | 1. A bit change determination method comprising: performing a correlation operation of a signal received from a satellite and a replica code; segmenting the signal using a bit transition timing of navigation message data and performing a first calculation to calculate the result of the correlation operation for a first period having N (N≧1) continuous unit periods with a bit period of navigation message data as a unit period; performing a second calculation to calculate the result of the correlation operation for a second period having M (M>1) continuous unit periods adjacent to the first period; determining whether a bit value changes or not at a boundary between the first period and the second period using the first and the second calculation results; and changing at least one of N and M on the basis of the reception situation of the satellite signal. | ||
| 地址 | Tokyo JP | ||