Correlation value calculation for use in a mobile communication system
US6553059B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1998 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Nov 12, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70707
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A correlation value calculating apparatus reduces the calculating time with respect to the whole phase range. The correlation value calculating apparatus for multiplying a reception signal by a spreading code, thereby calculating a correlation value which gives a degree of correlation for the spreading code over a predetermined phase width on a predetermined length unit basis is constructed by: an arrangement for comparing an adaptively set threshold value with a correlation value calculated in an interval shorter than the predetermined length at the time of the calculation of the correlation value; an arrangement for executing the calculation of the correlation value over the whole interval of the predetermined length only in the case where the calculated correlation value exceeds the threshold value; and a discriminating arrangement for stopping the calculation of the correlation value in the case where the correlation value calculated in the interval shorter than the predetermined length does not exceed the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.