Spectrum spreading or despreading device, in particular for transmission in a code division multiple access cellular mobile radio system
US7023830B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1999 |
| Grant date | Apr 4, 2006 |
| Priority date | — |
| Expiry date | Apr 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70703
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A spectrum spreading of despreading device, in particular for transmission in a code division multiple access cellular mobile radio system is disclosed. In order to spread or despread an incoming sequence by means of spreading code of length Q, first, the data symbols of the income sequence are distributed into difference sub-sequences, and then each of the sub-sequences are spread or despread using a spreading code of length Q0 that is a multiple of length Q. The sub-sequences and the spreading codes of length Q0 that are applied to them are determined so that the sequence that would be obtained by superimposing the spread or despread sub-sequences obtained in this way is the same as that which would be obtained by spreading or despreading the incoming sequence using the code of length Q.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.