Channel spreading device and method for CDMA communication system
US6807221B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1999 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Nov 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A channel spreading device for a base station in a CDMA communication system is described. The device comprises a spreading code generator for generating a real-component spreading code and an imaginary-component spreading code corresponding to a designated channel spreading code index; a circuit receiving a mode control signal, for disabling generation of the imaginary-component spreading code when the received mode control signal indicates a BPSK (Binary Phase Shift Keying) modulation mode; and a complex multiplier receiving a channel signal, for complex multiplying the received channel signal by the spreading codes to spread the channel signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.