Method for quasi-synchronous code division multiple access based on synchronization clock by piloting
US12081315B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 28, 2020 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Jun 29, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/0446
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for quasi-synchronous code division multiple access based on synchronization clock by piloting can make CDMA operate in quasi-synchronous conditions, so it is suitable for open wireless channels with relay nodes, such as satellite communication systems, and open wireless channels without relay nodes. The method includes: adopting a mode of CDMA spread spectrum transmission to share power resources to transmit signals at multiple transmitting stations in open wireless channels; adopting an external pilot signal to provide synchronization clock for the CDMA signals transmitted by multiple terminal stations in the open wireless channels, eliminating path delay differences from the multiple terminal stations to a relay node or receiving station, and making multi-channel CDMA signals received at the relay node or receiving station clock synchronized and phase aligned. The method can realize the quasi-synchronous reception of multi-channel CDMA signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.