Multi-channel spread spectrum communications system
US7242663B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2002 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Apr 23, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0077
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multi-channel spread spectrum communications system utilizes the combination of spreading codes to represent and transfer information. On the transmitter side, every block of data bits is divided into two sub-blocks of data bits. One sub-block is mapped to a number of spreading codes, while another sub-block is separated further into several smaller sub-blocks with each of them mapped into an M-ary phase. Each selected spreading code is modulated by the corresponding M-ary phase. On the receiver side, first determine the most likely transmitted spreading codes and their respective phases, then reverse map the set of estimated transmitted spreading codes into a block of bits and each of the phases into another block of data bits, and finally combine all these blocks to a single block of data bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.