Method and apparatus for transmission and reception within an OFDM communication system
US6999467B2 · kind B2 · utility
32Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Oct 31, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0202
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A staggered spread OFCDM scheme is utilized that improves channel estimation. In a first embodiment, each chip stream is time shifted by a predetermined amount and then transmitted on a predetermined subcarrier. This results in time-spread symbols being staggered (time-offset) on different subcarriers allowing for more frequent sampling of the channel. In a second embodiment a staggered spreading approach is applied in the frequency dimension to improve the performance of a system with spreading in the frequency dimension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.