Method and system for selecting cyclic prefix length based on signal quality reports
US8422577B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2011 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Jun 23, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0026
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
During a first time interval, an access point transmits orthogonal frequency division multiplexing (OFDM) signals using a first cyclic prefix length. The access point receives a plurality of signal reports, such as Channel Quality Indicators (CQIs), from user devices being served by the access point. Based on the signal reports, the access point determines a distribution of signal qualities experienced by the user devices. The access point selects a second cyclic prefix length based, at least in part, on the distribution of signal qualities. The access point transmits OFDM signals using the second cyclic prefix length during a second time interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.