Subcarrier allocation apparatus and method, subcarrier de-allocation apparatus and method in OFDM system
US8134914B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 10, 2005 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | Jun 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0092
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A subcarrier allocating apparatus allocating data to be transmitted to a plurality of orthogonal subcarriers in an orthogonal frequency division multiplexing (OFDM) system is provided. The apparatus includes a logical index generator generating a logical index for allocating a data subcarrier to a physical index, the logical index being included with only data subcarriers and the physical index indicating a location of a substantial subcarrier within a symbol, an intermediate index converter converting the logical index into an intermediate index by performing a given operation on the generated logical index and a pilot location constant, and a physical index converter converting the intermediate index into a physical index based on the number of data subcarriers on the left and right sides of a null subcarrier for insertion of a guard interval formed by the null subcarrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.