Apparatus and method for symbol error correctable modulation and demodulation using frequency selective baseband
US8488648B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2008 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Jun 4, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0042
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided are a method and apparatus using a frequency selective baseband. Symbol-error correction modulation and demodulation is performed by generating a plurality of subgroups by dividing 2N spread codes or orthogonal codes used for frequency spreading into 2M (M<N) spread codes or orthogonal codes; selecting (P+L) subgroups; acquiring P spread codes by inputting M data bits to each of the selected P subgroups to select one spread code among the 2M spread codes of each subgroup; generating L*M parity bits for symbol error correction using P*M data bits inputted to the selected P subgroups; selecting one spread code among the 2M spread codes of the L subgroups by inputting the L*M parity bits to the L subgroups; and selecting the dominant values among the (P+L) spread codes acquired from the (P+L) subgroups to generate transmitting data including the dominant values, where N, M, P, and L are real numbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.