Digital multi-channel demultiplexer/multiplexer (MCD/M) architecture
US6351451B1 · kind B1 · utility
7Cited by
17References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jul 25, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J1/05
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A computationally efficient digital signal processing (DSP) system is provided for multiplexing/demultiplexing a large number of closely spaced FDM channels. Sub-band definition filtering divides the FDM channel band, comprised of N channels into K sub-bands, in order to reduce the dimension of polyphase filter fast-Fourier transform for completing the multiplexing/demultiplexing. This reduces the order of the required prototype by a factor proportional to K and allows small size, lightweight DSP implementations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.