Small-footprint digital synthesis channelizer for multiple narrowband frequency-slices
US10333639B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2018 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | May 9, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6118
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital synthesis channelizer includes a memory buffer and circuitry. The memory buffer stores samples of N input signals having a sampling rate Fsi. The N input signals are processed, prior to storing in the memory buffer, by an N-point time-frequency transform module. The circuitry includes at least P filters derived from a Low-Pass Filter whose stopband frequency depends on Fsi. The circuitry is configured to set a sampling time according to a predefined output sampling rate Fso=λ·Fsi, λ being a predefined rate-conversion ratio, to select based on the sampling time one or more filters out of the at least P filters, and using the selected one or more filters, to generate, from at least some of the samples in the memory buffer, a filtered and interpolated output sample of an output signal that sums N digitally resampled by λ and frequency-shifted versions of the respective N input signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.