Multiple user digital receiver apparatus and method with time division multiplexing
US5621730A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1992 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Dec 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital receiver apparatus and method, designed for multiple simultaneous users, digitizes a received analog RF signal and tunes to multiple desired frequencies of the received signal on a time division multiplexed basis. After filtering by a finite impulse response (FIR) filter that also operates in time division multiplexing for multiple service bands, the selected signals are digitally demodulated and signal processed, again on a time-shared basis. Different service bands are accommodated at the same time by separate FIR filters, each including a coefficient memory for its particular service band. The multiplexed frequency signal for each band is multiplied by the coefficients of its respective FIR filter memory in a common complex multiplier. The results are demultiplexed and directed to respective accumulators for decimation in accordance with the FIR coefficient characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.