Demodulation method and apparatus incorporating charge coupled devices
US5126682A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1991 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Mar 18, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0062
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A demodulator apparatus for demodulating a data bearing broadcast signal in the absence of mixers and without incurring quantization errors. The apparatus incorporates a receiver for receiving a broadcast signal and producing therefrom a predetermined intermediate carrier frequency (F.sub.IF), transversal filter connected to receive the intermediate carrier frequency F.sub.IF has N active stages and tap weight means at each of said stages for entering a tap weight sequence to yield maximum correlation energy when desired alignment occurs to thereby make phase and frequency agreement between local timing and the received signal, and the frequency F.sub.IF is sampled at a clock rate (F.sub.s) of: ##EQU1## wherein F.sub.IF is the intermediate frequency and K is a scaling factor which is related to the number of carrier cycles per stage, the transversal filter includes a charge coupled device having the N active stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.