IT1264448B1 - Digital receiver for class messages - Google Patents
Digital receiver for class messagesInfo
- Publication number
- IT1264448B1 IT1264448B1 IT93MI000986A ITMI930986A IT1264448B1 IT 1264448 B1 IT1264448 B1 IT 1264448B1 IT 93MI000986 A IT93MI000986 A IT 93MI000986A IT MI930986 A ITMI930986 A IT MI930986A IT 1264448 B1 IT1264448 B1 IT 1264448B1
- Authority
- IT
- Italy
- Prior art keywords
- samples
- band
- pass filter
- signal
- output
- Prior art date
Links
- 238000005070 sampling Methods 0.000 abstract 2
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Receiver for class messages which, in one embodiment, can be incorporated in a digital signal processor. An FSK demodulator receives linear incoming samples of the signal and filters them with a band-pass filter which carries out an excess sampling to increase the sampling rate from 8,000 Hz to 24,000 Hz, resulting in 20 samples at the output of the band-pass filter for each incoming data bit. The amplitude of the signal/samples at the output of the band-pass filter is controlled by an automatic gain control circuit AGC and the resulting samples (referred to for convenience as sample t, in which t is a discrete moment of time) are processed along two different designated paths to estimate the probability of the input signal which encodes a symbol (symbol estimation path) or a space (space estimation path). <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA 2069142 CA2069142C (en) | 1992-05-21 | 1992-05-21 | Digital class receiver |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI930986A0 ITMI930986A0 (en) | 1993-05-14 |
ITMI930986A1 ITMI930986A1 (en) | 1994-11-14 |
IT1264448B1 true IT1264448B1 (en) | 1996-09-23 |
Family
ID=4149876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT93MI000986A IT1264448B1 (en) | 1992-05-21 | 1993-05-14 | Digital receiver for class messages |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA2069142C (en) |
IT (1) | IT1264448B1 (en) |
MX (1) | MX9302978A (en) |
-
1992
- 1992-05-21 CA CA 2069142 patent/CA2069142C/en not_active Expired - Fee Related
-
1993
- 1993-05-14 IT IT93MI000986A patent/IT1264448B1/en active IP Right Grant
- 1993-05-21 MX MX9302978A patent/MX9302978A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ITMI930986A0 (en) | 1993-05-14 |
ITMI930986A1 (en) | 1994-11-14 |
CA2069142A1 (en) | 1993-11-22 |
CA2069142C (en) | 1996-04-02 |
MX9302978A (en) | 1993-11-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19960531 |