CA2199709A1 - Channel-independent equalizer device - Google Patents
Channel-independent equalizer deviceInfo
- Publication number
- CA2199709A1 CA2199709A1 CA002199709A CA2199709A CA2199709A1 CA 2199709 A1 CA2199709 A1 CA 2199709A1 CA 002199709 A CA002199709 A CA 002199709A CA 2199709 A CA2199709 A CA 2199709A CA 2199709 A1 CA2199709 A1 CA 2199709A1
- Authority
- CA
- Canada
- Prior art keywords
- values
- memory means
- information symbols
- controller
- sample values
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A demodulator for demodulating a signal modulated with digital information symbols so as to extract the information symbols is disclosed. A receiver receives a signal over a communications channel and samplers and digitizers produce a sequence of numerical sample values representative of the received signal. Memories are provided each having a number of state memories each associated with a hypothesized symbol string. A controller selectively retrieves values from the memory means and controls the timing of operations thereupon.
A metric computer computes candidate metrics using a hypothesis of a next of the information symbols to be demodulated made by the controller, one of the numerical sample values, path metric values, B-matrices, and U-vectors and the candidate metrics associated state number selected by the controller from memory means. A best predecessor computer determines the best of the candidate metrics to be selected to be written back into the memory means along with a successor B-matrix, U-vector and path history. The successor B-matrices, U-vectors and path history are then updated using corresponding values associated with the best predecessor and one of numerical sample values.
A metric computer computes candidate metrics using a hypothesis of a next of the information symbols to be demodulated made by the controller, one of the numerical sample values, path metric values, B-matrices, and U-vectors and the candidate metrics associated state number selected by the controller from memory means. A best predecessor computer determines the best of the candidate metrics to be selected to be written back into the memory means along with a successor B-matrix, U-vector and path history. The successor B-matrices, U-vectors and path history are then updated using corresponding values associated with the best predecessor and one of numerical sample values.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/305,727 | 1994-09-14 | ||
| US08/305,727 US5557645A (en) | 1994-09-14 | 1994-09-14 | Channel-independent equalizer device |
| PCT/US1995/011708 WO1996008903A1 (en) | 1994-09-14 | 1995-09-12 | Blind equalizing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2199709A1 true CA2199709A1 (en) | 1996-03-21 |
| CA2199709C CA2199709C (en) | 2005-11-15 |
Family
ID=35530892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002199709A Expired - Fee Related CA2199709C (en) | 1994-09-14 | 1995-09-12 | Channel-independent equalizer device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2199709C (en) |
-
1995
- 1995-09-12 CA CA002199709A patent/CA2199709C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2199709C (en) | 2005-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MX9701907A (en) | Blind equalizing apparatus. | |
| ATE213372T1 (en) | BIDIRECTIONALLY WORKING METHOD FOR DEMODULATION AND DEMODULATOR | |
| AU2385100A (en) | Reduced complexity demodulator for multi-bit symbols | |
| US3761818A (en) | Multilevel signal transmission system | |
| CA2213855A1 (en) | Slope, drift and offset compensation in zero-if receivers | |
| DE69329893D1 (en) | Method and device for compensating for multipath fading and single-wave interference in a radio signal | |
| NO20021002L (en) | Registration of frames without content (zero-rate frames) in a communication system | |
| CA2189121A1 (en) | Diversity receiver for signals with multipath time dispersion | |
| EP0844758A3 (en) | Non-equalized digital receiver using block decoding with erasure and error correction | |
| KR960705415A (en) | A method and apparatus for identifying a coded communication signal | |
| WO1996001012B1 (en) | A method and apparatus for identifying a coded communication signal | |
| EP0881796A3 (en) | Radio receiver performing simultaneous equalisation and error correction decoding | |
| SE9202598L (en) | TIME SYNCHRONIZATION OF A RECEIVER IN A DIGITAL RADIO PHONE SYSTEM | |
| AU1934000A (en) | Synchronization tracking method | |
| DE60132561D1 (en) | METHOD AND DEVICE FOR CHANNEL CHECKING | |
| CA2182835A1 (en) | Digital radiocommunication receiver | |
| EP0963056A3 (en) | Reception apparatus for multipath signals in DS-CDMA | |
| Moon et al. | ML frame synchronization for the Gaussian channel with ISI | |
| CA2199709A1 (en) | Channel-independent equalizer device | |
| DE69217518T2 (en) | Iterative method for reducing neighboring symbol interference, as well as corresponding receiving device and application | |
| WO2001010039A3 (en) | Method for generating reliability information for the decoding channel of a radio receiver and corresponding radio receiver | |
| CA2474897A1 (en) | Gaussian fsk modulation with more than two modulation states | |
| FI951674A0 (en) | A reception processor device specifically for a digital mobile communication system | |
| WO1997016909A3 (en) | Detection of multitone signals | |
| WO2001095508A3 (en) | Apparatus and method for pulse position modulation in an impulse radio communications system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150914 |