MY108804A - A method of forming a channel estimate for a time-varying radio channel - Google Patents
A method of forming a channel estimate for a time-varying radio channelInfo
- Publication number
- MY108804A MY108804A MYPI93000286A MYPI19930286A MY108804A MY 108804 A MY108804 A MY 108804A MY PI93000286 A MYPI93000286 A MY PI93000286A MY PI19930286 A MYPI19930286 A MY PI19930286A MY 108804 A MY108804 A MY 108804A
- Authority
- MY
- Malaysia
- Prior art keywords
- channel
- estimate
- channel estimate
- derivative
- aid
- Prior art date
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
RADIO SIGNALS ARE TRANSMITTED OVER A FADING RADIO CHANNEL AND ARE FILTERED AND SAMPLED IN A RECEIVER TO OBTAIN A DIGITAL SIGNAL (Y (N)). A CHANNEL EQUALIZER (5) HAS AN EQUALIZING FILTER (CEST) IN WHICH A CHANNEL ESTIMATE (H (N/N-L)) IS FORMED WITH THE AID OF A KNOW SYNCHRONIZING SEQUENCE. A VITERBI ANALYZER (VIT) DECIDES SYMBOLS (D (N-L) WITH THE AID OF THE CHANNEL ESTIMATE. AN ESTIMATED TIME DERIVATIVE OF THE CHANNEL ESTIMATE (H (H/N-L)) IS FORMED AND ADAPTED WITH THE AID OF THE DECIDED SYMBOLS (D (N-L)). THE CHANNEL ESTIMATE (H (N/N-L)) IS ADAPTED TO THE RADIO CHANNEL BY THE DERIVATIVE ESTIMATE AND THE DECIDED SYMBOLS (D (N-L)). IN THE EVENT OF FADING WITH RAPIDLY VARVING SIGNAL STRENGTH (Y (N)), THE CHANNEL ESTIMATE (H (N/N-L)) IS ADAPTED SLOWLY AND IS PREDICTED MAINLY THROUGH THE DERIVATIVE ESTIMATE WHICH VARIES RELATIVELY EVENLY. THE DIGITAL SIGNAL (Y (N)) IS STORED IN A MEMORY (M) AND AN INITIAL VALUE IS FORMED FOR YHE DERIVATIVE ESTIMATE AS A DIFFERENCE BETWEEN TWO KNOW CHANNEL ESTIMATES DIVIDED BY A TIME THEREBETWEEN. THE KNOW CHANNEL ESTIMATE MAY BELONG TO TWO SEPARATE SYNCHRONIZING SEQUENCES OR MAY BELONG TO ONE SYNCHROZING SEQUENCE AND A FADING TIME POINT IN WHICH THE CHANNEL ESTIMATE HAS ZERO VALUE. (FIGURE 7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI93000286A MY108804A (en) | 1993-02-20 | 1993-02-20 | A method of forming a channel estimate for a time-varying radio channel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MYPI93000286A MY108804A (en) | 1993-02-20 | 1993-02-20 | A method of forming a channel estimate for a time-varying radio channel |
Publications (1)
Publication Number | Publication Date |
---|---|
MY108804A true MY108804A (en) | 1996-11-30 |
Family
ID=79961178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MYPI93000286A MY108804A (en) | 1993-02-20 | 1993-02-20 | A method of forming a channel estimate for a time-varying radio channel |
Country Status (1)
Country | Link |
---|---|
MY (1) | MY108804A (en) |
-
1993
- 1993-02-20 MY MYPI93000286A patent/MY108804A/en unknown
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