CA1087693A - Frequency domain automatic equalizer utilizing the discrete fourier transform - Google Patents
Frequency domain automatic equalizer utilizing the discrete fourier transformInfo
- Publication number
- CA1087693A CA1087693A CA275,215A CA275215A CA1087693A CA 1087693 A CA1087693 A CA 1087693A CA 275215 A CA275215 A CA 275215A CA 1087693 A CA1087693 A CA 1087693A
- Authority
- CA
- Canada
- Prior art keywords
- sample
- components
- discrete fourier
- fourier transform
- 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.)
- Expired
Links
- 238000005070 sampling Methods 0.000 claims abstract description 49
- 238000012546 transfer Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000012937 correction Methods 0.000 claims description 10
- 238000001228 spectrum Methods 0.000 claims description 10
- ZVQOOHYFBIDMTQ-UHFFFAOYSA-N [methyl(oxido){1-[6-(trifluoromethyl)pyridin-3-yl]ethyl}-lambda(6)-sulfanylidene]cyanamide Chemical compound N#CN=S(C)(=O)C(C)C1=CC=C(C(F)(F)F)N=C1 ZVQOOHYFBIDMTQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000005316 response function Methods 0.000 claims 2
- 230000009466 transformation Effects 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 40
- 239000013598 vector Substances 0.000 description 21
- 230000003595 spectral effect Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 14
- 230000004044 response Effects 0.000 description 13
- 230000000737 periodic effect Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012549 training Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101001078093 Homo sapiens Reticulocalbin-1 Proteins 0.000 description 1
- 101100340610 Mus musculus Igdcc3 gene Proteins 0.000 description 1
- 102100025335 Reticulocalbin-1 Human genes 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- FIVPIPIDMRVLAY-UHFFFAOYSA-N aspergillin Natural products C1C2=CC=CC(O)C2N2C1(SS1)C(=O)N(C)C1(CO)C2=O FIVPIPIDMRVLAY-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- SYOKIDBDQMKNDQ-XWTIBIIYSA-N vildagliptin Chemical compound C1C(O)(C2)CC(C3)CC1CC32NCC(=O)N1CCC[C@H]1C#N SYOKIDBDQMKNDQ-XWTIBIIYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
- H04B3/14—Control of transmission; Equalising characterised by the equalising network used
- H04B3/141—Control of transmission; Equalising characterised by the equalising network used using multiequalisers, e.g. bump, cosine, Bode
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US706,702 | 1976-07-19 | ||
| US05/706,703 US4100604A (en) | 1976-07-19 | 1976-07-19 | Frequency domain automatic equalizer utilizing the discrete Fourier transform |
| US05/706,702 US4106103A (en) | 1976-07-19 | 1976-07-19 | Derivation of discrete Fourier transform components of a time dependent signal |
| US706,703 | 1976-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1087693A true CA1087693A (en) | 1980-10-14 |
Family
ID=27107739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA275,215A Expired CA1087693A (en) | 1976-07-19 | 1977-03-31 | Frequency domain automatic equalizer utilizing the discrete fourier transform |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5325335A (enrdf_load_stackoverflow) |
| CA (1) | CA1087693A (enrdf_load_stackoverflow) |
| DE (1) | DE2729336A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2359546A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1585836A (enrdf_load_stackoverflow) |
| IT (1) | IT1086161B (enrdf_load_stackoverflow) |
| NL (1) | NL7704518A (enrdf_load_stackoverflow) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5888914A (ja) * | 1981-11-20 | 1983-05-27 | Hiroshi Miyagawa | 自動等化器 |
| JPS5888915A (ja) * | 1981-11-20 | 1983-05-27 | Hiroshi Miyagawa | 周波数サンプリング形自動等化器 |
| US4813001A (en) * | 1987-05-29 | 1989-03-14 | Schlumberger Systems, Inc. | AC calibration method and device by determining transfer characteristics |
| CN114372491A (zh) * | 2021-12-31 | 2022-04-19 | 山东科讯信息科技有限公司 | 转动设备的故障识别方法及相关设备 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3292110A (en) * | 1964-09-16 | 1966-12-13 | Bell Telephone Labor Inc | Transversal equalizer for digital transmission systems wherein polarity of time-spaced portions of output signal controls corresponding multiplier setting |
| US3375473A (en) * | 1965-07-15 | 1968-03-26 | Bell Telephone Labor Inc | Automatic equalizer for analog channels having means for comparing two test pulses, one pulse traversing the transmission channel and equalizer |
| US3582879A (en) * | 1969-04-25 | 1971-06-01 | Computer Mode Corp | Communication channel equalization system and equalizer |
| US3614673A (en) * | 1970-05-28 | 1971-10-19 | Bunker Ramo | Technique for utilizing a single pulse to set the gains of a transversal filter |
| US3851162A (en) * | 1973-04-18 | 1974-11-26 | Nasa | Continuous fourier transform method and apparatus |
| US4027257A (en) * | 1976-06-01 | 1977-05-31 | Xerox Corporation | Frequency domain automatic equalizer having logic circuitry |
-
1977
- 1977-03-31 CA CA275,215A patent/CA1087693A/en not_active Expired
- 1977-04-25 NL NL7704518A patent/NL7704518A/xx not_active Application Discontinuation
- 1977-06-29 DE DE19772729336 patent/DE2729336A1/de active Granted
- 1977-07-12 JP JP8349677A patent/JPS5325335A/ja active Pending
- 1977-07-18 GB GB3004777A patent/GB1585836A/en not_active Expired
- 1977-07-18 IT IT2584477A patent/IT1086161B/it active
- 1977-07-19 FR FR7722030A patent/FR2359546A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2359546B1 (enrdf_load_stackoverflow) | 1984-04-27 |
| NL7704518A (nl) | 1978-01-23 |
| DE2729336A1 (de) | 1978-01-26 |
| JPS5325335A (en) | 1978-03-09 |
| FR2359546A1 (fr) | 1978-02-17 |
| IT1086161B (it) | 1985-05-28 |
| DE2729336C2 (enrdf_load_stackoverflow) | 1988-08-11 |
| GB1585836A (en) | 1981-03-11 |
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| US4106103A (en) | Derivation of discrete Fourier transform components of a time dependent signal | |
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| US4100604A (en) | Frequency domain automatic equalizer utilizing the discrete Fourier transform | |
| US3614673A (en) | Technique for utilizing a single pulse to set the gains of a transversal filter | |
| JPH02502777A (ja) | 拡散性、直線的又は近似的に直線的チヤネル、例えば無線チヤネルの等化を行なう方法及びこの方法を実施する装置 | |
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| US4789952A (en) | Method and apparatus for digital compensation and digital equalization | |
| KR970017460A (ko) | 통신 채널에 대한 시간 영역 필터 | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |