GB1383286A - Digital transversal filter - Google Patents
Digital transversal filterInfo
- Publication number
- GB1383286A GB1383286A GB3879673A GB3879673A GB1383286A GB 1383286 A GB1383286 A GB 1383286A GB 3879673 A GB3879673 A GB 3879673A GB 3879673 A GB3879673 A GB 3879673A GB 1383286 A GB1383286 A GB 1383286A
- Authority
- GB
- United Kingdom
- Prior art keywords
- delay
- output
- difference
- adder
- signal
- 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
- 230000001934 delay Effects 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/06—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
- H04L25/03133—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a non-recursive structure
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Mathematical Physics (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
1383286 Active filters INTERNATIONAL BUSINESS MACHINE CORP 16 Aug 1973 [23 Aug 1972] 38796/73 Heading H3U A digital filter comprises: a delay 2 of period (2K + 2)T, where K is a positive integer and T is the sampling period, the delay having a tap at an intermediate point defining a delay of (K+1)T; means 4 for summing the input to the delay, the output from the delay and the output from the tap weighted by a factor 2(- 1)<SP>k</SP> in weighting circuit 3; means 5, 6 for providing the difference between the output from summing means 4 and the difference provided an interval T earlier; and means 7, 8 for providing the difference between the output from means 5, 6 and this second difference an interval T earlier. The two signals corresponding to the earlier intervals are derived by delays 6, 8 of T. The output signal, g n+2 , is thus formed as the difference between a signal b n+ 2 fed to the positive input of adder 7, and the signal g n+1 fed to the negative input of adder 7 from the delay 8, that is The quantity b n+2 is similarly derived by delay 6 and adder 5 as where the output from adder 4 is given by the expression S being a sample of the input signal at the time denoted by the subscript.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7230577A FR2197499A5 (en) | 1972-08-23 | 1972-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1383286A true GB1383286A (en) | 1974-02-12 |
Family
ID=9103623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3879673A Expired GB1383286A (en) | 1972-08-23 | 1973-08-16 | Digital transversal filter |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS547430B2 (en) |
| CA (1) | CA992160A (en) |
| DE (1) | DE2339616A1 (en) |
| FR (1) | FR2197499A5 (en) |
| GB (1) | GB1383286A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004034664A3 (en) * | 2002-10-08 | 2004-05-27 | Ma Com Inc | Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing |
| US7298854B2 (en) | 2002-12-04 | 2007-11-20 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4302631A (en) * | 1979-11-28 | 1981-11-24 | International Telephone And Telegraph Corporation | Decimator apparatus for decreasing the word rate of a digital signal of the type employed in digital telephone systems |
| NL8006543A (en) * | 1980-12-02 | 1982-07-01 | Philips Nv | SELF-ADJUSTING FILTER. |
| US5031132A (en) * | 1990-02-27 | 1991-07-09 | Analogic Corporation | Circuit for convolving a set of digital data |
-
1972
- 1972-08-23 FR FR7230577A patent/FR2197499A5/fr not_active Expired
-
1973
- 1973-06-22 CA CA174,774A patent/CA992160A/en not_active Expired
- 1973-07-16 JP JP7937873A patent/JPS547430B2/ja not_active Expired
- 1973-08-04 DE DE19732339616 patent/DE2339616A1/en not_active Withdrawn
- 1973-08-16 GB GB3879673A patent/GB1383286A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004034664A3 (en) * | 2002-10-08 | 2004-05-27 | Ma Com Inc | Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing |
| US7298854B2 (en) | 2002-12-04 | 2007-11-20 | M/A-Com, Inc. | Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CA992160A (en) | 1976-06-29 |
| DE2339616A1 (en) | 1974-03-07 |
| JPS547430B2 (en) | 1979-04-06 |
| JPS4947053A (en) | 1974-05-07 |
| FR2197499A5 (en) | 1974-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |