JPS58131853A - Interference wave eliminating device - Google Patents
Interference wave eliminating deviceInfo
- Publication number
- JPS58131853A JPS58131853A JP1254582A JP1254582A JPS58131853A JP S58131853 A JPS58131853 A JP S58131853A JP 1254582 A JP1254582 A JP 1254582A JP 1254582 A JP1254582 A JP 1254582A JP S58131853 A JPS58131853 A JP S58131853A
- Authority
- JP
- Japan
- Prior art keywords
- interference wave
- phase
- input signal
- output
- interference
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Noise Elimination (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は干渉波除去装置、特に他ルートからFM干渉波
が存在するマイクロ波デジタル伝送システムに用いられ
る干渉波除去装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interference wave removal device, and particularly to an interference wave removal device used in a microwave digital transmission system in which FM interference waves exist from other routes.
近年マイクロ波デジタル伝送システムの商用化が進み将
来マイクロ波FM伝送シヌテムにとって替ろうとしてい
るが、その過渡期においては同一周波数帯域に2つの伝
送システムが共存する場合が生ずる。その場合2両シヌ
テム間の相互干渉が問題となる。その1例としてはデジ
タル伝送システムが他ルートのFM伝送シヌテムから1
つないし複数のFM干渉をうける場合がある。このよう
な条件下において、デジタル伝送システムをFM伝送シ
ステムと共存させるためには、デジタル伝送システムに
FM干渉波除去装置を付加してFM干渉波の影響な無視
できるシステムを構成する必要がある。In recent years, microwave digital transmission systems have been commercialized and are expected to replace microwave FM transmission systems in the future, but during the transition period, two transmission systems may coexist in the same frequency band. In that case, mutual interference between the two synutems becomes a problem. One example is when a digital transmission system is connected to an FM transmission system using another route.
There may be cases where multiple FM interference occurs. Under such conditions, in order for a digital transmission system to coexist with an FM transmission system, it is necessary to add an FM interference wave removal device to the digital transmission system to configure a system in which the influence of FM interference waves can be ignored.
従って本発明の目的は前述のようなFM干渉波を除去す
る装置を提供するにある。Therefore, an object of the present invention is to provide a device for removing the above-mentioned FM interference waves.
本発明によれば、マイクロ波デジタル伝送システムにお
いて、干渉波の共存する入力信号およびこの入力信号か
ら狭帯域フィルタを通して得られる干渉波信号のうちの
いずれか1方の信号を、制御信号によって振幅および位
相を制御する制御手段と、前記入力信号から前記制御手
段の出力を減算する減算手段と、前記いずれか一方の信
号および前記減算手段の出力を直交乗算することによっ
て前記制御信号を得る直交乗算手段とを具備することを
特徴とする干渉波除去装置が得られる。According to the present invention, in a microwave digital transmission system, either an input signal in which interference waves coexist or an interference wave signal obtained from this input signal through a narrow band filter is controlled by a control signal to control the amplitude and the interference wave signal. control means for controlling the phase; subtraction means for subtracting the output of the control means from the input signal; and orthogonal multiplication means for obtaining the control signal by orthogonally multiplying either one of the signals and the output of the subtraction means. There is obtained an interference wave removal device characterized by comprising the following.
以下図面を用いて詳細に説明する。This will be explained in detail below using the drawings.
第1図は本発明による干渉波除去装置の一実施例の構成
を示すブロック図であl)、Fl、F2なるキャリア成
分を有するFM干渉波が存在する場合を示している。は
じめに構成そのものについて説明すると、■と2は狭帯
域フィルタ、3と4は可変減衰器、5と6は可変位相器
、6Aは3〜6を合せたもので振幅位相制御回路、7は
合成器、8は減算器、9は制御信号発生回路、10〜1
3は乗算器、14と15は帯域ろ波器、16と17はπ
/2移相器をそれぞれあられしている。FIG. 1 is a block diagram showing the configuration of an embodiment of the interference wave removal device according to the present invention.1) It shows the case where there is an FM interference wave having carrier components Fl and F2. First, to explain the configuration itself, ■ and 2 are narrowband filters, 3 and 4 are variable attenuators, 5 and 6 are variable phase shifters, 6A is a combination of 3 to 6 and is an amplitude phase control circuit, and 7 is a synthesizer. , 8 is a subtracter, 9 is a control signal generation circuit, 10 to 1
3 is a multiplier, 14 and 15 are bandpass filters, 16 and 17 are π
/2 phase shifters respectively.
次に上記のよう々構成を持つ装置の動作を説明する。入
力信号IFXNに含まれるFl、F2 なるキャリア
成分を有するFM干渉波は、狭帯域フィルタ1.2によ
って抽出され、その出力は可変減衰器3.4および可変
位相器5,6の形成する振幅位相制御回路6Aによシ後
述のように制御され2合成器7で合成されて減算器8に
供給される。この減算器8では入力信号1F1Nと合成
器7出力との関係を逆相で且つ同レベルという相対関係
で両者を合成する。その結果減算器8出力では入力信号
に含まれたFl、F2なる干渉波は消去され主信号成分
のみとなる。減算器8は上記の相対条件が満足されれば
加算器でもよい。上述した減算器8での相対関係は2次
に説明する制御信号によって制御される可変減衰器およ
び可変位相器3〜6によって保持されるが、その制御信
号は制御信号発生回路9にて得られる。Next, the operation of the apparatus configured as described above will be explained. The FM interference wave having carrier components Fl and F2 contained in the input signal IFXN is extracted by a narrow band filter 1.2, and its output is outputted from an amplitude phase difference formed by a variable attenuator 3.4 and variable phase shifters 5 and 6. The signals are controlled by the control circuit 6A as described later, are combined by the two-combiner 7, and are supplied to the subtracter 8. This subtracter 8 combines the input signal 1F1N and the output of the combiner 7 in a relative relationship such that they are in opposite phase and at the same level. As a result, at the output of the subtracter 8, the interference waves Fl and F2 included in the input signal are eliminated, leaving only the main signal component. The subtracter 8 may be an adder if the above relative conditions are satisfied. The relative relationship in the subtracter 8 described above is maintained by the variable attenuators and variable phase shifters 3 to 6 that are controlled by control signals that will be explained next, but the control signals are obtained by the control signal generation circuit 9. .
第2図は減算器8出力に現われる残留干渉波をベクトル
であられした図であり、(a)は位相に関するもの、(
b)は振幅に関するものをあられしている。FIG. 2 is a vector diagram of the residual interference wave appearing at the output of the subtracter 8, where (a) is related to the phase, (
b) shows things related to amplitude.
入力信号工F、Nに含まれる干渉波をB、 7出力の
干渉波をAとすると、定常時には残留は0となるが。If the interference waves included in the input signals F and N are B, and the interference wave of the 7 output is A, then the residual will be 0 in steady state.
残留ベクトルは(a)に示すようにそれぞれΔE1.Δ
E2のとき、残留ベクトルは(b)に示すようにそれぞ
れΔe 、Δe2と力る。As shown in (a), the residual vectors are ΔE1. Δ
When E2, the residual vectors are Δe and Δe2, respectively, as shown in (b).
上記のように減算器8での相対関係において。In the relative relationship in the subtractor 8 as described above.
位相ずれの場合Aに対してπ/2あるいは3π/2の残
留干渉波が生じ、振幅ずれの場合同相あるいは逆相の残
留干渉波が生ずる。よって可変減衰器および可変位相器
3〜6の制御信号は次の操作で得られる。すなわち可変
減衰器3,40制御信号である振幅制御信号は、狭帯域
フィルター、2の出力をπ/2ラジアン(7r/2移相
器16.17)すらる残留干渉波とを乗算することによ
って得られる。In the case of a phase shift, a residual interference wave of π/2 or 3π/2 is generated with respect to A, and in the case of an amplitude shift, a residual interference wave of in-phase or anti-phase is generated. Therefore, control signals for the variable attenuators and variable phase shifters 3 to 6 can be obtained by the following operations. That is, the amplitude control signal, which is the control signal for the variable attenuators 3 and 40, is obtained by multiplying the output of the narrow band filter 2 by the residual interference wave passing through π/2 radians (7r/2 phase shifter 16.17). can get.
また可変位相器5,6の制御信号である位相制御信号は
狭帯域フィルター、2の出力の出力Aと相干渉波とを乗
算することによって得られる。帯域ろ波器14.15は
乗算器10.13の入力いをある程度改善して、その動
作を安定にするために用いられる。Further, a phase control signal which is a control signal for the variable phase shifters 5 and 6 is obtained by multiplying the output A of the narrow band filter 2 by the phase interference wave. Bandpass filters 14.15 are used to improve the input to multiplier 10.13 to some extent and stabilize its operation.
以上の説明のように、可変位相器6と可変減衰器4の制
御信号は、減算器8と狭帯域フィルタ2の出力を入力信
号とする乗算器10.11とπ/2移相器16から構成
される直交乗算器(9の半分)によって得ることができ
る。同様に可変減衰器3と可変位相器5の制御信号は減
算器8と狭帯域フィルタ1の出力を入力信号とする乗算
器12.13および帯域フィルタ15から構成される直
交乗算器(9の他の半分)によって得ることができる。As explained above, the control signals for the variable phase shifter 6 and the variable attenuator 4 are obtained from the multiplier 10.11 and the π/2 phase shifter 16, which use the outputs of the subtracter 8 and narrowband filter 2 as input signals. can be obtained by an orthogonal multiplier (9 halves) configured. Similarly, the control signals for the variable attenuator 3 and the variable phase shifter 5 are controlled by quadrature multipliers (other than 9), which are composed of multipliers 12, 13 and bandpass filters 15, which use the outputs of the subtracter 8 and the narrowband filter 1 as input signals. can be obtained by half of
直交乗算器として一般によく知られているものには4相
位相検波器がある。A generally well-known quadrature multiplier is a four-phase phase detector.
上記の動作において、各制御信号はいずれも極めて帯域
の狭い信号となっている。したがって狭帯域フィルタ1
と2は必須のものではない。In the above operation, each control signal is a signal with an extremely narrow band. Therefore narrowband filter 1
and 2 are not required.
以上説明したように2本発明による第1図の実施例によ
れば、 Fl、 F2々る2つのFM干渉波の消去を
行うことができる。そしてこの干渉波消去回路は復調回
路出力の信号を使用することなくすべてIF帯にて処理
できる。これによって本発明による干渉波除去装置は単
独で使用できるため、主信号の種別に対して適用が限定
されない利点を有す。As explained above, according to the embodiment of FIG. 1 according to the present invention, two FM interference waves, Fl and F2, can be canceled. This interference wave cancellation circuit can process all signals in the IF band without using the signals output from the demodulation circuit. As a result, the interference wave removal device according to the present invention can be used alone, and has the advantage that its application is not limited to the type of main signal.
又干渉波の種別については、キャリア成分が支配的な干
渉波であればすべて可能であり、更に干渉波の数につい
ても制限はない。Regarding the type of interference waves, any interference wave in which the carrier component is dominant is possible, and there is no limit to the number of interference waves.
第1図は本発明による干渉波除去装置の一実施例の構成
をブロックであられした図、第2図は第1図の装置の減
算器出力である残留干渉波のベクトル図であって、(a
)は位相に関するもの、(b)は振幅に関するものを示
している。
記号の説明:1,2は狭帯域フィルタ、3,4は可変減
衰器、5,6は可変位相器、7は合成器。
8は減算器、9は制御信号発生回路、10〜13は乗算
器、14.15は帯域ろ波器、16.17はπ/2移相
器をそれぞれあられしている。
(7)
馬2図
(OL)
ア
Cb)
了FIG. 1 is a block diagram showing the configuration of an embodiment of the interference wave removal device according to the present invention, and FIG. 2 is a vector diagram of the residual interference wave that is the output of the subtracter of the device shown in FIG. a
) indicates the phase, and (b) indicates the amplitude. Explanation of symbols: 1 and 2 are narrowband filters, 3 and 4 are variable attenuators, 5 and 6 are variable phase shifters, and 7 is a synthesizer. 8 is a subtracter, 9 is a control signal generation circuit, 10 to 13 are multipliers, 14.15 is a bandpass filter, and 16.17 is a π/2 phase shifter. (7) Horse figure 2 (OL) ACb) Completed
Claims (1)
渉波の共存する入力信号およびこの入力信号から狭帯域
フィルタを通して得られる干渉波信号のうちのいずれか
1方の信号を、制御信号によって振幅および位相を制御
する制御手段と、前記入力信号から前記制御手段の出力
を減算する減算手段と、前記いずれか一方の信号および
前記減算手段の出力を直交乗算することによって前記制
御信号を得る直交乗算手段と、を具備することを特徴と
する干渉波除去装置。1. In a microwave digital transmission system, the amplitude and phase of either an input signal in which interference waves coexist or an interference wave signal obtained from this input signal through a narrow band filter are controlled by a control signal. A control means, a subtraction means for subtracting an output of the control means from the input signal, and an orthogonal multiplication means for obtaining the control signal by orthogonally multiplying one of the signals and the output of the subtraction means. An interference wave removal device characterized by:
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1254582A JPS58131853A (en) | 1982-01-30 | 1982-01-30 | Interference wave eliminating device |
US06/460,961 US4501004A (en) | 1982-01-30 | 1983-01-25 | Device for eliminating FM or like interference from a digital microwave signal |
EP83100766A EP0085403B1 (en) | 1982-01-30 | 1983-01-27 | Device for eliminating fm or like interference from a digital microwave signal |
DE8383100766T DE3378880D1 (en) | 1982-01-30 | 1983-01-27 | Device for eliminating fm or like interference from a digital microwave signal |
CA000420419A CA1200850A (en) | 1982-01-30 | 1983-01-28 | Device for eliminating fm or like interference from a digital microwave signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1254582A JPS58131853A (en) | 1982-01-30 | 1982-01-30 | Interference wave eliminating device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58131853A true JPS58131853A (en) | 1983-08-05 |
JPS6365183B2 JPS6365183B2 (en) | 1988-12-14 |
Family
ID=11808297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1254582A Granted JPS58131853A (en) | 1982-01-30 | 1982-01-30 | Interference wave eliminating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58131853A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61158223A (en) * | 1984-12-28 | 1986-07-17 | Nippon Hoso Kyokai <Nhk> | Disturbance wave eliminator |
US4662471A (en) * | 1985-02-15 | 1987-05-05 | Yamaha Hatsudoki Kabushiki Kaisha | Chain and shaft drive for balloon tired motorcycle |
US4664215A (en) * | 1985-03-04 | 1987-05-12 | Yamaha Hatsudoki Kabushiki Kaisha | Shaft drive for balloon tired motorcycle |
US4667762A (en) * | 1985-02-15 | 1987-05-26 | Yamaha Hatsudoki Kabushiki Kaisha | Drive mechanism for balloon tired motorcycle |
US4953656A (en) * | 1985-03-04 | 1990-09-04 | Yamaha Hatsudoki Kabushuki Kaisha | Offset drive for balloon tired motorcycle |
JP2012191357A (en) * | 2011-03-09 | 2012-10-04 | Asahi Kasei Electronics Co Ltd | Phase deviation correction circuit, phase variable amplifier circuit, phase deviation correction method, and phase adjustment method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03106577U (en) * | 1990-02-19 | 1991-11-05 |
-
1982
- 1982-01-30 JP JP1254582A patent/JPS58131853A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61158223A (en) * | 1984-12-28 | 1986-07-17 | Nippon Hoso Kyokai <Nhk> | Disturbance wave eliminator |
US4662471A (en) * | 1985-02-15 | 1987-05-05 | Yamaha Hatsudoki Kabushiki Kaisha | Chain and shaft drive for balloon tired motorcycle |
US4667762A (en) * | 1985-02-15 | 1987-05-26 | Yamaha Hatsudoki Kabushiki Kaisha | Drive mechanism for balloon tired motorcycle |
US4664215A (en) * | 1985-03-04 | 1987-05-12 | Yamaha Hatsudoki Kabushiki Kaisha | Shaft drive for balloon tired motorcycle |
US4953656A (en) * | 1985-03-04 | 1990-09-04 | Yamaha Hatsudoki Kabushuki Kaisha | Offset drive for balloon tired motorcycle |
JP2012191357A (en) * | 2011-03-09 | 2012-10-04 | Asahi Kasei Electronics Co Ltd | Phase deviation correction circuit, phase variable amplifier circuit, phase deviation correction method, and phase adjustment method |
Also Published As
Publication number | Publication date |
---|---|
JPS6365183B2 (en) | 1988-12-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0185416B1 (en) | Radio receiver/transmitter filters | |
US4318049A (en) | Carrier recovery circuit for use in a multi-level phase shift keying demodulator | |
JPS58131853A (en) | Interference wave eliminating device | |
EP0085403B1 (en) | Device for eliminating fm or like interference from a digital microwave signal | |
US4584712A (en) | Interference signal supressor system | |
US3873931A (en) | FM demodulator circuits | |
US7209721B2 (en) | Single sideband mixer and method of extracting single sideband signal | |
JPH09275425A (en) | Phase modulated signal demodulating method and device for executing the same | |
JPS6277720A (en) | Interference wave eliminating device | |
RU2024199C1 (en) | Adaptive digital corrector | |
JPS6365182B2 (en) | ||
JP3391012B2 (en) | Digital processing quadrature modulation method and quadrature modulator | |
JP2738353B2 (en) | Spectrum suppression method and apparatus | |
JPS5835429B2 (en) | Carrier regeneration circuit | |
KR950003359B1 (en) | Demodulator fit for high speed processing | |
KR20020051547A (en) | An apparatus for deleting a leakage signal of a local oscillation signal | |
JP2705363B2 (en) | Automatic interference canceller | |
SU1261138A1 (en) | Receiver of phase-shift keyed signals | |
US4139823A (en) | Electrical energy transmission network | |
JPS59196655A (en) | Delay detecting circuit | |
RU2205517C1 (en) | Signal demodulator with frequency modulation | |
JPS58131854A (en) | Interference wave extracting device | |
JP2008042576A (en) | Device and method for removing disturbing signal | |
JPS62100035A (en) | Interference wave eliminating equipment | |
JPS61161056A (en) | One frequency repeater |