JPS6087549A - Detector of quality of transmission line - Google Patents
Detector of quality of transmission lineInfo
- Publication number
- JPS6087549A JPS6087549A JP58195575A JP19557583A JPS6087549A JP S6087549 A JPS6087549 A JP S6087549A JP 58195575 A JP58195575 A JP 58195575A JP 19557583 A JP19557583 A JP 19557583A JP S6087549 A JPS6087549 A JP S6087549A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sampling
- distortion
- transmission line
- waveform
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Dc Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、伝送路の品質を連続的に検出する伝送路品質
検出装置に関し、伝送路に混入する雑音が重畳された、
正弦波信号のサンプリング誤・ノド誤り、及びサンプリ
ング誤り検出から副次的に検出きれる振幅性の歪2位相
性の歪を高精度かつ詳細に測定する事により伝送路の品
質を定量的に検出する伝送路品質検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transmission path quality detection device that continuously detects the quality of a transmission path.
Quantitatively detects the quality of the transmission line by measuring sampling errors and node errors of sine wave signals, as well as amplitude distortion and biphasic distortion that can be detected secondary to sampling error detection, with high precision and detail. The present invention relates to a transmission path quality detection device.
従来より伝送路品質検出装置としては、既に種々提案さ
れている。従来方法で特に本発明に関係するものの構成
を第1図に示し又、その動作を各信号の信号波形図を第
2図に示しこの方法を説明する。Conventionally, various transmission path quality detection devices have already been proposed. The structure of a conventional method particularly related to the present invention is shown in FIG. 1, and the operation thereof is shown in a signal waveform diagram of each signal in FIG. 2 to explain this method.
正弦波発振器lから出力される信号aは、伝送路2を通
る際、雑音により歪を受け受信信号すは波形整形回路3
により+側のスライスレベル及び、−(111のスライ
スレベルでそれぞれ立上り及び、立下る波形整形信号C
を出力し排他的論理和回路4に入力する。又、矩形波発
生器5は信号Cと位相を同期させた信号aと同一周波数
の基準波形信号dを発生ずる。信号dに同期料た信号f
をクロック供給回路7に入力し、信号、1;aのN倍の
周波数に逓倍され標本他用クロ・ツク信4gを発生ずる
。排他的論理和回路4では、信号Cと信号dとの排他的
論理和をとり信4JOを出力する。論理積回路6でば、
信号Cと信号gとの論理積をとりエレメント誤り信号1
1を出力する。リセット制御回路9は信号gにより所定
の検出時間に応じてプリセント計数回路8ヘリセット信
号iを出力する。信号に+はプリセット計数回路8によ
って計数されプリセット値を越えた場合に品質規準低下
信号jを出力する。When the signal a output from the sine wave oscillator l passes through the transmission line 2, it is distorted by noise and the received signal or waveform shaping circuit 3
The waveform shaped signal C rises and falls at the + side slice level and -(111 slice level, respectively).
is output and input to the exclusive OR circuit 4. Further, the rectangular wave generator 5 generates a reference waveform signal d having the same frequency as the signal a whose phase is synchronized with the signal C. Signal f synchronized with signal d
is input to the clock supply circuit 7, and the frequency of the signal 1;a is multiplied by N times to generate a sample clock signal 4g. The exclusive OR circuit 4 takes the exclusive OR of the signal C and the signal d and outputs a signal 4JO. In the AND circuit 6,
Performs the logical product of signal C and signal g to generate element error signal 1
Outputs 1. The reset control circuit 9 outputs a reset signal i to the precent counting circuit 8 according to a predetermined detection time using the signal g. The signal + is counted by a preset counting circuit 8 and outputs a quality standard deterioration signal j when the preset value is exceeded.
従来の伝送路品質検出装置は、以上の様な構成になって
いる為比較的回路構成は簡単であるが、受信信号のスラ
イスレベルにおりる立上り、立下り点が基準波形の立上
り、立下り点とのタイミングが合っている時、+側スラ
イスレベル、又は、−側スライスレベルを越えてからの
同極性雑音による受信信号の歪は、検出されないし、異
極性雑音による歪も一側スライスレベル又は+側スライ
スレベルを越えなければ検出されない。例えば、第3図
の@、■、■、■点の様に波形整形信号の+側スライス
レベルにおける立上り点と、−側スライスレベルの立下
り点、又、−側スライスレベルの立下り点と、+側スラ
イスレベルの立上り点の間での受信信号歪は、はとんど
検出されないという欠点があり、従来方式において検出
精度をあげるには、送出信号の周波数を高くしなければ
ならず、このためには、伝送路の品質を検出する帯域を
広くとらなければならないという欠点があった。Conventional transmission line quality detection devices have a relatively simple circuit configuration as described above, but the rising and falling points at the slice level of the received signal are the same as the rising and falling points of the reference waveform. When the timing is right with the point, distortion of the received signal due to same polarity noise after exceeding the + side slice level or - side slice level will not be detected, and distortion due to different polarity noise will also be at the one side slice level. Otherwise, it will not be detected unless it exceeds the + side slice level. For example, as shown in points @, ■, ■, ■ in Figure 3, the rising point of the waveform shaping signal at the + side slice level, the falling point of the - side slice level, and the falling point of the - side slice level. , the received signal distortion between the rising points of the + side slice level has the disadvantage that it is rarely detected, and in order to improve the detection accuracy in the conventional method, the frequency of the transmitted signal must be increased. This has the disadvantage that a wide band must be used to detect the quality of the transmission path.
本発明は、送出信号の周波数を高くすることなく、信号
の歪を精度良く検出するとともに一信号の歪を振幅性歪
9位相性歪とて歪の要因を判別する事が可能であり回線
が多重化された伝送路の特定回線の品質を検出すること
によってその伝送路における他の回線品質を代表し、検
出することができる伝送路品質検出装置を提供するもの
である。The present invention can accurately detect signal distortion without increasing the frequency of the transmitted signal, and can identify the cause of distortion by identifying the distortion of one signal as amplitude distortion 9 phase distortion. The present invention provides a transmission line quality detection device that can represent and detect the quality of other lines on a multiplexed transmission line by detecting the quality of a specific line on that transmission line.
本発明では、伝送路に混入する雑音が重畳された信号か
ら純粋に歪成分をとり出しこれを伝送路の品質として定
量的に検出するのに正弦波信号を伝送路に送出し、歪を
もった受信信号をそのまま標本化した受信波標本化信号
と受信信号から再生。In the present invention, a sine wave signal is sent to the transmission path to extract pure distortion components from a signal superimposed with noise that enters the transmission path, and quantitatively detect this as the quality of the transmission path. The received signal is sampled as it is and is reproduced from the received wave sampled signal and the received signal.
同期した基準信号を発生し標本化した基準波標本化信号
とを各サンプリング周期毎に比較を行ない歪成分を差分
標本値としCとり出し、これを任意のスライスレベルで
スライスする事によって振幅性歪2位相性歪としてそれ
ぞれ01数し一定数以上の時、誤りとして検出する。又
、それぞれの誤りの論理和をとりサンプリングビット誤
りを41数し一定数以上の場合受信信号の波形誤りとし
検出することによって伝送路品質を検出するようにした
ものである。A synchronized reference signal is generated and sampled, and the reference wave sampling signal is compared at each sampling period, and the distortion component is extracted as a differential sample value C. By slicing this at an arbitrary slice level, amplitude distortion can be calculated. When each number is 01 as biphasic distortion and exceeds a certain number, it is detected as an error. In addition, the quality of the transmission path is detected by calculating the logical sum of each error, counting the number of sampling bit errors to 41, and detecting the error as a waveform error in the received signal if the number exceeds a certain number.
この発明による伝送路品質検出装置の一実施例の構成を
第4図に示し又、その動作を示す各信号の信号波形図を
第5図に示し、説明する。The configuration of an embodiment of the transmission path quality detection device according to the present invention is shown in FIG. 4, and a signal waveform diagram of each signal showing its operation is shown in FIG. 5, and will be explained.
充分に安定した振幅及び周期の正弦波を発生ずる正弦波
発振器1から送出した正弦波信号aは、伝送路2を通過
する際に各種の雑音、静的伝送路特性1時々断等の影響
を受け歪む。この歪んだ信号、受信信号すをある程度の
時定数をもった自動位相制御回路IOに入力し、位相制
御信号Cを出力する。位相同期発振器11は、位相制御
信号Cにより受信信号すと同位相で一定振幅の基準信号
dを出力する。基準信号dを周波数逓倍回路12によっ
て基準信号dの整数倍の周波数をもつ信号eとし、更に
矩形波発生器13よって矩形波のサンプリングクロック
信号fを出力する。A sine wave signal a sent from a sine wave oscillator 1 that generates a sine wave with sufficiently stable amplitude and period is susceptible to the effects of various noises and occasional breaks in the static transmission line characteristics 1 when passing through the transmission line 2. Distorted reception. This distorted signal, the received signal, is input to an automatic phase control circuit IO having a certain time constant, and a phase control signal C is output. The phase synchronized oscillator 11 outputs a reference signal d having the same phase and constant amplitude as the received signal according to the phase control signal C. A frequency multiplier 12 converts the reference signal d into a signal e having a frequency that is an integral multiple of the reference signal d, and a rectangular wave generator 13 outputs a rectangular sampling clock signal f.
伝送路において歪を受けた受信信号すば、標本化回路1
4Aに入力し、サンプリングクロック信号fのサンプリ
ング174期で標本化され、受信波標本化信号gを出力
する。又、受(ii信〜J−から同期。Received signal distorted in transmission path, sampling circuit 1
4A, is sampled at the 174th sampling period of the sampling clock signal f, and outputs a received wave sampled signal g. Also, synchronized from receiving (ii communication ~ J-).
再生した基準信号dを標本化回路14Bに入力しサンプ
リングクロック信号fのザンプリング周期で標本化し受
信波標本化信号りを出力する。The reproduced reference signal d is input to the sampling circuit 14B, where it is sampled at the sampling period of the sampling clock signal f, and a received wave sampling signal is output.
減算回路15では、受信波標本化信号から基準波標本化
信号をサンプリング周期毎に減算し、差分標本値iを出
力する。差分標本値iは、スレッショルドレベル検出器
16八で所定のレベルでスライスレスレソシジルドレベ
ルを越えるものヲ振幅性歪成分信号lとして出力する。The subtraction circuit 15 subtracts the reference wave sampling signal from the received wave sampling signal every sampling period, and outputs a difference sample value i. The difference sample value i is output by a threshold level detector 168 as an amplitude distortion component signal l if it exceeds the sliceless residual level at a predetermined level.
振幅性歪成分信号lはプリセント2段計数回路20Cに
よって計数され一定数以上の場合に受信信号すの振幅性
歪による誤りとし一定時間11数し振幅性正誤り出力信
号rを出力する。ここでの一定時間は、サンプリングク
ロック信号fをりし1ツクとするりセント制御回路19
のリセット信6. oが出方される周期よる。以下の一
定時間はこれによる。The amplitude distortion component signal l is counted by a precent two-stage counting circuit 20C, and if it exceeds a predetermined number, it is determined that the received signal is in error due to amplitude distortion. Here, for a certain period of time, the sampling clock signal
Reset signal 6. It depends on the period in which o appears. The following fixed time is based on this.
一方、受信波標本化信号は、スレソショルドレベ、小検
出W 16 Cにより、スレソショルドレベル検出器1
6Aのスレッショルドレベルよりも低いレベルでスライ
スし、スレッショルトルベルを越えるものについて受信
波位相要素信号kを出力する。又、基準波標本化信号り
ば、スレソショルドレベル検出器16Bにより、スレソ
ショルドレベル検出器16Cと同じレベルでスライスし
スレッショルドレベルを越えるものについて基準波位相
要素信号jを出力する。排他的論理和回路17では、受
信波位相要素信号jと基準波位相要素信号にとをサンプ
リングクロック信号fと同し周期で排他的論理和をとり
位相性歪成分信号mとして出力する。位相性歪成分信号
mは、プリセット2段計数回路20Bによって計数され
、一定数以上の場合に受信信号すの位相性歪による誤り
とし、一定時間計数し振幅性正誤り信号qを出力する。On the other hand, the received wave sampling signal is detected by the threshold level detector 1 due to the threshold level and small detection W 16C.
Slices are made at a level lower than the threshold level of 6A, and a received wave phase element signal k is output for those exceeding the threshold level. Further, the reference wave sampling signal is sliced by the threshold level detector 16B at the same level as the threshold level detector 16C, and a reference wave phase element signal j is output for those exceeding the threshold level. The exclusive OR circuit 17 performs an exclusive OR operation on the received wave phase element signal j and the reference wave phase element signal at the same period as the sampling clock signal f, and outputs the result as a phase distortion component signal m. The phase distortion component signal m is counted by a preset two-stage counting circuit 20B, and if it exceeds a certain number, it is determined that an error is due to phase distortion of the received signal, and after counting for a certain period of time, an amplitude correct error signal q is output.
次に、論理和回路18では、振幅性歪成分信号lと位相
性歪成分信号mとの論理和をとり波形歪成分信号nを出
力する。波形歪成分信号nは、プリセット2段n1数回
路20Aによって計数され一定数以上の場合に受信信号
すの波形歪による誤りとし一定時間11数し、波形誤り
Gj ”jpを出力する。Next, the OR circuit 18 performs the logical sum of the amplitude distortion component signal l and the phase distortion component signal m, and outputs a waveform distortion component signal n. The waveform distortion component signal n is counted by a preset two-stage n1 counting circuit 20A, and if it is greater than a certain number, it is determined that the error is due to waveform distortion of the received signal, and the waveform error component signal n is multiplied for a certain period of time, and a waveform error Gj "jp is output.
以上の実施例のように、本発明によれば伝送路で歪を受
けた受信波形及び基準波形そのものを標本化することか
ら本装置の検出性filは、従来装置のように、受信波
形を最初から整形する事により多くの歪成分をマスク・
Vず、送信信号の周波数によらずに、標本化周期による
為、本実施例と従来装置とでは、送信信置波数が同一で
あるならば、前者の方が高信頼かつ1「11精度な検出
ができる利点がある。As in the above embodiments, according to the present invention, the received waveform distorted in the transmission path and the reference waveform themselves are sampled. Many distortion components can be masked by shaping the
However, since it depends on the sampling period and not on the frequency of the transmitted signal, if the transmitting wave number is the same between this embodiment and the conventional device, the former has higher reliability and 1"11 accuracy. It has the advantage of being detectable.
さらに、本実施例では、伝送1−δの品質を波形誤りと
して検出するプロセスにおいて振幅性正誤りと位相性正
誤りとにそれぞれ分It’ll L、て出力が出来る為
、伝送路の品質をよりii’(’ tlllに検出する
事が可能である。Furthermore, in this embodiment, in the process of detecting the quality of transmission 1-δ as a waveform error, it is possible to output the amplitude correct error and the phase correct error by It'll L, respectively, so the quality of the transmission path can be Therefore, it is possible to detect ii'('tllll).
第1図は、従来の伝送路品!JfL検出装置構成図。
第2図は、従来の伝送路品質検出装置信号波形図。
第3図は、従来装置の問題点を示す図、第4図は、本発
明の一実施例の伝送路品質検出装置構成図。
第5図は、本発明の一実施例の伝送路節5!!IX検出
装置の信号波形図である。
図中、l−正弦波発振器、2−伝送路、3−波形整形回
路、4−排他的論理和回路、5−矩形波発生器、6−i
i19i理積回路、7−クロック供結回路。
8−プリセット計数回路、9−リセソ)・制御回路。
10−自動位相制御回路、11−位相同期発振器。
12−周波数逓倍回路、1.3−知形波発生器、14A
、1413,14C−標本化回路、15−減算回路、1
6A、1.613,16C−スレソショルトルベル検出
器、17−排他的論理和回路、18−論理和回路、19
−リセット1lill i:tll 、20八、20B
、20C−プリセット2段計数回路。
第2口
築3已
(鳴 ) Q) (木 ′−9J
火 ・) ミ にFigure 1 shows a conventional transmission line product! A configuration diagram of a JfL detection device. FIG. 2 is a signal waveform diagram of a conventional transmission path quality detection device. FIG. 3 is a diagram showing problems with a conventional device, and FIG. 4 is a configuration diagram of a transmission path quality detection device according to an embodiment of the present invention. FIG. 5 shows transmission line node 5! of an embodiment of the present invention. ! FIG. 3 is a signal waveform diagram of the IX detection device. In the figure, l - sine wave oscillator, 2 - transmission line, 3 - waveform shaping circuit, 4 - exclusive OR circuit, 5 - square wave generator, 6 - i
i19i product circuit, 7-clock connection circuit. 8-preset counting circuit, 9-reset control circuit. 10- automatic phase control circuit, 11- phase synchronized oscillator. 12-frequency multiplier circuit, 1.3- intelligent wave generator, 14A
, 1413, 14C-sampling circuit, 15-subtraction circuit, 1
6A, 1.613, 16C-threshold torque detector, 17-exclusive OR circuit, 18-OR circuit, 19
-Reset 1lill i:tll, 208, 20B
, 20C-preset two-stage counting circuit. 2nd building 3rd floor Q) (Thursday - 9J Tuesday ・) Mi ni
Claims (1)
する手段と、該伝送路を介して該正弦波信号を受信する
手段と、受信した信号を信号周波数よりも高い周波数で
サンプリングし受信波標本化信号を発生ずる手段と、受
信した信号と位相同期した基準信号を発生ずる手段と、
該基準信号を受信信号のサンプリング周波′数と同□−
周波数でサンプリングし基準波標本化信号を発41三す
る手段と、基準波標本化信号から受信波標本化信号を各
サンプリング周期毎に減算しその差分を取り出す手段と
、差分を所定のレベルでスライスし7振幅性の歪を取り
出す手段と、振幅性の歪を計数し一定数以上の場合に受
信信号の振幅性歪による誤りとして出力する手段と、振
幅性歪による誤りを一定時間計数し出力した後リセット
する手段と、基準波標本化信号と受信波標本化信号をそ
れぞれ前記のスライスレベルよりも低いレベルでそれぞ
れをスライスし発生した信号の排他的論理和をとること
により位相性の歪を取り出す手段と、位相性の歪を計数
し一定数以上の場合に受信信号の位相性歪による誤りと
して出力する手段と、位相性歪による誤りを一定時間計
数し出力した後リセ・ノドする手段と、振幅性の歪と位
相性の歪の論理和をとり波形歪サンプリングビット誤り
を計数し一定数以上の場合に受信信号の波形誤りとして
出力する手段と、波形誤りを一定時間計数し出力した後
リセットする手段とを備えて成る事を特徴とする伝送路
品質検出装置。means for transmitting a sine wave signal with stable amplitude and period to a transmission line; means for receiving the sine wave signal via the transmission line; and means for sampling the received signal at a frequency higher than the signal frequency to generate a received wave means for generating a sampling signal; means for generating a reference signal phase-synchronized with the received signal;
The reference signal is the same as the sampling frequency of the received signal □−
means for sampling at a frequency and generating a reference wave sampling signal, means for subtracting the received wave sampling signal from the reference wave sampling signal at each sampling period and extracting the difference, and slicing the difference at a predetermined level. 7 means for extracting amplitude distortion; means for counting amplitude distortion and outputting it as an error due to amplitude distortion of the received signal when the number exceeds a certain number; and means for counting and outputting errors due to amplitude distortion for a certain period of time. The phase distortion is extracted by slicing each of the reference wave sampling signal and the received wave sampling signal at a level lower than the above-mentioned slice level, and calculating the exclusive OR of the generated signals. means for counting the phase distortion and outputting it as an error due to the phase distortion of the received signal when it exceeds a certain number; means for counting the error due to the phase distortion for a certain period of time and resetting after outputting it; Means for calculating the logical sum of amplitude distortion and phase distortion, counting waveform distortion sampling bit errors, and outputting it as a waveform error of the received signal when the number exceeds a certain number, and resetting after counting and outputting the waveform error for a certain period of time. 1. A transmission line quality detection device comprising: means for detecting the quality of a transmission line.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58195575A JPS6087549A (en) | 1983-10-19 | 1983-10-19 | Detector of quality of transmission line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58195575A JPS6087549A (en) | 1983-10-19 | 1983-10-19 | Detector of quality of transmission line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6087549A true JPS6087549A (en) | 1985-05-17 |
JPH0329218B2 JPH0329218B2 (en) | 1991-04-23 |
Family
ID=16343407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58195575A Granted JPS6087549A (en) | 1983-10-19 | 1983-10-19 | Detector of quality of transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6087549A (en) |
-
1983
- 1983-10-19 JP JP58195575A patent/JPS6087549A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0329218B2 (en) | 1991-04-23 |
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