JPS63208781A - Waveform shaping circuit - Google Patents
Waveform shaping circuitInfo
- Publication number
- JPS63208781A JPS63208781A JP4189887A JP4189887A JPS63208781A JP S63208781 A JPS63208781 A JP S63208781A JP 4189887 A JP4189887 A JP 4189887A JP 4189887 A JP4189887 A JP 4189887A JP S63208781 A JPS63208781 A JP S63208781A
- Authority
- JP
- Japan
- Prior art keywords
- waveform
- transmission
- transmission output
- output
- modulation
- 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
- 238000007493 shaping process Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 238000012935 Averaging Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 abstract description 2
- 239000000284 extract Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 238000009499 grossing Methods 0.000 description 8
- 230000004044 response Effects 0.000 description 7
- 238000012937 correction Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Amplifiers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は波形整形回路に関し、特に例えばＤＭＥ装匝の
トランスポンダとしての地上局から機上局に対して送信
する波形に含まれる非線形増幅歪を含む各撞歪を除去し
整形する波形整形回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a waveform shaping circuit, and particularly to a waveform shaping circuit that corrects nonlinear amplification distortion contained in a waveform transmitted from a ground station to an airborne station, such as a DME-equipped transponder. The present invention relates to a waveform shaping circuit that removes and shapes the various distortions included.
航法装置としてのＤＭＥ装置はよく知られている。この
ＤＭＥ装置は飛翔する航空機に搭載する機上局から地上
局に対し質問パルスを発射し、これを受けた地上局側で
は応答パルスを発射する。DME devices as navigation devices are well known. This DME device emits an interrogation pulse to a ground station from an onboard station mounted on a flying aircraft, and the ground station, which receives the interrogation pulse, emits a response pulse.
機上局は質問から応答までの時間にもとづいて当該地上
局までの距離を知る。The airborne station learns the distance to the ground station based on the time from inquiry to response.
地上局から発射される送信出力は、機上局からの質問が
ないときでも約１０００ｐｐ／５（ｐｕｌｓｅｐａｉｒ
ｓ ｐｅｒ ５ｅｃｏｎｄ）で出力されるランダムパル
ス、質問パルス到来に対応してこのランダムパルスと入
替って出力される応答パルスのほか地上局の識別パルス
が含まれ、応答パルスを加えた酩パルス数は最小的１０
００、最大約２７００ｐｐ／ｓに達する。The transmission power emitted from the ground station is approximately 1000 pp/5 (pulse pair) even when there are no questions from the airborne station.
In addition to the random pulse that is output at s per 5 seconds), the response pulse that is output in place of the random pulse in response to the arrival of the interrogation pulse, and the identification pulse of the ground station, the number of pulses including the response pulse is minimum 10
00, reaching a maximum of about 2700 pp/s.
上述した送信出力パルスのうち、局識別パルスを除いた
ランダムパルスと質問パルスは互いに１２μｓ離隔した
３、５μｓのパルス幅のものである。Among the above-mentioned transmission output pulses, the random pulses and the interrogation pulses excluding the station identification pulse are separated from each other by 12 μs and have a pulse width of 3.5 μs.
これらツインパルスのうち応答信号は特に機上局の距離
計側で重要である。いずれにせよ、これら送信出力パル
スは、地上局の送信系の変調部でパルスＡＭ変調を受け
た所定の周波数のキャリアが電力増幅され所定のレベル
となってアンテナに印加する形式で発射される。Among these twin pulses, the response signal is particularly important on the distance meter side of the airborne station. In any case, these transmission output pulses are emitted in the form of a carrier of a predetermined frequency that has undergone pulse AM modulation in a modulation section of a transmission system of the ground station, is power amplified to a predetermined level, and is applied to an antenna.
このような送信出力の電力増幅はＣ級増幅で行なわれ、
従って当然のことながらＣ級増幅に伴なう非線形歪が発
生し、距離計測における誤差の要因となるほか、スペク
トルの拡大を招きこれが制限帯域を逸脱して隣接常域に
入りこむようになる。Power amplification of such transmission output is performed by class C amplification,
Therefore, as a matter of course, nonlinear distortion occurs due to class C amplification, which not only causes errors in distance measurement, but also causes spectrum expansion, which deviates from the limited band and enters the adjacent normal range.
ＤＭＥ装置は空港における航空ａ＃Ｉ着陸のための主要
装置のひとつであシ、従ってこの非線形歪は除去する必
要がある。DME equipment is one of the main equipment for aviation a#I landing at airports, so this nonlinear distortion needs to be removed.
しかも近時、高精度Ｄ Ｍ Ｅ （Ｐｒｅｃｉｓｉｏｎ
ＤＭＥ 。Moreover, recently, high-precision DME (Precision
DME.
以後ＤＭＥ／Ｐと略称する）がＭ Ｌ Ｓ （Ｍｉｃｒ
ｏｗａｖｅＬａｎｄｉｎｇ ５ｙｓｔａｎ）の距離系を
惧当する存在としてその運用が予定され、上述した非線
形歪の除去の問題は一層加重しつつある。(hereinafter abbreviated as DME/P) is MLS (Micr
Its operation is planned as a concern for the distance system of owaveLanding (5ystan), and the problem of removing the nonlinear distortion described above is becoming more serious.
ＤＭＥ／Ｐは、従来のＤＭＥ装置の地上局と機上局間の
交信におけるマルチパス（ｍｕｌｔｉ ｐａｔｈ）の影
響の排除を図り、応答パルスの検出をツインパルスの先
行パルスのパルス前縁の低レベル部位を利用して行なう
ものである。DME/P aims to eliminate the influence of multipath in communication between the ground station and the airborne station of conventional DME equipment, and detects the response pulse by detecting the low level of the leading edge of the leading pulse of the twin pulse. This is done using the body parts.
第４図はＤＭＥ／Ｐの送信ツインパルスの波形図である
。第４図に示す如く、たとえば５％〜３０％の低レベル
部位が受信の除の検出対象となりている。つまり、かか
る低レベル検出によりマルチパス波の影響を最小化しう
ろことを狙っているのである。これによって期待しうる
測距精度の改善は一層が目標となっている。このため、
パルスの立上りも急峻なものが利用される。FIG. 4 is a waveform diagram of the DME/P transmission twin pulse. As shown in FIG. 4, for example, a low level region of 5% to 30% is targeted for reception rejection detection. In other words, the aim is to minimize the effects of multipath waves through such low-level detection. The goal is to further improve the distance measurement accuracy that can be expected from this. For this reason,
A pulse with a steep rise is also used.
このような波形を安定して出力するためには前述した如
く、ＣＲ増幅の非線形歪の除去がいよいよ重要であるが
、従来この歪の除去は次のようにして実施されている。In order to stably output such a waveform, as described above, it is all the more important to remove the nonlinear distortion of CR amplification, and conventionally, this distortion has been removed as follows.
すなわち、従来は、送信パルスを出力してみて、これと
理想波形を比較し、その差異がなくなるまでＣ級電力増
幅器に供給する変調波形を補正しこれを変調用基準波形
としてＲＯＭ等に格納し、送信トリガ入力の都度これを
挽出しＣ級増幅器でキャリアを変調するという方式をと
っている。In other words, in the past, a transmission pulse was output, compared with an ideal waveform, the modulation waveform supplied to the class C power amplifier was corrected until the difference disappeared, and this was stored in a ROM etc. as a reference waveform for modulation. , a method is adopted in which the signal is recovered each time a transmission trigger is input and the carrier is modulated using a class C amplifier.
上述した従来のこの種の波形整形回路には次のような種
種の問題点がある。The above-mentioned conventional waveform shaping circuit of this type has the following various problems.
すなわち、その（１）は、Ｃ級増幅器の非直線性を補償
するためにあらかじめ歪ませた変調波形を用意しておく
必要があることであり、その（２）は、折角こうして用
意した変調波形もＣ級増幅器の特性のばらつきにより波
形、スペクトルが変化することが避けられないというこ
とであシ、その（３）は個個のＣ級増幅器ごとに変調波
形を合わせると互換性が問題となることであシ、その（
４）は、オープンルーズによる波形整形のため温度、経
時変化に対応できないといったさまざまな欠点がある。In other words, (1) is that it is necessary to prepare a distorted modulation waveform in advance to compensate for the nonlinearity of the class C amplifier, and (2) is that it is necessary to prepare a distorted modulation waveform in advance to compensate for the nonlinearity of the class C amplifier. Also, it is inevitable that the waveform and spectrum will change due to variations in the characteristics of class C amplifiers, and (3), compatibility becomes a problem when the modulation waveforms are matched for each individual class C amplifier. By the way, that (
4) has various drawbacks, such as not being able to cope with changes in temperature and over time because it uses open-loose waveform shaping.
本発明の目的は上述した欠点を除去し、閉ループによる
波形整形をリアルタイムで送信出力に施すという手段を
備えることによシ、あらかじめ歪ませた変調波形を用意
する必要なく、互換性および温度、経時変化の影響を者
しく低減しうる波形整形回路を提供することにある。An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a means for applying closed-loop waveform shaping to the transmitted output in real time, thereby eliminating the need to prepare a pre-distorted modulation waveform, improving compatibility, temperature, and aging. An object of the present invention is to provide a waveform shaping circuit that can significantly reduce the influence of changes.
本発明の回路は、例えばＤＭＥ装置の地上局から機上局
に送信すべき送信出力波形に含まれる非線形増幅歪を整
形する波形整形回路において、送信出力波形をディジタ
ル化しつつ所定の波形数ごとの平均化処理を行なって出
力する平均化処理手段と、前記平均化処理手段の出力す
るディジタル化送信出力波形データと理想送信波形デー
タとを比較しその差分にもとづいて前記送信出力波形に
含まれる非線形増幅歪を補正するように前記送信出力波
形を整形する送信出力波形手段とを備えて櫂成される。The circuit of the present invention can be used, for example, in a waveform shaping circuit that shapes nonlinear amplification distortion included in a transmission output waveform to be transmitted from a ground station to an airborne station of a DME device. An averaging processing means that performs averaging processing and outputs the data, and compares the digitized transmission output waveform data outputted by the averaging processing means with the ideal transmission waveform data, and calculates the nonlinearity contained in the transmission output waveform based on the difference. and transmission output waveform means for shaping the transmission output waveform so as to correct amplification distortion.
〔実施例〕 次に図面を参照して本発明の詳細な説明する。〔Example〕 Next, the present invention will be described in detail with reference to the drawings.
第１図は本発明の一実施例のブロック図であり、ＤＭＥ
／Ｐを対象として実施しており、検波器１、Ａ−Ｄコン
バータ２、入力バッファ３、平均化器４、変調波形補正
器５、理想波形メモリ６、変調波形初期化器７、初期化
データ８、出力バッファ９、Ｄ−Ａコンバータ１θ等を
備えて構成され、第１図にはなお、送信系の変調部１０
０と電力増幅部２００とを併記して示す。FIG. 1 is a block diagram of one embodiment of the present invention.
/P, and includes a detector 1, A-D converter 2, input buffer 3, averager 4, modulation waveform corrector 5, ideal waveform memory 6, modulation waveform initializer 7, and initialization data. 8, an output buffer 9, a D-A converter 1θ, etc., and FIG.
0 and the power amplifying section 200 are shown together.
検波器工は電力増幅器２００の送信出力を直Ｍ検波し送
信出力波形を抽出する。こうして抽出された送信出力波
形は第４図に示すものでパルス；μが３．５μｓである
。この送信出力波形はＡ−Ｄコンバータ２でディジタル
化されたのち人力バッファ３に格納される。こうして格
納されるデータは、検波ノイズ、検出ジッター、Ａ−Ｄ
処理に伴なう量子化ノイズ等の各糧ノイズ除去と突出デ
ータ排除のため平均化器４で平均化処理を行なう。The detector performs DC detection on the transmission output of the power amplifier 200 and extracts the transmission output waveform. The transmitted output waveform extracted in this way is shown in FIG. 4, and the pulse; μ is 3.5 μs. This transmission output waveform is digitized by an A-D converter 2 and then stored in a manual buffer 3. The data stored in this way includes detection noise, detection jitter, A-D
Averaging processing is performed by an averaging unit 4 in order to remove various noises such as quantization noise accompanying the processing and to remove prominent data.
平均化器４は、入力バッファに格納されたディジタル化
送信出力波形データを所定の波形分、本実施例では８波
形分積算して平均化を行ない、こうして大幅にノイズ低
減と平均化を図ったものを次に変調波形補正器５に供給
する。The averager 4 integrates and averages the digitized transmission output waveform data stored in the input buffer for a predetermined waveform, eight waveforms in this example, thereby achieving significant noise reduction and averaging. The signal is then supplied to a modulation waveform corrector 5.
変調波形補正器５は、入力する平均化器４の出力に残存
する突出データの平滑化、ならびに理想波形との差異を
補正する変調波形補正処理を行なう。The modulated waveform corrector 5 smoothes the protruding data remaining in the input output of the averager 4, and performs a modulated waveform correction process to correct the difference from the ideal waveform.
平滑化は、後述する移動平均法にもとづくＩみ関数付与
の条件で突出データの抑圧手法を利用しているが、ただ
、入力した平均化ディジタル送信出力波形の数サンプル
ずつの移動平均をとる方法では波形の立上シ部のデータ
が等髄内に遅れて位相ずれを起し、従って測距誤差の増
大につながるので次のような手順を採用している。Smoothing uses a method of suppressing prominent data under the condition of applying an I function based on the moving average method described later, but there is a method of taking a moving average of several samples of the input averaged digital transmission output waveform. In this case, the data at the rising edge of the waveform is delayed within the isomedullary region, causing a phase shift, which leads to an increase in distance measurement error, so the following procedure is adopted.
すなわち、本実施例では上述した問題を避けるため、理
想的送信出力波形データと入力との差分をとりてからこ
の差分に対し移動平均法による平滑化を適用するように
している。That is, in this embodiment, in order to avoid the above-mentioned problem, the difference between the ideal transmission output waveform data and the input is calculated, and then smoothing using the moving average method is applied to this difference.
第２図は第１図の実施例における平滑化処理説明図であ
る。FIG. 2 is an explanatory diagram of the smoothing process in the embodiment of FIG. 1.
第２図に示す積算平均化データｆｎ（ｔ）は、平均化器
４で得られる８波形分の積算平均であり、この平均化処
理でもデータの分散程度はかなり抑圧されるが、それで
もなお突出データが残る。変調波形補正器５は、理想波
形メモリ６から読出した理想波形データｔ。（ｔ）と２
％（ｔ）との差分データΔｆ％（ｔ）を算出し、この差
分データに移動平均法を適用して平滑化差分データを得
る。The cumulative averaged data fn(t) shown in FIG. Data remains. The modulated waveform corrector 5 receives ideal waveform data t read from the ideal waveform memory 6. (t) and 2
%(t) is calculated, and the moving average method is applied to this difference data to obtain smoothed difference data.
第３図は第１図の実施例における平滑化処理に利用する
移動平均法の説明図である。FIG. 3 is an explanatory diagram of the moving average method used in the smoothing process in the embodiment of FIG. 1.
一般にル個の点を含む離散的波形Ｘ（−）があるとする
。ここで４＝１ 、２ 、・・・・・・ルである。これ
に対してＮ＝２ｍ＋１の点を含む左右対称な重み関数Ｗ
（７’）を設定する。ここでノ＝ −ｍ 、・・・−１
，０，１・・・扉である。この重み関数ＷＵ）を付与し
たＸ（（）の点（における平均値ｙ（＜）は次の（１）
式で示される。Assume that there is a discrete waveform X(-) that generally includes R points. Here, 4=1, 2, . . . le. On the other hand, a symmetrical weighting function W including N=2m+1 points
(7') is set. Here, ノ = -m,...-1
, 0, 1... It is a door. The average value y(<) at the point (of X() given this weighting function WU) is the following (1)
It is shown by the formula.
通常Ｗは計算処理の便宜を図って２ をとっている。こ
のような条件を満たすものとして例示するのが第３図の
内容である。′第３図には＝＝＜１＞の３点を対象とし
１点ずつシフトしながら移動平均を（１）式にもとづっ
て求めつつデータの平滑化を図る場合と、 ！（（）の
７点を対象として移動平均を求める場合の２例を示して
いるが、いずれも中央データに他のデータの２倍の貞み
を付与している。この重みは、平滑化の目的等を勘案し
適宜設定し得るものである。Normally, W is set to 2 for convenience of calculation processing. The contents of FIG. 3 are exemplified as satisfying these conditions. 'Figure 3 shows two cases in which the moving average is calculated based on equation (1) while shifting one point at a time, targeting three points ==<1>, and smoothing the data. Two examples are shown in which the moving average is calculated for the seven points in (), but in both cases, the central data is given twice the precision as the other data.This weight is used for smoothing. It can be set as appropriate, taking into consideration the purpose, etc.
ふたたび第１図に戻って実施例の説明を続行する。Returning again to FIG. 1, the description of the embodiment will be continued.
変調波形補正器５は、こうして得られる平滑化差分デー
タで理想波形データの補正を行ない、これを出力バッフ
ァ９に供給する。この補正は理想波形データに対し平滑
化差分データの極性全反転し同じサンプル点のデータご
とにディジタル加算する形式で行なわれる。このよりな
補正の結果、理想送信波形データは０級項幅による非線
形子分を見越した歪があらかじめ付与されて第２図の補
正データの如くなり、逆にＣ級増幅の歪を受けることに
よって理想送信波形となりて出力されることとなる。The modulated waveform corrector 5 corrects the ideal waveform data using the smoothed difference data obtained in this way, and supplies this to the output buffer 9. This correction is performed by completely reversing the polarity of the smoothed difference data with respect to the ideal waveform data, and digitally adding the data at the same sample point. As a result of this further correction, the ideal transmission waveform data is predistorted in anticipation of the nonlinear component due to the width of the 0th class term, and becomes the corrected data shown in Figure 2, and conversely, by being subjected to distortion from the class C amplification, The ideal transmission waveform will be output.
出力バッファ９に格納された補正ずみの変調阪形データ
は次次に読出され、Ｄ−Ａコンバータ１０でアナログ変
換され変調部１００に供給すべき変調波形として利用さ
れる、。The corrected modulated waveform data stored in the output buffer 9 is read out one after another, converted into analog by the DA converter 10, and used as a modulated waveform to be supplied to the modulation section 100.
この変調波形の補正において、送信信号が得られない初
期補正に対しては次の手段が用意され、システム起動時
の時間短縮を図っている。In this modulation waveform correction, the following means are provided for initial correction when no transmission signal is obtained, in order to shorten the time required to start up the system.
初期化データメモリ８には、最新の運用時における送信
出力波形に関するデータ等を利用し、とれを初期化デー
タとして格納される。In the initialization data memory 8, data regarding the transmission output waveform during the latest operation is used, and the distortion is stored as initialization data.
変調波形初期化器７は、理ぜ波形メモリ６から読出した
理想送信波形データを初期化データで補正したものを補
正初期値として変調波形補正器５を介して出カバソファ
に格納せしめ、かくして初期値を確保する。The modulation waveform initializer 7 corrects the ideal transmission waveform data read from the rational waveform memory 6 with the initialization data and stores it in the output buffer via the modulation waveform corrector 5 as a correction initial value, thus making the initial value the initial value. ensure that
変調部１００ｔ’！、こうして受ける送信出力波形を利
用し所定の変調形式のパルスＡ Ｍ 変ｆ、ｈ’４信号
を発生しこれを電力増幅部２００に供給し、電力増幅部
２００はこれを送信出力レベルに電力増幅しアンテナ系
に供給する。この送信出力の１部はレベル分岐され検波
器１に供給され、変調波形初期化に引続き閉ループによ
る送信波形の整形が繰返される。Modulation section 100t'! , the received transmission output waveform is used to generate a pulse A M variable f, h'4 signal in a predetermined modulation format, and this is supplied to the power amplification section 200, which power amplifies this to the transmission output level. and supplies it to the antenna system. A part of this transmission output is level-divided and supplied to the detector 1, and following modulation waveform initialization, the transmission waveform is repeatedly shaped in a closed loop.
なお、上述した９４ｍ例では、初期化データとして運用
上の最新の送信出力波形−データ、すなわち最終運用時
取得した送信出力波形データを利用しているがこれは初
期化に利用しうるものであれば何でもよく、ｌだ、運用
上特にこの初期化を必要としないときは、変調波形初期
化器７や初期化データメモリ８は削除しうる。Note that in the 94m example described above, the latest operational transmission output waveform data, that is, the transmission output waveform data obtained during the final operation, is used as initialization data, but this may be used for initialization. If this initialization is not particularly required for operation, the modulation waveform initializer 7 and the initialization data memory 8 can be deleted.
〔発明の効果〕
以上説明した如く本発明によれば、送信出力波形のＣ級
増幅による非線形歪を補正、整形する波形整形回路にお
いて、送信出力波形を分岐出力しつつ、この送信出力波
形に含まれる非線形歪をリアルタイムで閉ループにより
補正するという手段を備えることによシ、温度ならびに
経時変化のほかＤ 工、ｉ Ｅ ｇ置ごとの製造上のば
らつきを含む非線形歪の影響を大幅に−減しう２ととも
に、ディジタル処理にもとづく精密なコントロールも可
能となシはぼ理想波形に整形しうる波形整形回路が実現
できるという効果がある。[Effects of the Invention] As explained above, according to the present invention, in a waveform shaping circuit that corrects and shapes nonlinear distortion caused by class C amplification of a transmission output waveform, while branching out the transmission output waveform, By providing a means for correcting the nonlinear distortion that occurs in real time in a closed loop, the effects of nonlinear distortion, including temperature and aging changes, as well as manufacturing variations from position to position, can be significantly reduced. In addition to the second advantage, it is possible to realize a waveform shaping circuit that can perform precise control based on digital processing and can shape an ideal waveform.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図の実施例における平滑化処理説明図、第３図は第
１図の実施例における平滑化処理に利用する移動平均法
の説明図、第４図は高精度ＤＭＥ装置の送信ツインパル
スの波形図である。
１・・・・・・検波器、２・・・・・・Ａ−Ｄコンバー
タ、３・・・・・・入カパッファ、４・・・・・・平均
化器、５・・・・・・変調波形補正器、６・・・・・・
理想波形メモリ、７・・・・・・変調波形初期化器、８
・・・・・・初期化データメモリ、９・・・・・・出力
バッファ、１０・・・・・・Ｄ／Ａコンバータ、１００
・・・・・・変調部、２００・・・・・・電力増幅部。
代理人 弁理士 内 原 音
蒋 ２ 河
Ｗ二Ｊ
茅 ３ 菌Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of smoothing processing in the embodiment of Fig. 1, and Fig. 3 is a movement used for smoothing processing in the embodiment of Fig. 1. FIG. 4, which is an explanatory diagram of the averaging method, is a waveform diagram of twin pulses transmitted by a high-precision DME device. 1...Detector, 2...A-D converter, 3...Input buffer, 4...Averaging device, 5... Modulation waveform corrector, 6...
Ideal waveform memory, 7...Modulation waveform initializer, 8
...Initialization data memory, 9...Output buffer, 10...D/A converter, 100
...Modulation section, 200... Power amplification section. Agent Patent Attorney Uchihara Otochi 2 Kawa Wji J Kaya 3 Bacteria
Claims (1)
平均化処理を行なって出力する平均化処理手段と、 前記平均化処理手段の出力するディジタル化送信出力波
形データと理想送信波形データとを比較しその差分にも
とづいて前記送信出力波形に含まれる非線形増幅歪を補
正するように前記送信出力波形を整形する送信出力波形
整形手段とを備えて前記迷信出力波形に含まれる非線形
増幅歪を整形することを特徴とする波形整形回路。[Claims] Averaging processing means that performs averaging processing for each predetermined number of waveforms while digitizing a transmission output waveform and outputs the result, and digitized transmission output waveform data output from the averaging processing means and ideal transmission. a transmission output waveform shaping means for shaping the transmission output waveform so as to compare the waveform data and correct nonlinear amplification distortion included in the transmission output waveform based on the difference; A waveform shaping circuit characterized by shaping amplification distortion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4189887A JPS63208781A (en) | 1987-02-24 | 1987-02-24 | Waveform shaping circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4189887A JPS63208781A (en) | 1987-02-24 | 1987-02-24 | Waveform shaping circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63208781A true JPS63208781A (en) | 1988-08-30 |
| JPH057669B2 JPH057669B2 (en) | 1993-01-29 |
Family
ID=12621105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4189887A Granted JPS63208781A (en) | 1987-02-24 | 1987-02-24 | Waveform shaping circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63208781A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006042227A (en) * | 2004-07-30 | 2006-02-09 | Nec Network & Sensor Systems Ltd | Automatic pulse waveform shaping system |
| JP2006343131A (en) * | 2005-06-07 | 2006-12-21 | Toshiba Corp | Radar device |
| JP2008190955A (en) * | 2007-02-02 | 2008-08-21 | Toshiba Corp | Pulse signal transmitting device, adjusting method of its waveform, and dme ground station device |
| JP2010066097A (en) * | 2008-09-10 | 2010-03-25 | Toshiba Corp | Distance measuring apparatus |
| JP2012163575A (en) * | 2012-05-01 | 2012-08-30 | Toshiba Corp | Distance measuring device |
| JP2016156732A (en) * | 2015-02-25 | 2016-09-01 | 株式会社東芝 | Distance measuring equipment and distance measuring method |
| WO2017213138A1 (en) * | 2016-06-08 | 2017-12-14 | 株式会社デンソー | Reception device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06336270A (en) * | 1993-05-28 | 1994-12-06 | Ikeno Shiki:Kk | Usage for pocket tissue and pocket tissue paper case |
-
1987
- 1987-02-24 JP JP4189887A patent/JPS63208781A/en active Granted
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006042227A (en) * | 2004-07-30 | 2006-02-09 | Nec Network & Sensor Systems Ltd | Automatic pulse waveform shaping system |
| JP4527463B2 (en) * | 2004-07-30 | 2010-08-18 | Ｎｅｃネットワーク・センサ株式会社 | Automatic pulse waveform shaping method |
| JP2006343131A (en) * | 2005-06-07 | 2006-12-21 | Toshiba Corp | Radar device |
| JP2008190955A (en) * | 2007-02-02 | 2008-08-21 | Toshiba Corp | Pulse signal transmitting device, adjusting method of its waveform, and dme ground station device |
| JP2010066097A (en) * | 2008-09-10 | 2010-03-25 | Toshiba Corp | Distance measuring apparatus |
| JP2012163575A (en) * | 2012-05-01 | 2012-08-30 | Toshiba Corp | Distance measuring device |
| JP2016156732A (en) * | 2015-02-25 | 2016-09-01 | 株式会社東芝 | Distance measuring equipment and distance measuring method |
| WO2017213138A1 (en) * | 2016-06-08 | 2017-12-14 | 株式会社デンソー | Reception device |
| JP2017220820A (en) * | 2016-06-08 | 2017-12-14 | 株式会社デンソー | Receiving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH057669B2 (en) | 1993-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1766825B1 (en) | System and method for differential iq delay compensation in a communications system utilizing adaptive aqm compensation | |
| US8164496B2 (en) | Mismatch compensators and methods for mismatch compensation | |
| US7782235B1 (en) | Adaptive mismatch compensators and methods for mismatch compensation | |
| US9014299B2 (en) | Digital pre-distortion system for radio frequency transmitters with reduced sampling rate in observation loop | |
| US7769103B2 (en) | Amplifier system employing analog polynomial predistortion with sub-nyquist digital adaptation | |
| JP5259093B2 (en) | DME ground station equipment | |
| US8928403B2 (en) | Envelope path processing for envelope tracking amplification stage | |
| AU630978B2 (en) | Transmitter | |
| US7791413B2 (en) | Linearizing technique for power amplifiers | |
| KR20010033536A (en) | Feed forward amplifier with digital intermodulation control | |
| WO2016031108A1 (en) | Fmcw radar | |
| US8358719B2 (en) | Method and device for the compensation of signal errors in IQ-modulators | |
| JPS63208781A (en) | Waveform shaping circuit | |
| US9344041B2 (en) | Polar amplification transmitter distortion reduction | |
| EP2541811A2 (en) | Apparatus for generation of corrected vector wideband RF signals | |
| US11251803B2 (en) | Non-linearity correction | |
| US7782153B2 (en) | Timing adjusting method and timing adjusting apparatus | |
| KR20040080353A (en) | Signal sample acquisition techniques | |
| US8755757B2 (en) | Amplifier apparatus, radio transmitting apparatus including same, and method of adjusting gain of amplifier apparatus | |
| CN106888000B (en) | Measuring device with ALC circuit | |
| CN113126065A (en) | Receiving end input offset cancellation device and method in distance sensing system | |
| CN111308224B (en) | Signal flatness compensation method of radio astronomical receiver and radio astronomical receiver | |
| JPH07154315A (en) | Method for correcting amplitude and phase distortions in both bqualizer and transmission system | |
| EP1258078B1 (en) | System for estimating a non-linear characteristic of an amplifier | |
| US20040146128A1 (en) | Method to compensate for a step DC disturbance in a digital baseband signal in a homodyne radio receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |