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雑音源によるドプラシミュレータ
https://jaxa.repo.nii.ac.jp/records/35141
https://jaxa.repo.nii.ac.jp/records/35141eced1815-8b21-4f99-823b-247499cd8c3e
名前 / ファイル | ライセンス | アクション |
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SA4135022.pdf (714.2 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 雑音源によるドプラシミュレータ | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
その他のタイトル(英) | ||||||
その他のタイトル | An Electronic Simulator for the Received Doppler Signals | |||||
著者 |
東口, 實
× 東口, 實× 佐藤, 義正× 山下, 道夫× HIGASHIGUCHI, Minoru× SATO, Yoshimasa× YAMASHITA, Michio |
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出版者 | ||||||
出版者 | 東京大学航空研究所 | |||||
書誌情報 |
東京大学航空研究所集報 巻 2, 号 8, p. 619-630, 発行日 1961-12 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 機上ドプラレーダの受信信号を白色雑音源と可聴周波選択増幅器とを用いて,模擬的に発生させる回路について述べたものである.3本の空中線ビームを用いる機上ドプラレーダ方式に対応して3個の可聴周波帯信号が順次切り換えて取り出される構成とした.さらにSSB変調器を用いて中間周波帯および高周波帯の信号出力を取り出せるようにした.この結果,このような構成をとるシミュレータでは次のような点に注意すべきことがわかった.可聴周波可変周波数選択増幅器としては,この負饋還回路網に次のものを用いればよい.すなわち所要のQが10あるいはそれ以下の時には,橋絡T形RC回路網を,所要のQが20あるいは,それ以上の場合は並列T形RC回路網を用いた方がよい.次に模擬すべき信号はかなり広い幅の周波数スペクトルを持っており,かつ変化させるべき中心周波数の範囲が広いのでSSB変調器はその特性が,次のようなものでなくてはならない.すなわち搬送波の除去特性が非常に鋭く,それでいて広い帯域が必要である. | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The paper describes an electronic simulator, which produce the noise-like signal simulated to the received signal in airborne Doppler radars. The simulator consists of a white noise source and a variable-frequency selective audio-frequency amplifier with a constant Q and a gain, over the Doppler frequency range concerned. The variable-frequency selective AF amplifier, an essential part in the simulator, is examined, and an amplifier with selective negative feedback of the bridged-T RC network is recommended especially for the required Q of about 10 or less. The parallel-T RC network is also useful, but it may be suitable for the Q of about 20 or more. Shot noise in a vacuum tube is used for the white noise. In order to simulate the received signals from three beams in λ configuration, three such simulators are combined and switched in sequence. In addition, two stages SSB modulators are provided for obtaining the simualted Doppler signals in IF frequencies. Difficulties involved in those operations are also discussed in the paper. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0563-8097 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00162214 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: SA4135022000 |