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JP2000004173A Expired / Lapsed JP ⏱️ 0.0 years remaining

Digital transmitter distortion detection method and apparatus

Assignee: Denso Corp
•
Filing: 1998-06-17
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Granted: —
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Expires: 2018-06-17
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 デジタル送信機において生じる送信信号の歪 をスペクトラムアナライザ等を用いることなく簡単に検 出し得る歪検出方法及び装置を提供する。 【解決手段】 送信機のパワーアンプからアンテナ側に 出力される送信信号を検波回路32で包絡線検波し、そ の検波電圧Vsを、バッファ34を介してCPUに出力 すると共に、ピークホールド回路36に入力する。ピー クホールド回路36では、検波電圧Vsのピーク値(電 圧)Vpを検出し、CPUに出力する。そして、CPU では、検波電圧Vsの平均値(電圧)Vaを検出し、こ の平均電圧Vaとピーク電圧Vpとの比(Vp/Va) を、送信信号の歪量として求め、この歪量が規定値を中 心とする所定範囲内になるよう、パワーアンプへの供給 電力(電流)を制御する。この結果、送信信号の歪を送 信機内で検出し、パワーアンプでの電力消費量を必要最 小限に抑えることができる。 PROBLEM TO BE SOLVED: To provide a distortion detection method and apparatus capable of easily detecting distortion of a transmission signal generated in a digital transmitter without using a spectrum analyzer or the like. SOLUTION: A transmission signal output from a power amplifier of a transmitter to an antenna side is subjected to envelope detection by a detection circuit 32, and a detection voltage Vs is output to a CPU via a buffer 34, and is transmitted to a peak hold circuit 36. input. The peak hold circuit 36 detects a peak value (voltage) Vp of the detection voltage Vs and outputs it to the CPU. And CPU Then, an average value (voltage) Va of the detection voltage Vs is detected, and a ratio (Vp / Va) between the average voltage Va and the peak voltage Vp is detected. Is obtained as the amount of distortion of the transmission signal, and the power (current) supplied to the power amplifier is controlled such that the amount of distortion falls within a predetermined range centered on a specified value. As a result, the distortion of the transmission signal can be detected in the transmitter, and the power consumption of the power amplifier can be minimized.

Inventors

  • 👤 Shigenori Sonobe
  • 👤 鎮則 薗部

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-08 17:51
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32; H03F1/02; H03F2200/00; H03F2200/435

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