DISTORTION COMPENSATION DEVICE AND DISTORTION COMPENSATION METHOD
To reduce delay of a communication.SOLUTION: A distortion compensation device comprises: a filter part that includes a plurality of holding parts that holds each signal, and filters an input signal by being sequentially moved from a first step holding part to a final step holding part; a calculation...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To reduce delay of a communication.SOLUTION: A distortion compensation device comprises: a filter part that includes a plurality of holding parts that holds each signal, and filters an input signal by being sequentially moved from a first step holding part to a final step holding part; a calculation part that calculates a power of a signal output from the holding part in a prior step than the holding prat in the final step from the plurality of holding parts of the filter part; an output part that outputs a distortion compensation coefficient that cancels a non-linear distortion occurred in an amplifier when amplifying the signal on the basis of the power calculated by the calculation part; and a distortion compensation part that compensates distortion of the signal output from the holding part in the final step of the filter part by using the distortion compensation coefficient.SELECTED DRAWING: Figure 2
【課題】通信の遅延を低減すること。【解決手段】歪み補償装置は、それぞれ信号を保持する複数の保持部を備え、入力信号を第１段の保持部から最終段の保持部まで順次移動させてフィルタリングするフィルタ部と、前記フィルタ部の複数の保持部のうち、前記最終段の保持部よりも前段の保持部から出力される信号の電力を算出する算出部と、前記算出部によって算出された電力に基づいて、信号増幅時に増幅器において発生する非線形歪みを相殺する歪み補償係数を出力する出力部と、前記フィルタ部の前記最終段の保持部から出力される信号を、前記出力部から出力される歪み補償係数を用いて歪み補償する歪み補償部とを有する。【選択図】図２ |
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