JPWO2024252536A5 - - Google Patents
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- JPWO2024252536A5 JPWO2024252536A5 JP2024564630A JP2024564630A JPWO2024252536A5 JP WO2024252536 A5 JPWO2024252536 A5 JP WO2024252536A5 JP 2024564630 A JP2024564630 A JP 2024564630A JP 2024564630 A JP2024564630 A JP 2024564630A JP WO2024252536 A5 JPWO2024252536 A5 JP WO2024252536A5
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- Prior art keywords
- signal
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- frequency
- input signal
- calculation unit
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Claims (4)
前記周波数シフト部から出力された信号の絶対値の、一定時間の和を計算する移動和計算部と、
前記移動和計算部による計算結果を用いて、前記入力信号に含まれる特定の信号を検出する信号検出部と、を備えた
ことを特徴とする信号検出回路。 a frequency shift unit that shifts a frequency of an input signal from an analog-to-digital converter that converts an analog signal into a digital signal so that a center frequency of a band of the input signal becomes the Nyquist frequency, and outputs the shifted signal;
a moving sum calculation unit that calculates the sum of absolute values of the signal output from the frequency shift unit over a certain period of time;
a signal detection unit that detects a specific signal included in the input signal using a calculation result by the moving sum calculation unit.
前記入力信号と乗算されることによって、前記入力信号の帯域の中心周波数をナイキスト周波数へシフトさせるための信号を生成する信号生成部と、
帯域の中心周波数がナイキスト周波数へシフトされた前記入力信号の特定の帯域の信号を切り出す周波数フィルタと、
前記周波数フィルタによって切り出された特定の帯域の信号に対してダウンサンプリングを行うダウンサンプリング部と、を有する
ことを特徴とする請求項１記載の信号検出回路。 The frequency shift unit is
a signal generating unit that generates a signal for shifting a center frequency of a band of the input signal to a Nyquist frequency by being multiplied with the input signal;
a frequency filter for extracting a signal of a specific band of the input signal whose center frequency has been shifted to the Nyquist frequency;
2. The signal detection circuit according to claim 1, further comprising: a downsampling unit that performs downsampling on the signal of the specific band extracted by the frequency filter.
前記周波数シフト部から出力された信号のＩ成分及びＱ成分のいずれか一方の信号の絶対値を計算する絶対値計算部と、
前記絶対値計算部による計算結果の一定時間の信号を保持する遅延保持部と、
前記遅延保持部によって保持された一定時間の信号の和を計算する和計算部と、
前記和計算部による計算結果と、予め設定された閾値と、を比較することによって、前記入力信号に含まれる特定の信号を検出する閾値判定部と、を有する
ことを特徴とする請求項１記載の信号検出回路。 The moving sum calculation unit is
an absolute value calculation unit that calculates an absolute value of either an I component or a Q component of the signal output from the frequency shift unit;
a delay holding unit that holds a signal of the calculation result by the absolute value calculation unit for a certain period of time;
a sum calculation unit that calculates the sum of the signals held by the delay holding unit for a certain period of time;
2. The signal detection circuit according to claim 1 , further comprising: a threshold determination unit that detects a specific signal included in the input signal by comparing a result of the calculation by the sum calculation unit with a preset threshold value.
ことを特徴とする請求項１乃至３のいずれか１項記載の信号検出回路。 4. The signal detection circuit according to claim 1, further comprising the analog-to-digital converter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2023/021074 WO2024252536A1 (en) | 2023-06-07 | 2023-06-07 | Signal detection circuit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPWO2024252536A1 JPWO2024252536A1 (en) | 2024-12-12 |
| JP7618116B1 JP7618116B1 (en) | 2025-01-20 |
| JPWO2024252536A5 true JPWO2024252536A5 (en) | 2025-05-19 |
Family
ID=93795446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2024564630A Active JP7618116B1 (en) | 2023-06-07 | 2023-06-07 | Signal Detection Circuit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7618116B1 (en) |
| WO (1) | WO2024252536A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0193843U (en) * | 1987-12-14 | 1989-06-20 | ||
| BRPI0520714A2 (en) * | 2005-12-01 | 2009-05-26 | Thomson Licensing | method and equipment for determining frequency shift in a receiver |
| JP2008022355A (en) * | 2006-07-13 | 2008-01-31 | Pioneer Electronic Corp | Signal detection apparatus and signal detection method |
| JPWO2012014876A1 (en) * | 2010-07-27 | 2013-09-12 | 日本電気株式会社 | SIGNAL DETECTION DEVICE, ITS CONTROL METHOD, PROGRAM, AND RADIO COMMUNICATION DEVICE |
-
2023
- 2023-06-07 JP JP2024564630A patent/JP7618116B1/en active Active
- 2023-06-07 WO PCT/JP2023/021074 patent/WO2024252536A1/en not_active Ceased
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