FREQUENCY CONVERSION DEVICE AND FREQUENCY CONVERSION METHOD

• Main Authors: IKEDA YUSUKE, ASAO HIROYUKI, IZUMIKURA KENJI, AKIBA HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 16.11.2017
• Subjects: BASIC ELECTRONIC CIRCUITRY; DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

PROBLEM TO BE SOLVED: To provide a frequency conversion device capable of reducing leakage of an unwanted wave into an output signal while suppressing enlargement or complication of the device.SOLUTION: A frequency conversion device is configured to include distribution means 1, signal generation means 2, filter generation means 3 and convolution operation means 4. The distribution means 1 is configured to distribute an inputted signal into a first input signal and a second input signal. The signal generation means 2 is configured to output a signal obtained by mixing the first input signal with a first local oscillation signal and further mixing it with a second local oscillation signal, as a second intermediate signal. The filter generation means 3 is configured to output a signal obtained by mixing the second input signal with a third local oscillation signal having a predetermined frequency difference from the first local oscillation signal and further by mixing it with a fourth local oscillation signal having a predetermined frequency difference from the second local oscillation signal, as a fourth intermediate signal. The convolution operation means 4 is configured to outputs an intermediate frequency signal by performing a convolution operation of the second intermediate signal and the fourth intermediate signal.SELECTED DRAWING: Figure 1 【課題】装置の大型化や複雑化を抑制しつつ、出力信号への不要波の漏れ込みを低減することができる周波数変換装置を得る。【解決手段】周波数変換装置を、分配手段１と、信号生成手段２と、フィルタ生成手段３と、畳み込み演算手段４を備える構成とする。分配手段１は、入力された信号を第１の入力信号と、第２の入力信号とに分配する。信号生成手段２は、第１の入力信号と、第１の局部発振信号とを混合し、さらに、第２の局部発振信号とを混合した信号を第２の中間信号として出力する。フィルタ生成手段３は、第２の入力信号と、第１の局部発振信号とは所定の周波数の差がある第３の局部発振信号とを混合し、さらに、第２の局部発振信号とは所定の周波数の差がある第４の局部発振信号とを混合した信号を第４の中間信号として出力する。畳み込み演算手段４は、第２の中間信号と、第４の中間信号との畳み込み演算を行い、中間周波数信号を出力する。【選択図】 図１