https://scholars.lib.ntu.edu.tw/handle/123456789/338467
標題: | Using a forced nonlinear oscillator to implement a QPSK modulator without a 90 degree phase shifter | 作者: | Chen, J.-H. HEN-WAI TSAO |
公開日期: | 1998 | 卷: | 34 | 期: | 3 | 起(迄)頁: | 287-288 | 來源出版物: | Electronics Letters | 摘要: | A new quadriphase-shift keying (QPSK) modulator is presented. It comprises two nonlinear oscillators, one RC differentiator and two voltage control current sources (VCCSs); it is named the 'direct QPSK modulator'. Experimental results are also reported. Such a modulator is suitable for generating direct sequence spread spectrum signal in a wireless communication system, and can be packaged into an IC. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0032484808&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/338467 |
DOI: | 10.1049/el:19980138 | SDG/關鍵字: | Differentiating circuits; Electronics packaging; Integrated circuits; Oscillators (electronic); Phase shift keying; Spread spectrum communication; Nonlinear oscillators; Quadrature phase shift keying (QPSK) modulators; Voltage control current sources (VCCS); Light modulators |
顯示於: | 電機工程學系 |
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