Title :
New approach for QPSK modulation
Author :
Xiaoli, Liu ; Look, Law Choi ; Zhongxiang, Shen ; Aditya, Sheel ; Cheng, Qian ; Zhongliang, Sun
Author_Institution :
Sch. of EEE, NTU, Singapore, Singapore
Abstract :
QPSK modulation is usually applied to a baseband signal, and the modulated signals are converted to an RF signal for transmission. Direct QPSK modulation at radio frequency has become increasingly needed for lower costs in commercial applications. A new QPSK modulation method for RF signals is reported. A 7.0 GHz injection locked balanced oscillator with dual output ports is designed to demonstrate this method. A general S-parameter technique is used for the design of the oscillator
Keywords :
S-parameters; injection locked oscillators; microwave oscillators; nonlinear network synthesis; quadrature phase shift keying; 7.0 GHz; QPSK modulation; RF signal; S-parameter technique; dual output ports; injection locked balanced oscillator; Baseband; Distributed parameter circuits; Frequency modulation; Impedance matching; Injection-locked oscillators; Integrated circuit interconnections; Millimeter wave technology; Quadrature phase shift keying; Scattering parameters; Sun;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944579
