Title :
Effect of noisy phase reference on coherent detection of band-limited offset-QPSK signals
Author :
Fan, Feng ; Li, Loh-ming
Author_Institution :
Res. Center for Inf. Syst., Univ. of Electron. Sci. & Technol. of China, Sichuan, China
fDate :
2/1/1990 12:00:00 AM
Abstract :
The performance of bandlimited offset-quaternary-phase-shift-keying (OQPSK) systems in the presence of noisy phase reference and additive Gaussian noise is analyzed. Expressions for error probability calculation are obtained. A new search method for computing the detection loss and the required SNR of the phase reference is proposed. It is shown that when the rolloff factor for the Nyquist filtering is large, OQPSK surpasses QPSK, but when the rolloff factor is small, QPSK surpasses OQPSK
Keywords :
filtering and prediction theory; phase shift keying; random noise; signal detection; Nyquist filtering rolloff factor; OQPSK; QPSK signals; SNR; additive Gaussian noise; bandlimited offset-quaternary-phase-shift-keying; coherent detection; detection loss; error probability calculation; noisy phase reference; Additive noise; Error probability; Filtering; Gaussian noise; Performance analysis; Phase detection; Phase noise; Quadrature phase shift keying; Search methods; Signal to noise ratio;
Journal_Title :
Communications, IEEE Transactions on
