Title :
Combined carrier phase tracking and equalization for π/4-DQPSK signals in mobile radio
Author :
Chen, Ten-Szu ; Liu, Der-Zheng ; Wei, Che-Ho
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
The digital sinlock loop (DSL) is a nonuniform-sampling digital phase-locked loop (DPLL), whose phase error detector, using the arcsine function with the quadrature samples of the incoming signal, has a linear characteristic with a period of 2π. The phase equalizer using the decision-feedback phase tracking method operates only on the phase information to avoid the multiplication operations required in conventional equalization algorithms. In this paper, combined carrier phase tracking and phase equalization is investigated for π/4-DQPSK signals in a mobile radio system
Keywords :
decision feedback equalisers; differential phase shift keying; digital phase locked loops; digital radio; digital signals; mobile radio; quadrature phase shift keying; tracking; π/4-DQPSK signals; arcsine function; combined carrier phase tracking/equalization; decision-feedback phase tracking method; digital phase-locked loop; digital sinlock loop; linear characteristic; mobile radio; nonuniform-sampling digital PLL; phase equalizer; phase error detector; quadrature samples; AWGN; DSL; Detectors; Digital filters; Equalizers; Fading; Land mobile radio; Phase detection; Phase locked loops; Sampling methods;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.778790
