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A Phase Recovery and Amplitude Compensation Scheme for QPSK All Digital Receiver Using CORDIC Algorithm  

Seo, Kwang-Nam (숭실대학교 정보통신전자공학부 무선통신스템연구실)
Kim, Chong-Hoon (숭실대학교 정보통신전자공학부 무선통신스템연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.12C, 2010 , pp. 1029-1034 More about this Journal
Abstract
For All Digital QPSK receivers, a phase recovery scheme is required to fix the arbitrarily rotated I/Q quadrature signals due to the transmission path and clock mismatch between the transmitter and the receiver. The conventional Costas phase recovery loop scheme requires a separate AGC(Automatic Gain Control) to obtain the performance independent of input signal power. This paper proposes a simple scheme which separates the phase and amplitude of the input signal via CORDIC algorithm and performs the phase recovery and amplitude compensation simultaneously. The proposed scheme can considerably reduce the logic resources in hardware implementation, has been verified by C++ and Model Sim simulations.
Keywords
Vectoring mode CORDIC; Rotaion mode CORDIC; Costas Phase Recovery Loop; Timing Recovery Loop; QPSK;
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  • Reference
1 F.M. Gardner, "Interpolation in digital modems-Part I," IEEE Trans. Commun., Vol. 41, pp.501-507, Mar. 1993.   DOI   ScienceOn
2 Fredic J. Harries, "Multirate Digital Filter for Symbol Timing Synchronization in Software Defined Radios," IEEE Journal Commun., Vol. 19, No.12, Dec. 2001.
3 Umberto Mengali and Aldo N.D'Andrea, "Synchronization Techniques for Digital Receivers," KA/PP, 1997.
4 F.M. Gardner, "Phaselock Techniques," 3th Ed., New York : Willey, 2005.
5 F.M. Gardner, "A BPSK/QPSK Timing -Error Detector for Sampled Receivers," IEEE Trans. Commun., vol. COM-34, pp.423-429, May. 1986.