Title :
Carrier recovery using FFT and Kalman filter
Author :
Yang, Xu ; Cui, XiaoWei ; Lu, MingQuan ; ZhenMing Fen
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
The challenge of carrier recovery for digitally phase modulated, suppressed-carrier signals has been the target of much attention in mobile radio system design for many years. In this paper, a new open-loop all-digital carrier recovery method for multiple phase shift keying (MPSK) which is based on random data modulation is presented. This method uses fast Fourier transform (FFT) along with peak detection to estimate frequency offset and uses Kalman filter to track phase. Its complexity is very low, and it is also easily implemented with digital hardware. The simulation results show that the estimator using this method achieves good performance under the condition of large frequency offset and low signal noise ratio (SNR).
Keywords :
Kalman filters; fast Fourier transforms; mobile radio; peak detectors; phase shift keying; FFT; Kalman filter; MPSK; fast Fourier transform; frequency offset estimation; mobile radio system; multiple phase shift keying; open-loop all-digital carrier recovery method; peak detection; random data modulation; signal noise ratio; Fast Fourier transforms; Frequency estimation; Hardware; Land mobile radio; Phase detection; Phase estimation; Phase frequency detector; Phase modulation; Phase shift keying; Signal to noise ratio;
Conference_Titel :
Image and Signal Processing and Analysis, 2003. ISPA 2003. Proceedings of the 3rd International Symposium on
Print_ISBN :
953-184-061-X
DOI :
10.1109/ISPA.2003.1296467