The CWT estimation of PSK symbol rate estimation used for radar recognition
Chi Qing-xi, Yuan Jian-quan, Chen Xu-qing, Hucheng Pei, Yibing Li · IET Conference Publications · 2009
The PSK symbol rate estimation is the important part of parameter estimation in the radar recognition. Aiming at improving the traditional estimation method's limitations due to the carrier-frequency, the sensitivity of phase noise and the time-domain histogram's disadvantage, the PSK intermediate- frequency signal was mixed to the relatively strict baseband signal firstly. Secondly, the PSK sub-code edge's detection function using the Harr Wavelet Base, the edge position and adaptive adjustment scales were defined. Lastly, the PSK symbol rate estimation method based on the Two-Scale CWT was proposed. The method not only improves the real-time and anti-noise performance, but also increases the accuracy. The MATLAB simulation verifies the improved method's effectivity, which is used for BPSK and QPSK sign.als. (4 pages)