Based on real-time multi-domain communication signal analysis architecture, a high-efficiency blind carrier frequency estimation algorithm using the power spectrum symmetry of the measured modulated signal is presented. The proposed algorithm, which utilizes the moving averaged power spectrum achieved by the realtime spectrum analysis, iteratively identifies the carrier frequency in according to the power difference between the upper sideband and lower sideband, which is defined and revised by the estimated carrier frequency in each iteration. When the power difference of the two sidebands converges to the preset threshold, the carrier frequency can be obtained. For the modulation analysis, the measured signal can be coarsely compensated by the estimated result, and the residual carrier frequency error is eliminated by a following carrier synchronization loop. Compared with previous works, owing to the moving averaged power spectrum normalization and the smart iterative step variation mechanism for the two sidebands definition, the carrier frequency estimation accuracy and speed can be significantly improved without increasing the computational effort. Experimental results are included to demonstrate the outstanding performance of the proposed algorithm.

JO - Metrology and Measurement Systems L1 - http://rhis.czasopisma.pan.pl/Content/90244/PDF/Journal10178-VolumeXXI+Issue2_09.pdf L2 - http://rhis.czasopisma.pan.pl/Content/90244 PY - 2014 IS - No 2 EP - 292 KW - carrier frequency estimation KW - multi-domain communication KW - signal analysis A1 - Qian Wang A1 - Xiaomei Yang A1 - Xiao Yan A1 - Kaiyu Qin PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation JF - Metrology and Measurement Systems SP - 281 T1 - High-Efficiency Carrier Frequency Estimation Algorithm for Real-Time Multi-Domain Communication Signal Analysis DA - 2014 UR - http://rhis.czasopisma.pan.pl/dlibra/docmetadata?id=90244 DOI - 10.2478/mms-2014-0024 ER -