Title :
Initial-Estimation-Based Adaptive Carrier Recovery Scheme for DVB-S2 System
Author :
Gong, Fengkui ; Shang, Guichao ; Li, Yi ; Peng, Kerong
Author_Institution :
State Key Lab. of ISN, Xidian Univ., Xi´´an, China
Abstract :
A data-aided (DA) carrier recovery (CR) method, which can select different coarse frequency estimation (CFE) paths adaptively according to the initial-estimation of frequency offset, is proposed for the 2nd Generation Digital Video Broadcasting Satellite (DVB-S2) system to accomplish the convergence within at most 400 pilot blocks. The well-known two-step CR scheme is used for the consideration of precision and speed, whereas both the CFE and the fine frequency estimation (FFE) adopt L&R algorithm as their basic frequency estimator so that the same correlation operation can be used by both of them to decrease the realization complexity. Optimum threshold values for different CFE paths are determined by analyzing the ill-selection probability and robust Root Mean Square Error (RMSE) performance has been confirmed by our simulations.
Keywords :
digital video broadcasting; direct broadcasting by satellite; frequency estimation; mean square error methods; 2nd generation digital video broadcasting satellite; DVB-S2 system; L&R algorithm; adaptive carrier recovery; coarse frequency estimation paths; data-aided carrier recovery; fine frequency estimation; frequency offset; ill-selection probability; optimum threshold values; robust root mean square error; Complexity theory; Convergence; Correlation; Digital video broadcasting; Frequency estimation; Satellite broadcasting; Carrier recovery; DVB-S2; data-aided; root mean square error;
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.2012.2205654
