Abstract:

A residual frequency offset correction algorithm in all-digital receiver is introduced. The algorithm detects whether there is residual frequency offset by using of mean-square error criteria, and then makes a proper step to correct the residual frequency offset by the criteria of short-time feedback algorithm. It effectively improves the increasing BER problem caused by residual frequency offset accumulation effect. The simulation results show that the BER decreases obviously after the correction and the quality of received code improves significantly.

Key words: all-digital receiver, residual frequency offset, short-term feedback