Abstract: The interference-resist ability can be improved by a combination of the adaptive antenna with the frequency-hopping(FH) technique. In order to effectively decrease the influence of the fast follower jammer on a frequency-hopping(FH) system, frequency compensation must be considered. A new frequency compensation method is presented, which uses the focusing matrix of the coherent signal-subspace method(CSM) to update the data matrix before the fast follower jammer's arrival. The convergence of the adaptive beamformer is improved by using the method. Computer simulation results demonstrate the effectiveness of the proposed method.

Key words: frequency hopping, focusing matrix, frequency compensation