Abstract: An efficient communication system was introduced in the paper, which combined wavelet packet modulation (WPM) technology and frequency hopping technology together. Namely wavelet packet modulation frequency hopping (WPM-FH) system. The system BER performance was derived by means of characteristic function over Gaussian channel and Rayleigh fading channel respectively. The relationship between the number of users, the number of hopping points, the number of subcarriers and system performance was showed in paper. Theoretical analysis and simulation results indicate that the system maintain the advantages of wavelet packet modulation to improve the spectrum utilization. And the system has better resistance to multipath fading and anti-interference ability, the system performance is improved well.For better performance of the system in multipath fading channel, the adaptive equalization technique was introduced into the receiver , and the simulation results show that the system BER performance has been improved correspondly.