A new FPGA hardware implementation structure based on the Fx LMS improved algorithm in active noise control（ ANC） system is proposed. The structure controls the operation of each module of the ANC system by using the control signals generated by the state machine

and uses a parallel linking method in order to speed up the convergence velocity of the error signal. The Fx LMS improved algorithm architecture is designed and synthesized using the Altera Quartus II development platform and implemented on the Cyclone II FPGA development board from Altera DE2. The simulation results show that only 22 embedded multipliers and 6 % of logic cells are used in the Altera Cyclone II hardware implementation

and noise reduction performance and the convergence speed of the ANC system are improved.