Generation device of 1/2 sine window function signal and generation system of filtering signal

The invention discloses a 1/2 sine window function signal generating device and a filtering signal generating system. The 1/2 sine window function signal generating device comprises a summator, a subtracter, a first integrator, a second integrator and a delayer. The subtracter, the first integrator and the second integrator are sequentially connected, the second integrator is connected with the subtracter to form closed loop feedback, the first integrator is respectively connected with the adder and the delayer, and the delayer is connected with the adder. An input signal can be sequentially transmitted to the subtracter, the integrator, the delayer and the adder, a 1/2 sine window function is generated through the subtracter, the integrator, the delayer and the adder, different from an existing window function, a steepest tracking filter is constructed through a 1/2 sine window function signal, steepest filtering tracking is achieved, an exponential tracking mechanism is broken through, and the steepest trac