Abstract
A new fast algorithm was proposed in order to solve the problem that the FIR impulse of odd points can only use inefficient MAC instruction in DSP FIR filter's design. A new expression of FIR filter impulse of odd points was deduced through theoretical analysis and a new fast algorithm based on efficient FIRS instruction was offered in case of this new expression. Comparison with traditional algorithm was implemented through computer simulation,which demonstrates computation time of program can be reduced efficiently by employing this new algorithm which can be flexibly applied in all kinds of high order FIR filter designs in real-time field.
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