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The hardware complexity of digital filters is not controllable by straightforwardly rounding the coefficients to the quantization levels. In this paper, we propose an effective alternative that distributes a pre-defined addition budget to the multiplier-less FIR filters, which takes into account the common sub-expression sharing inside the computations. We successfully integrate a heuristic common sub-expression elimination (CSE) algorithm and the coefficient quantization by successivedoi:10.1109/iscas.2003.1206222 dblp:conf/iscas/LinYJ03 fatcat:ilufh6yptjbapnscqnczmfjyt4