Comb Aliasing Rejection Improvement Using Modified Combs and Combs of Different Lengths
Gordana Jovanović Doleček · 2018
This paper presents a novel multiplier less two-stage comb-based decimation filter with an improved alias rejection, in comparison with the original comb filter. This is achieved by inserting additional zeros into comb folding bands provided by additional comb filters of different lengths in the second stage, and the cascaded modified combs in the first stage. The parameters of design are the same as in two-stage comb, i.e., the decimation factors of the first and second stages and the order of comb. The efficient structures are also discussed. Finally, the comparisons with the methods recently proposed in literature, are presented.