| CPC G01S 17/894 (2020.01) [G01S 7/4816 (2013.01); G01S 7/4865 (2013.01); H04N 23/56 (2023.01)] | 20 Claims |
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1. A differential correlator filter comprising:
a pre-pulse region, wherein first filter coefficients in the pre-pulse region have negative values;
a pulse region comprising:
a rising edge region adjacent to the pre-pulse region, wherein second filter coefficients in the rising edge region have positive values;
an accumulation region adjacent to the rising edge region, wherein third filter coefficients of the accumulation region have positive values; and
a falling edge region adjacent to the accumulation region, wherein fourth filter coefficients of the falling edge region have positive values, wherein the accumulation region is between the rising edge region and the falling edge region; and
a post-pulse region adjacent to the pulse region, wherein the pulse region is between the pre-pulse region and the post-pulse region, wherein fifth filter coefficients of the post-pulse region have negative values.
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