Translations:Frequency response of a digital system/66/en

Table 1. All-pass filter, input signal, resulting output, front end of input, and resulting output.

Time k	0	1	2	3	4
All-pass filter $p_{k}$	0.500	0.750	-0.375	0.188	-0.094
Input signal $u_{k}$	-0.750	2.750	1.000	0	0
Output $g_{k}$ for input signal	-0.375	0.813	2.844	-0.422	0.211
Front end $f_{k}$ of input signal	–0.750	0	0	0	0
Output $g_{k}$ for front end	-0.375	-0.563	0.282	-0.141	0.070