A unit impulse response of an LTI system is h1[n] = u[n], and it is in parallel with another unit impulse response h2[n] from a causal LTI system. The parallel system's frequency response is -12 + 5e^(-iω) = 12 - 7e^(-i2ω) + e^(-i2ω), find h2[n].
hi[n]
H1(ω)
OH+(ω)H(ω) = (ω)H
hz[n]
Hz(ω)