GATE Electronics and Communications (EC) 2019 Solved Paper

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Question : 57 of 65
 
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Let h[n] be a length-7 discrete-time finite impulse response filter, given by
h[0]=4,h[1]=3,h[2]=2,h[3]=1,
h[−1]=−3,h[−2]=−2,h[−3]=−1
and h[n] is zero for [n]≥4. A length-3 finite impulse response approximation g[n] of h[n] has to be obtained such that
E(h,g)=∫−ππ|H(ejω)−G(ejm)|2dω
is minimized, where H(ejω) and (ejω) are the discrete-time Fourier transforms of h[n] and g[n], respectively. For the filter that minimizes E(h,g), the value of 10g[−1]+g[1], rounded off to 2 decimal places, is ___________.
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