us oid al ▁frequency ▁components . ▁Draw back s ▁of ▁the ▁broad ▁band width ▁are ▁poor ▁frequency ▁resolution ▁and ▁high ▁# No ise ▁band width . ▁ ▁Fl at ▁top ▁windows ▁can ▁be ▁designed ▁using ▁low - pass ▁filter ▁design ▁methods , ▁or ▁they ▁may ▁be ▁of ▁the ▁usual ▁cos ine - sum ▁variety : ▁ ▁The ▁Mat lab ▁variant ▁has ▁these ▁coefficients : ▁ ▁Other ▁variations ▁are ▁available , ▁such ▁as ▁s idel ob es ▁that ▁roll ▁off ▁at ▁the ▁cost ▁of ▁higher ▁values ▁near ▁the ▁main ▁lo be . ▁ ▁R ife – V in cent ▁windows ▁▁ ▁R ife – V in cent ▁windows ▁are ▁custom arily ▁scale d ▁for ▁unity ▁average ▁value , ▁instead ▁of ▁unity ▁peak ▁value . ▁ ▁The ▁coefficient ▁values ▁below , ▁applied ▁to ▁, ▁reflect ▁that ▁custom . ▁ ▁Class ▁I , ▁Order ▁ 1 ▁( K = 1 ):   ▁ ▁  ▁  ▁  ▁Function ally ▁equivalent ▁to ▁the ▁Hann ▁window . ▁ ▁Class ▁I , ▁Order ▁ 2 ▁( K = 2 ):   ▁▁ ▁Class ▁I ▁is ▁defined ▁by ▁minim izing ▁the ▁high - order ▁s idel obe ▁amplitude . ▁ ▁Co efficient s ▁for ▁orders ▁up ▁to ▁K = 4 ▁are ▁tab ulated . ▁ ▁Class ▁II ▁minim izes ▁the ▁main - lo be ▁width ▁for ▁a ▁given ▁maximum ▁side - lo be . ▁ ▁Class ▁III ▁is ▁a ▁comprom ise ▁for ▁which ▁order ▁K   =   2 ▁res emb les ▁the ▁# Black man ▁window . ▁ ▁Ad just