@mastersthesis{TUW-111536, author = {Kirchauer, Heinrich}, title = {{O}ptimal {F}ilters for {S}ignal {E}nhancement: {T}ime-{F}requency {A}nalysis and {D}esign}, school = {{I}nstitut f{\"u}r {N}achrichtentechnik und {I}nformationstechnik}, year = {1994} }