Filter banks for optimum subband coding of cyclostationary signals with dynamic bit allocation

Abstract

We consider optimal orthonormal filter banks for subband coding of wide sense cyclostationary signals, with N-periodic second order statistics. An M-channel uniform filter bank, with N-periodic analysis and synthesis filters, is used as the subband coder. Dynamic schemes involving N-periodic bit allocation are employed. An average variance condition is used to measure the output distortion. The optimum bit allocation strategy and optimal subband coder that minimizes output distortion, or equivalently maximizes coding gain, is presented.