Descrambling Bit-interleaved Traffic

A sender transmitting to several receivers as in an access network is considered. A time division multiplexing scheme based on bit-interleaving, where each receiver is given an allocation of bit positions occurring in periodic intervals within the frame, is assumed. For a scrambling based line coding, a subsampling descrambler is required to reconstruct the decimated data corresponding to the receiver's allocation. Several efficient methods are presented to accomplish this task both for fixed and variable allocations to the receivers. The proposed methods have the benefits of low power consumption and low hardware complexity thus yielding small costs.