Patent ID: 7685495
Filing Date: 2010-03-23
Classification: H03M

Abstract:
1. An apparatus for interleaving a plurality of systematic bits and a plurality of parity bits and to generate an output sequence that is transmitted in multi-slot packets from a base station to a remote station in a wireless communication system, comprising: a demultiplexer for demultiplexing the plurality of systematic bits and the plurality of parity bits into a plurality of sequences, wherein the plurality of systematic bits and the plurality of parity bits are sequentially distributed among the plurality of sequences, wherein the plurality of parity bits comprises a first set of parity bits with a first code rate and a second set of parity bits with a second code rate different from the first code rate for the same plurality of systematic bits; a channel interleaver coupled to the demultiplexer, the channel interleaver for reordering the plurality of sequences based on an index set, for grouping the plurality of sequences into a plurality of segments and for interleaving each of the segments forming a plurality of matrices having a plurality of elements; a signal modulation unit coupled to the channel interleaver for modulating the plurality of elements of the plurality of matrices; and a truncation unit for truncating the modulated elements of each matrix of the plurality of matrices, wherein the output sequence comprises truncated modulating elements from each matrix of the plurality of matrices.