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专利名称：Signal decoding methods and apparatus发明人：Cheran Malsri Vithanage,Christophe
Andrieu,Robert Jan Piechocki,Mong SuanYee
申请号：US11261540申请日：20051031公开号：US07620877B2公开日：20091117
专利附图：
摘要：This invention generally relates to methods, apparatus and computer programcode for decoding signals, and more particularly to trellis-based decoding using a variant
of a BCJR procedure. The invention includes a trellis decoder for decoding symbols of areceived signal, the symbol including a sequence defined by transitions between states ofa trellis, the trellis decoder including: means for performing a forward recursion throughthe trellis to determine a first set of probabilities (α(X)) each defining a probability of asaid trellis state (X) responsive to one or more current or earlier received signal values(y); means for providing a second set of (β(X)) probabilities each defining a probability ofone or more received signal values (y) given an earlier the trellis state (X); means todecode the received signal to determine probabilities (p(b|y)) for symbols of acorresponding transmitted sequence of symbols from the first and second sets ofprobabilities; and where the decoder further includes: means to select states for
determining the first set of probabilities responsive to one or more received signal valueslater than a the trellis state defining a probability in said first set.
申请人：Cheran Malsri Vithanage,Christophe Andrieu,Robert Jan Piechocki,Mong SuanYee
地址：Bristol GB,Bristol GB,Bristol GB,Bristol GB
国籍：GB,GB,GB,GB
代理机构：Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
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