专利名称：Impairment sensitive selection of
constellation points for communicationacross a channel
发明人：Haixiang Liang申请号：US09627571申请日：20000728公开号：US07203248B1公开日：20070410
专利附图：
摘要：An impairment compensation sequence for use in a communications systemsusceptible to one or more potential impairments each periodic in an integer number of
symbols includes N phases, wherein N is selected such that each potential impairment, ifpresent, is periodic therein, and a sequence of symbols, the sequence organized to placeat least one instance of each symbol from a predetermined set of symbols in each phaseto allow detection of the potential impairments in each of the N phases. The potentialimpairments may include robbed-bit signaling and padding. Using estimates preparedbased on such an impairment compensation sequence, individual phase intervals may begrouped according to similarity of apparent aggregate effect of the impairments thereonwithout identification of individual impairments active in the particular phases.
Constellation points may then be assigned based on group characteristics correspondingto phase intervals. In an exemplary realization, constellation points are assigned for eachof 6 constellation indices based on amplitude estimates characteristic of the groups withwhich each of 4 corresponding phase intervals are associated.
申请人：Haixiang Liang
地址：San Jose CA US
国籍：US
代理机构：Sterne, Kessler, Goldstein & Fox PLLC
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