Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2011-06-21
2011-06-21
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S260000, C375S259000
Reexamination Certificate
active
07965782
ABSTRACT:
A reduced complexity maximum likelihood decoder receives a stream of symbols Y and channel estimate H. A transformation converts Y and H into Z and R by computing matrix R, such that the product of R and Q produces matrix H. A second transformation column-swaps matrix H to form H′, thereafter generating Q′ and R′ subject to the same constraints as was described for Q and R. Transformed variables Z and Z′ are formed by multiplying Y by QHand Q′H, respectively. Table entries with Z and R and Z′ and R′ have entries of all possible x2accompanied by estimates of x1derived from x2and Z, and similar entries of all possible x1accompanied by estimates of x2derived from x1and Z′. Hard and soft decisions are made by finding the minimum distance metric of the combined entries of the first and second table.
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Murali Partha Sarathy
Vanka Sundaram
Vijayan Logeshwaran
Chesavage Jay A.
File-EE-Patents.com
Liu Shuwang
Neff Michael R
Redpine Signals, Inc.
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