Resources Contact Us Home
Sphere decoder and decoding method thereof

Image Number 4 for United States Patent #8117522.

A sphere decoder sets a Euclidean distance between a lattice vector obtained by using an MMSE or ZF estimate and a received signal as an initial radius, further reduces the initial radius, and searches lattices points included inside a hypersphere with the further reduced initial radius. In addition, one lattice vector having a minimum Euclidean distance is output. One dimension is selected to reduce an initial radius, and estimates in other dimensions are kept fixed, excluding the selected dimension. Then candidate lattice points are searched in the selected dimension, excluding a current estimate, such that a minimum Euclidean distance and a lattice point estimate corresponding to the minimum Euclidean distance are obtained. The initial radius is updated by the minimum Euclidean distance, and a final lattice vector is constructed by combining a lattice point estimate corresponding to the initial radius and the lattice point estimates in other dimensions.

  Recently Added Patents
Method and apparatus for reacquiring lines in a cache
Head shield
Supplier capability methods, systems, and apparatuses for extended commerce
Vehicle location information-based abnormal driving determination and warning system
Inhibitor of casein kinase 1delta and casein kinase 1E
Recording device, recording method, and program
Switching device and electronic apparatus using the same
  Randomly Featured Patents
Printing cylinder cleaning system
Special image effect producing apparatus with memory selection
Polazo reactive dyestuffs
Method of treating Parkinson's Disease using pentanedione derivatives
Method of driving droplet jetting head, droplet jetting apparatus, and device manufacturing method
Slag removal system for a burn table
GPS data recorder and playback system
Magnetic recording/reproducing head with head elements displaced in both head width and lamination directions
Exhaust gas purifying apparatus for internal combustion engine
Fuel cell apparatus having fuel cell stack and controller, and method of manufacturing same