Device and method for achieving rotational invariance in a multi

Details Device and method for achieving rotational invariance in a multi Device and method for achieving rotational invariance in a multi

1995-08-22

1996-07-09

Nguyen, Hoa T.

Excavating

371 43, 371 56, 375242, 375244, 375265, G06F 1100

Patent

active

055352286

ABSTRACT:
A device (100) and method (400) are set forth that provide a parity check that utilizes a nonlinear dependence upon bits other than the parity bit alone. The 4D 16-state Wei trellis code is made transparent to m.multidot.90 degree rotations by utilizing a parity generating unit that generates a parity check bit based on at least a second rotationally significant label bit. The parity check bit allows detection of errors in a first rotationally-significant label bit, i.e., allows for achievement of a rotationally transparent parity check.

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