Patent ID: 8139677
Filing Date: 2012-03-20
Classification: H04L

Abstract:
1. A method for determining K rotation angles for rotating a set of K input data symbols to be applied to a block code that encodes the resulting set of K rotated data symbols, the method comprising: (a) selecting a first rotation angle for a first subset of the K rotation angles; (b) for each combination of (i) each of a plurality of different possible second rotation angles for a second subset of the K rotation angles, (ii) each of a plurality of different possible codewords for the first rotation angle and each possible second rotation angle, and (iii) each of a plurality of different possible erroneously decoded codewords for each possible codeword, generating a metric for said each combination; (c) selecting a second rotation angle for the second subset of the K rotation angles based on the metrics of step (b); and (d) providing a transmitter configured based on the selected first and second rotation angles, wherein, for each set of K input data symbols, the transmitter is adapted to: