Patent ID: 8842715

Claim:
A method for increasing, at a transmitter, a payload size of a communication channel having orthogonal groups, the method comprising: referencing, at the transmitter, a base orthogonal sequence set comprising orthogonal sequences that are mutually orthogonal, the orthogonal sequence set having subsets that are sub-block orthogonal with a length of four; and selecting, at the transmitter, a spreading sequence set from a plurality of spreading sequence sets, each of the plurality of spreading sequence sets comprising an orthogonal sequence set subset combined with an imaginary orthogonal sequence set subset, wherein the selecting increases payload size; wherein the base orthogonal sequence set includes twelve orthogonal sequences and three subsets; and wherein the plurality of spreading sequence sets comprises two spreading sequence sets for an increase of one bit of payload, four spreading sequence sets for an increase of two bits of payload, and eight spreading sequence sets for an increase of three bits of payload.