Patent ID: 7903720

Claim:
A method for generating an alternative direct sequence spread spectrum symbol to chip mapping embedded in a transceiver chip for wireless subsystems comprising the steps of: a) identifying a set of nearly orthogonal pseudo random noise sequences that are used by a standard transmission protocol; b) generating a plurality of candidate sets of pseudo random noise sequences that are nearly orthogonal to said set of nearly orthogonal pseudo random noise sequences that are used by said standard transmission protocol; and c) selecting at least one of said plurality of candidate sets of pseudo random noise sequences to serve as an alternative direct sequence spread spectrum symbol to chip mapping, wherein the at least one of said plurality of candidate sets of pseudo random noise sequences selected are embedded in the transceiver chip, wherein the step of identifying a set of nearly orthogonal pseudo random noise sequences comprises identifying a set of N/2 chip sequences Z i (wherein i=1 . . . N/2) of length N that are used by a direct sequence spread spectrum standard transmission protocol, and wherein the step of generating a plurality of candidate sets of pseudo random noise sequences comprises generating a plurality of candidate sets X j (wherein j=1 . . . N/2), each consisting of N/2 pseudo random noise sequences of length N such that a mutual mean distance between each of the sequences within said candidate sets satisfies the condition |X j −Z j |≧N/2−K (wherein i,j=1 . . . N/2, i≠j).