Patent ID: 7593475

Claim:
A method of encoding, the method comprises: receiving at least two complex signals, wherein each of the at least two complex signals includes a real component and an imaginary component; for each of the at least two complex signals, generating a swapped complex signal to include a swapped real component and a swapped imaginary component, wherein the swapped real component corresponds to the imaginary component and wherein the swapped imaginary component corresponds to the real component; and encoding the at least two complex signals and the at least two swapped complex signals to produce encoded signals; wherein a first complex signal (S 0 ) of the at least two complex signals being represented as S 0 =S 0i +√{square root over (−1)}·S 0q , where “i” denotes an in-phase component, “q” denotes a quadrature component, S 0i represents the real component of the first complex signal and S 0q represents the imaginary component of the first complex signal; wherein a second complex signal (S 1 ) of the at least two complex signals being represented as S 1 =S 1i +√{square root over (−1)}·S 1q , where “i” , where “i” denotes the in-phase component, “q” denotes the quadrature component, S 1i represents an in-phase component of the first complex signal and S 1q represents a quadrature component of the second complex signal; wherein a first swapped complex signal σ(S 0 ) of the at least two swapped complex signals being represented as σ(S 0 )=S 0q +√{square root over (−1)}·S 0i , where “i” denotes the in-phase component, “q” denotes the quadrature component, S 0q represents the swapped real component of the first swapped complex signal and S 0q represents the swapped imaginary component of the first swapped complex signal; and wherein a second swapped complex signal σ(S 1 ) of the at least two complex signals being represented as σ(S 1 )=S 1q +√{square root over (−1)}·S 1i , where “i” denotes the in-phase component, “q” denotes the quadrature component S 1q represents the swapped real component of the second swapped complex signal and S 1i represents the swapped imaginary component of the second swapped complex signal.