Patent ID: 8693526

Claim:
A method of transmission from at least one transmitter to at least one receiver and subsequent recovery of a transmitted signal, the method comprising the steps of: selecting a bipolar direct sequence orthogonal signal set; replacing one of the poles of the bipolar direct sequence orthogonal signal set with a value of 0, or essentially 0, creating a unipolar direct sequence non-orthogonal signal set; assigning at least one member of the unipolar direct sequence non-orthogonal signal set to each of the transmitters; reserving at least one member of the unipolar direct sequence non-orthogonal signal set from assignment to any transmitter; modulating the transmitters energy using the assigned unipolar direct sequence non-orthogonal signal set member for each transmitter, thus creating at least one transmitted signal; receiving a received signal containing at least one of the transmitted signals; correlating the received signal with one of the assigned unipolar direct sequence non-orthogonal signal set members, yielding a first correlation product; correlating the received signal with at least one of the reserved unipolar direct sequence non-orthogonal signal set members, yielding a second correlation product; and subtracting the second correlation product from the first correlation product to yield recovery of the transmitted signal associated with the unipolar direct sequence non-orthogonal signal set member used in the first correlation product.