Patent ID: 7440490

Claim:
A method of reducing multi-user interference (MAI) in a wireless direct sequence CDMA wireless system comprising at least one base station transmitting to and receiving signals from a plurality of mobile station users, wherein the method includes reducing interference with a multi-user detector located within said at least one base station comprising the steps of: receiving at the at least one base station a digital input signal comprised of a plurality of binary code sequences from the mobile station users; processing the digital input signal with a bank of matched filters and producing matched filter output vectors from the bank of matched filters; feeding the matched filter output vectors into a superconducting digital rapid single flux quantum (RSFQ) vector processing unit applying a successive interference cancellation (SIC) iterative technique (RSFQ SIC) to solve a cross-correlation matrix to decorrelate the plurality of binary code sequences; reducing the interference by removing interference components between the binary code sequences; and feeding an output from the RSFQ SIC into a bank of Rake combiners to recover original data transmitted by the mobile station users.