In this paper, we study the use of multiuser detection and blind detection
techniques to improve the performance of optical code-division multiple-acc
ess (OCDMA) systems. First, a new multiuser receiver known as the interfere
nce suppression receiver is proposed. Second, we study the use of blind det
ection by proposing a blind receiver for OCDMA systems. While previous stud
ies on multiuser detection are limited to systems with p-i-n detectors, ava
lanche photodiode detectors are also included here.