Multiplicative PIC detection for OCDMA systems with non‐negativity constraints

Projected block‐wise PIC detection for communication systems with non‐negativity constraints

“…In order to be able to fairly compare our work to that of [20–22], we use the same system model; i.e. we consider the uplink of an incoherent asynchronous OCDMA‐PON system with K active users.…”

“…This has been done in [21] where a PPIC detector has been developed and assessed. In [22], another PIC detector that is characterised by a multiplicative update equation is proposed. Compared to that of [21], the latter enjoys smooth convergence behaviour even for a highly loaded system and relaxed conditions of convergence.…”

“…For instance, the projected PIC (PPIC) detector, proposed in [21] exploits the non‐negativity constraint imposed by the data and spreading codes on the system to enhance the detection performance. Another PIC detector that makes use of the non‐negativity constraint is proposed in [22]; it exhibits smooth convergence even for a highly loaded system. Analogous to the PPIC detector, a projected SIC (PSIC) detector has been suggested in [23].…”

“…In this work, and to overcome the drawbacks of the PPIC detector proposed in [21–23], we extend the PPIC detector to the projected block‐wise PIC (PBPIC) detector. The latter exhibits many useful features such as the accelerated speed of convergence and improved conditions of convergence.…”

Advancing High-Speed Transmissions over OCDMA Networks by Employing an Intelligently Structured Receiver for Noise Mitigation

“…As PIIN is proportional to the square of the received power, launching a large-intensity light source cannot mitigate this effect. Modifying the decoder structure has become one of the leading solutions to noise suppression in OCDMA [17][18][19]. In Reference [20], rather than balanced detection with two photodiodes, a multiphotodiode scheme was proposed.…”