Simple robust receiver structure for gigabit ethernet O-CDMA using matrix codes

Progress Towards a Virtual Quadrant Receiver for 4-ary Pulse Position Modulation/Optical Code Division Multiple Access (4-ary PPM/O-CDMA) Networks

“…Only a receiver with proper knowledge of the code can recover the signal. Additionally, O-CDMA potentially serves as a wavelength multiplier to traditional WDM-based technologies [3]. Although O-CDMA systems typically use on-off-keying (OOK) to apply data to the O-CDMA carrier, increased throughput can be achieved through more efficient transmission schemes, such as m-ary pulse position modulation (PPM) [4].…”

“…In this paper, we report on progress towards a 4-ary PPM virtual quadrant receiver (VQR) that performs this comparison test photonically, minimizing the number of electronic components. The device is incorporated into an O-CDMA technology demonstrator (TD) that utilizes the time/wavelength coding technique [3]. The receiver implementation lays the foundation for a compact, planar lightwave circuit (PLC)-based design, critical for reducing the device footprint within the aircraft.…”