What is PM QPSK?
ABSTRACT. The performance of polarization multiplexed, quadrature phase shift keying (PM QPSK) and polarization multiplexed 16-ary quadrature amplitude modulation (PM 16-QAM) is considered with an emphasis on the signal processing algorithms that compensate transmission impairments and implement key receiver functions.
What is coherent DSP?
DSP in Coherent Systems The digital coherent DSP is a digital signal processing LSI for large-capacity communication using intensity-phase modulation, and is the core device of digital coherent communication systems.
What is dp QPSK?
The terms QPSK stands for Quadrature Phase Shift Keying and DP-QPSK stands for Dual Polarization Quadrature Phase Shift Keying. DP-QPSK is used in optical communication to represent laser output into symbols for transmission in order to reduce the bandwidth in the transmission of information.
What is coherent module?
A right R-module M is called coherent if Ker(f) is finitely generated for any R-module homomorphism f:L→M with L finitely generated. It is well-known that the full subcategory Coh(R) of Mod(R) consisting of coherent modules is an abelian category.
What is coherent modulation?
Coherent Modulation is a technique that uses modulation of Amplitude and Phase of light, as well as transmission across two polarizations to enable transport of more information across the optical fiber.
What is the difference between coherent and non coherent modulation?
Coherent systems means that the receiver need the phase information of the transmitter (the carrier phase) to recover the transmitted data at receiver side. In non coherent systems, the receiver do not need the phase information of the transmitter carrier to recover the signal.
What is a coherent transponder?
[kō′hir·ənt tranz′pänd·ər] (electronics) A transponder in which a fixed relation between frequency and phase of input and output signals is maintained.
What is 100G coherent technology?
100G coherent DWDM technology enables the transport of 100G capacity over a single wavelength across long distances. Network expansion using multi-rate 100G muxponder/transponder, supporting any mix of Ethernet, Fibre Channel, OTN and SONET/SDH services over long distances.
Where is QPSK used?
QPSK allows the signal to carry twice as much information as ordinary PSK using the same bandwidth. QPSK is used for satellite transmission of MPEG2 video, cable modems, videoconferencing, cellular phone systems, and other forms of digital communication over an RF carrier.