phase shift keying


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phase shift keying

n
(Broadcasting) See PSK
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Chip modulation may be any version of coherent modulations, such as BPSK, QPSK, 8-PSK (Phase Shift Keying), but generally, binary phase shift keying (BPSK) is employed.
High-speed optical communications technology provider Opnext Inc (Nasdaq:OPXT) announced on Wednesday that it has demonstrated a single wavelength, real-time coherent 127G PM-QPSK (Polarisation Multiplexed Quadrature Phase Shift Keying) modem on the TeliaSonera network running through Sweden.
Customers can leverage the solutionAcentsAAs advanced signal processing technologies, which use Dual Polarization Quadrature Phase Shift Keying (DP QPSK) modulation, coherent detection and electronic dispersion compensation to transmit four times as much information across existing 10G networks.
Digital modulation techniques are applied to optical communications systems and networks, in areas such as binary and quadrature amplitude shift keying, phase shift keying, differential shift keying, continuous phase shift keying, frequency shift keying, multilevel modulation, and multi-subcarriers.
Ultra-long distance connections of 9,000km are now possible through Nortel's recent development of a 40G Ultra Long Haul solution which employs coherent Dual Polarization Binary Phase Shift Keying (DP BPSK) technology that can more than double the distance that 40G traffic can travel.
* Differential phase shift keying (DPSK) codes the bit information into the phase of the optical signal, providing a 3 dB higher OSNR sensitivity than duobinary modulation, but receiver costs rise;
For the 3Mbps transmission the modulation form is differentially encoded 8-ary Phase Shift Keying (8 DPSK).
Tokyo, Japan, June 26, 2007 - (JCN) - In April 2007, Yokogawa and Fujitsu collaborated to develop the world's first differential quadrature phase shift keying (DQPSK) technology to enable 40Gbps in optical communications.
The transmission breakthrough was made possible using the differential phase shift keying (DPSK) method, a new coding scheme for high-capacity communications developed at Bell Labs.
In digital modulation schemes such as quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM), the lower the integrated phase, the higher the data rate.
The former uses differential binary phase shift keying (DBPSK) and the latter uses differential quadrature phase shift keying (DQPSK).