Results 21 to 30 of about 18,147 (273)
Quadrature demultiplexing using a degenerate vector parametric amplifier [PDF]
, 2014 We report on quadrature demultiplexing of a quadrature phase-shift keying (QPSK) signal into two cross-polarized binary phase-shift keying (BPSK) signals with negligible penalty at bit-error rate (BER) equal to 10−9.
Andrekson, Peter +8 more
core +1 more source
DAC-Less amplifier-less generation and transmission of QAM signals using sub-volt silicon-organic hybrid modulators [PDF]
, 2015 We demonstrate generation and transmission of optical signals by directly interfacing highly efficient silicon-organic hybrid (SOH) modulators to binary output ports of a field-programmable gate array. Using an SOH Mach-Zehnder modulator (MZM) and an SOH
Bogaerts, Wim +10 more
core +3 more sources
Rotative quadrature phase-shift keying
Electronics Letters, 1992 A rotative quadrature phase-shift keying (RQPSK) modulation scheme is proposed. By rotating the QPSK signal constellation by pi/2, either clockwise or anticlockwise, during a symbol duration, the conventional QPSK scheme can be modified to transmit 3 bits per symbol to achieve both power and bandwidth efficiency.
J. Liu +3 more
openaire +1 more source
Quadrature‐carrier amplitude phase shift keying
IET Communications, 2019 Amplitude phase shift keying (APSK) is the emerging modulation scheme used in deep satellite communications and known to have a high spectral and energy efficiency among other two‐dimensional (2‐D) M‐ary schemes.
Abdulkerim Öztekin, Ergun Erçelebi
openaire +1 more source
Nonlinear Silicon Photonic Signal Processing Devices for Future Optical Networks
Applied Sciences, 2017 In this paper, we present a review on silicon-based nonlinear devices for all optical nonlinear processing of complex telecommunication signals. We discuss some recent developments achieved by our research group, through extensive collaborations with ...
Cosimo Lacava +2 more
doaj +1 more source
Reconfigurable Photonic Generation of Binary Modulated Microwave Signals
IEEE Photonics Journal, 2020 A novel photonic scheme of binary modulated microwave signals generation based on a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator is proposed and experimentally demonstrated.
Jialin Ma +4 more
doaj +1 more source
Investigation of a novel structure for 6PolSK-QPSK modulation
EURASIP Journal on Wireless Communications and Networking, 2017 Benefiting from the high spectrum efficiency and power efficiency, 6PolSK-QPSK (6-ary polarization-shift keying quadrature phase-shift keying) is a promising modulation format in coherent optical communication.
Yupeng Li +3 more
doaj +1 more source
IEEE Access, 2021 In order to pursue rapid development of the new generation of wireless communication systems and elevate their security and efficiency, this paper proposes a novel scheme for automatic dual determination of modulation types and signal to noise ratios ...
Tarik Adnan Almohamad +5 more
doaj +1 more source
Phase Jitter in MPSK Carrier Tracking Loops: Analytical, Simulation and Laboratory Results [PDF]
, 1997 A performance characteristic of M-ary phase shift keying (MPSK) receivers is the variance of the phase error between the received and recovered signal carriers. For binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK) loops utilizing
Kopp, Brian T., Osborne, William P.
core +2 more sources