Results 91 to 100 of about 47,365 (251)

Specific Emitter Identification Using Convolutional Neural Network-Based IQ Imbalance Estimators

open access: yesIEEE Access, 2019
Specific Emitter Identification is the association of a received signal to a unique emitter, and is made possible by the naturally occurring and unintentional characteristics an emitter imparts onto each transmission, known as its radio frequency ...
Lauren J. Wong   +2 more
doaj   +1 more source

Minimum Symbol Error Rate Turbo Multiuser Beamforming Aided QAM Receiver

open access: yes, 2008
This paper studies a novel iterative soft interference cancellation (SIC) aided beamforming receiver designed for highthroughput quadrature amplitude modulation systems communicating over additive white Gaussian noise channels.
Chen, Sheng, Hanzo, L, Tan, S
core   +1 more source

Signal Constellation Design for Cross-Phase Modulation Dominated Channels

open access: yesIEEE Photonics Journal, 2015
In this paper, we introduce an optimal signal constellation design algorithm suitable for wavelength-division-multiplexed systems dominated by cross-phase modulation (XPM), which is called XPM-OSCD.
Tao Liu, Ivan B. Djordjevic
doaj   +1 more source

Ternary Trellis Coded Modulation

open access: yesIEEE Access, 2019
Ternary trellis coded modulation (TTCM) is introduced. This combines triangular signal constellations with ternary convolutional codes. The performance of TTCM is presented and compared with binary trellis coded modulation (BTCM) which employs square ...
Mahmoud Abdelaziz, T. Aaron Gulliver
doaj   +1 more source

BER Performance of QAM and QPSK Modulation Technique for DCT Based Channel Estimation of STBC MIMO OFDM

open access: yesMATEC Web of Conferences, 2016
Consumer demand for high speed data communication system is increasing day by day. However the major challenges for wireless communication system are Inter Symbol Interference (ISI) and Inter Carrier Interference (ICI) that occur during data transmission.
Sarnin Suzi Seroja   +2 more
doaj   +1 more source

Experimental study on discretely modulated continuous-variable quantum key distribution

open access: yes, 2010
We present a discretely modulated continuous-variable quantum key distribution system in free space by using strong coherent states. The amplitude noise in the laser source is suppressed to the shot-noise limit by using a mode cleaner combined with a ...
C. H. Bennett   +6 more
core   +1 more source

Advantages of the coherent state compared with squeeze state in unidimensional continuous variable quantum key distribution

open access: yes, 2018
In this work, a comparison study between unidimensional (UD) coherent-state and UD squeeze-state protocols is performed in the continuous variable quantum key distribution domain.
Cao, Yanxia   +3 more
core   +1 more source

Performance of multiple amplitudes differential space-time block coding scheme concatenated with channel coding

open access: yesTongxin xuebao, 2007
By introducing multiple levels quadrature amplitude modulation and matrix transform method,a multiple am-plitudes differential space-time coding(DSTC) scheme was developed.The scheme can avoid the performance loss of conventional DSTC schemes based on ...
YU Xiang-bin1   +2 more
doaj   +2 more sources

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