Results 21 to 30 of about 20,301,119 (276)
EXIT Chart Based Joint Code-Rate and Spreading-Factor Optimisation of Single-Carrier Interleave Division Multiple Access [PDF]
, 2007 —In this paper, we consider the joint code-rate and spreading-factor optimisation of turbo-style iterative joint detection and decoding assisted single-carrier interleave division multiple access (SC-IDMA) systems using different-rate convolutional codes
Zhang, R +3 more
core +2 more sources
Demonstration of a 64-chip OCDMA system using superstructured fiber gratings and time-gating detection [PDF]
, 2001 We investigate the benefits of using time-gating detection in an optical code-division multiple access (OCDMA) system that comprises bipolar 64-chip long superstructure fiber Bragg grating encoders and decoders. Transmission of the codes is demonstrated,
Teh, P.C. +6 more
core +1 more source
Variable-Weight Optical Code Division Multiple Access System using Different Detection Schemes
Journal of Telecommunications and Information Technology, 2016 In this paper a Variable Weight OCDMA (VWOCDMA) system using KS code with Direct Decoding (DD), Complementary Subtraction (CS) and AND subtraction detections is proposed.
Saleh Seyedzadeh +2 more
doaj +1 more source
Photonics, 2019 Supporting multi-rate transmission is an essential factor in current optical packet switching (OPS) networks. In this paper, the author studied a multi-rate scheme capable of forwarding packets with different signal rates based on label switching.
Kai-Sheng Chen
doaj +1 more source
Techne, 2021 In this study, the performance of bipolar optical code division multiple access (OCDMA) with dual electro-optical modulator (EOM) scheme for multi-user scenario was tested and analyzed with OptiSystem version 10.
Eddy Wijanto
doaj +1 more source
Repeat accumulate code division multiple access and its hybrid detection
, 2008 In this paper, we propose the novel concept of Repeat Accumulate Code Division Multiple Access (RA-CDMA), which employs unique, user-specific channel code generator matrices (interleavers) for differentiating the users.
Chen, Sheng +3 more
core +2 more sources
Phase encoding and decoding of short pulses at 10Gb/s using superstructured fiber Bragg gratings [PDF]
, 2001 A 7-chip, 160-Gchip/s phase-shift keyed code is assigned to short pulses after reflection from a superstructured fiber Bragg grating. The code is then recognized by a second grating, which is nominally identical to the encoder grating.
Teh, P.C. +3 more
core +1 more source
Optical steganography of code-shift-keying OCDMA signal based on incoherent light source
IEEE Photonics Journal, 2015 A method to enhance the security of the optical stealth channel is proposed. The proposed method uses the techniques of polarization modulator based code-shift-keying (CSK) data modulation and optical code-division multiple-access (OCDMA) en/decoding ...
Huatao Zhu +6 more
doaj +1 more source
Applied Sciences, 2021 In this study, a bipolar optical code-division multiple-access (Bi-OCDMA) technique based on spectral amplitude coding (SAC) was proposed by using a phase modulator to realize polarization coding through a free-space optical (FSO) channel.
Eddy Wijanto, Chun-Ming Huang
doaj +1 more source
POLARIZED OPTICAL ORTHOGONAL CODE FOR OPTICAL CODE DIVISION MULTIPLE ACCESS SYSTEMS [PDF]
Progress In Electromagnetics Research, 2006 In this paper a Polarized Optical Orthogonal Code (Polarized-OOC) is proposed by exploiting the polarization property of the fiber and the chip’s polarization state. The polarized-OOC code is generated using the concept of Mark Position Difference (MPD) set.
Naser G. Tarhuni +2 more
openaire +1 more source