In this article, we propose a high-security transmission scheme of power division 3-D carrier-less amplitude and phase (PD-3D-CAP) based on polling-permutation encryption noise masking key distribution. By implementing the 6D Lorenz digital chaotic system, scramble 3D-CAP signal, effectively enhancing security performance system. our scheme, proposed noise-masking distribution can be considered noise-like transmitted along with encrypted signal in channel. It is important to note that...

In this paper, we propose a novel optical non-orthogonal multiple access (NOMA) scheme based on orthogonal chirp division multiplexing (OCDM) in low-cost intensity modulation and direct detection system for passive networks (PON). The proposed OCDM-NOMA can effectively improve spectral efficiency serve more users by spectrally overlaid OCDM signals power domain. Under the advantages of spread spectrum, also enhance bit error rate (BER) performance compared to NOMA frequency (OFDM). A 17.8...

This paper proposes a 7-dimensional ( <xref ref-type="disp-formula" rid="deqn6-deqn7" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">7D</xref> ) Cellular Neural Network (CNN) based offset quadrature amplitude modulation filter bank multicarrier (OQAM-FBMC) encryption scheme for seven core fiber. The chaotic sequences generated by 7D CNN are applied to produce the masking vectors encrypt phase, carrier frequency, and time. In order verify performance...

This paper proposes a 3-dimensional (3D) carrier-less amplitude and phase modulation (CAP) based on pyramid constellation design encryption scheme for 7-core fiber in passive optical network (PON). The chaos sequences generated by the 4D hyperchaotic system are applied to produce masking factor, Rubik's cube rotation rules used flip rotate points. To verify performance of proposed 3D CAP-PON system, 25.5Gb/s encrypted Pyraminx-3D-CAP-16 signal transmission over 2 km is experimentally...

In this paper, we propose a performance improvement of non-orthogonal multiple access (NOMA) with three-dimensional (3D) constellation and two-dimensional Inverse Fast Fourier Transform IFFT modulator (2D-IFFT) for the passive optical network (PON). Two kinds 3D mapping are designed generation NOMA (3D-NOMA) signal. Higher-order modulation signals can be obtained by superimposing different power levels pair mapping. Successive interference cancellation (SIC) algorithm is implemented at...

The purpose of this study is to present a security system that combines PDM and SDM based on the flexible configuration multi-channel keys. proposed will utilize three distinct approaches accommodate variety rate needs. In order enhance resource use fulfill requirements, three-channel PD-OFDM has been proposed. Key co-transmission schemes containing two sub-schemes for deal with different levels encryption. Experimental results show can transmit 126.88 Gb/s OFDM signals in unencrypted...

In this Letter, we propose a secure orthogonal frequency division multiplexing (OFDM) transmission scheme based on chaotic encryption and noise-masking key distribution. With the implementation of three-dimensional digital system, security performance is effectively enhanced by scrambling phase, symbol, subcarrier OFDM signal. The proposed distribution can mask information system into noise transmit it with encrypted signal simultaneously. By mechanism, legal receiver realize uninterrupted...

This paper proposes a novel chaotic power division multiplexing (CPDM) for secure optical multiple access. The proposed CPDM can not only improve spectral efficiency and the user number by spectrally overlaid OFDM signals at different ratio, but also ensure information security of users implementing encryption on physical layer. key space scheme is up to <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math...

This letter proposes and experimentally demonstrates an orthogonal frequency division multiplexing wavelength passive optical network (OFDM-WDM-PON) system based on novel chaotic set-partitioned selective mapping (SP-SLM) scheme. With the implementation of a three-dimensional system, peak-to-average power ratio (PAPR) reduction encryption are simultaneously realized process OFDM signal modulation, so as to enhance performance in presence PAPR, bit error rate (BER), fiber nonlinear tolerance...

An optical fiber sensor based on the parallel Vernier effect for temperature and transverse load measurement is reported in this paper. The composed of a novel compact Michelson interferometer (MI) closed-cavity Fabry–Perot (FPI) connected parallel. MI consists bent single-mode (SMF) structure short length hollow core silicon tube (HCST). A section HCST fused between two segments SMF to form FPI. Two sensors can easily measure different physical parameters independently, thus realizing...

This study aims to present a non-orthogonal multiple access (NOMA) security scheme based on constellation camouflage and selective mapping. To improve the of system, we use four-dimensional chaos model high-power signals at transmitter. The diagram high power is disguised from binary phase-shift keying (BPSK) form quadrature (QPSK) form, after multiplexing, further camouflaged 8 points 16 points. transmission performance designed system as much possible not increase computational complexity,...

In this paper, a power sparse code division non-orthogonal multiple access (PSCD-NOMA) scheme is proposed for next-generation flexible optical access, which based on the multi-stack network. All network units (ONUs) are allocated with different levels according to path loss achieve multiplexing. Compared (SCMA), considers users' information as whole, and larger number of users can be implemented relatively low complexity similar or better performance. It 150% overload by code. Moreover, an...

We propose a high-security hyperchaotic orthogonal frequency division multiplexing (OFDM) encryption scheme based on the orbital angular momentum system, and our research focuses security high-order modulation of (OAM)system. In order to effectively prevent violent decryption by eavesdroppers, we adopt high Zhan's model. experiments, performance proposed is verified OAM optical transmission platform, has large key space 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper proposes a three-dimensional power sparse code division non-orthogonal multiple access (3D-PSCD-NOMA) scheme with 3D constellation pair mapping. The proposed is based on balanced incomplete block design (BIBD). Its correlation matrix performs the overall signal mapping of multi-user information. Power multiplexing realized by overlaying multi-level signals different path losses through Compared conventional 2D standard square 32 Quadrature Amplitude Modulation (QAM), can improve...

In this paper, a flexible physical security coding scheme integrating chaotic neural network (CNN) and non-linear encryption is proposed for orthogonal frequency division multiplexing wavelength passive optical (OFDM-WDM-PON). The improved the flexibility, adjustability key space of system by introducing chaos into networks. will encrypt bit series, probability shaping points, subcarriers position OFDM signal through linear concurrently. Results show that sensitivity 10 −15 more than 279 can...

This paper proposes an encryption scheme for floating probabilistic shaping orthogonal frequency division multiplexing passive optical networks (FPS-OFDM-PON). Four chaotic sequences are generated by the 4D hyperchaotic model (FPS) and bubble sort scheme. An experiment is conducted to demonstrate transmission of a 70Gb/s (7×10Gb/s) FPS-OFDM-PON signal across 2km weakly coupled 7-core fiber. The keyspace reaches 10120. results show that 1.82 dB gain in receiver sensitivity compared with...

A mode division multiplexing (MDM) chaotic encryption scheme based on key intertwining and accompanying transmission is proposed in this paper. Based the weakly coupled few-mode fiber (FMF), data time-varying keys can be accompanied by two modes, LP01 LP11, respectively. In order to generate a new key, current XORed with all of from preceding moments, one one. To implement masking digital domain, three sequences corresponding are adopted encrypt at constellation phase, symbol block,...

In this paper, an improved scheme of orthogonal chirp multiplexing (OCDM) system for the passive optical network (PON) is proposed, which adopts a three-dimensional (3D) constellation and two-dimensional inverse discrete Fresnel transform (2D-IDFnT). The 3D signal in time domain are encrypted by 6D Duffing-Lu chaotic system. Transmission 10.3Gb/s 3D-OCDM successfully demonstrated on 2km 7-core fiber. Compare with 2D-OCDM 3D-OFDM, transmission performance proposed much higher than them. When...

In this paper, an intelligent dynamic perturbation orthogonal chirp division multiplexing (OCDM) encryption scheme based on cellular neural network and biological genetic encoding for seven-core optical fiber is proposed the first time to our knowledge. scheme, chaotic sequences generated by are employed construct six masking vectors achieve dimensions of ultra-high security encryption. The transmitted bit data interleaved according DNA operation rules. subcarrier frequency, symbol matrix,...

In this paper, transmission of orthogonal chirp division multiplexing (OCDM) based on asymmetric pair mapping over a seven core fiber is proposed. High-order 32 quadrature amplitude modulation (QAM) reduced to phase-shift keying (QPSK) and 8 QAM signal employing mapping, which will not affect the rate system. Combined with geometric shaping (GS), average power successfully lowered, realizing damage suppression. order verify performance proposed scheme, 140 Gb/s OCDM 2 km experimentally...

This publisher's note contains corrections to Opt. Lett.48, 4101 (2023)10.1364/OL.493540.

We propose a novel security-enhanced power division multiplexing (SPDM) optical non-orthogonal multiple access scheme in conjunction with seven-core fiber this paper. This could improve the security of data transmission at physical layer and split ratio network, ensuring more users can be served same time. Additionally, signals superimposed digital domain, leading to significant improvement spectral efficiency. have further experimentally demonstrated 47.25 Gb/s SPDM orthogonal frequency...

A high security SCMA encryption scheme based on codebook and frequency masking in seven core fiber was proposed. The 7D cellular neural network (CNN) is used for carrier encryption. experimental results show that the proposed signal will not lead to significant degradation it can effectively ensure safety performance of system.