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Journal articles on the topic 'Polarization division multiple access (PDMA)'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Do, Dinh-Thuan, Minh-Sang Van Nguyen, Thi-Anh Hoang, and Byung Moo Lee. "Exploiting Joint Base Station Equipped Multiple Antenna and Full-Duplex D2D Users in Power Domain Division Based Multiple Access Networks." Sensors 19, no. 11 (May 30, 2019): 2475. http://dx.doi.org/10.3390/s19112475.

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In this paper, we investigate power domain division-based multiple access (PDMA) to support the base stations (BS) equipped with multiple antennas to serve mobile users. Such a system deploys multiple input single output (MISO)-based wireless transmission and a full-duplex (FD) scheme. Furthermore, such MISO PDMA system consists of BS employing transmit antenna selection to reduce complexity in signal processing at the receivers. We distinguish two kinds of mobile users, device-to-device (D2D) users and traditional users. In such MISO PDMA, there exists a trade-off between outage performance of each PDMA user and power allocation factors. Since the implementation of the FD scheme at PDMA users, bandwidth efficiency will be enhanced despite the existence of self-interference related to such FD. In particular, exact expressions of outage probability are derived to exhibit system performance with respect to D2D users. Finally, valuable results from the simulated parameters together with the analytical results show that MISO PDMA can improve its performance by increasing the number of transmit antennas at the BS.

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2

Tang, Wanwei, Shaoli Kang, Bin Ren, and Xinwei Yue. "Uplink grant-free pattern division multiple access (GF-PDMA) for 5G radio access." China Communications 15, no. 4 (April 2018): 153–63. http://dx.doi.org/10.1109/cc.2018.8357693.

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3

Zhang, Xiurong, Shaoli Kang, and Xueqian Fu. "Optimal Power Allocation for Cooperative Pattern Division Multiple Access Systems." Mathematical Problems in Engineering 2021 (February 26, 2021): 1–10. http://dx.doi.org/10.1155/2021/5581811.

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This study focuses on the power allocation (PA) problem in code division multiple access (PDMA) networks with amplify-and-forward (AF) relays. We provide two wireless communication technical performance indexes, which are system throughput and outage probability. A multiobjective version of particle swarm optimization is proposed to solve Pareto-optimal solutions for optimal PA problems. A novel programming model is built based on improvement of constraint functions, and the accuracy and efficiency of solution can be improved via compact constraints. The technique for order preference by similarity to an ideal solution is proposed to balance the performance indicators, which include outage probability and system throughput. It has been calculated that the proposed approach for optimal PA is verified and performs better than a genetic algorithm approach.

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4

Tang, Wanwei, Shaoli Kang, and Bin Ren. "Performance Analysis of Cooperative Pattern Division Multiple Access (Co-PDMA) in Uplink Network." IEEE Access 5 (2017): 3860–68. http://dx.doi.org/10.1109/access.2017.2683531.

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5

Huang, Jen-Fa. "Polarization diversity scheme on spectral polarization coding optical code-division multiple-access network." Optical Engineering 49, no. 12 (December 1, 2010): 125005. http://dx.doi.org/10.1117/1.3526335.

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6

Naher, Afrin. "Color Image Transmission in SPC Channel Encoded Multiuser 5G Compatible Pattern Division Multiple Access (PDMA) Wireless Communication System." Advances in Wireless Communications and Networks 4, no. 1 (2018): 17. http://dx.doi.org/10.11648/j.awcn.20180401.14.

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7

Tarhuni, N., T. Korhonen, and M. Elmusrati. "State-of-polarization Encoding for Optical Code-Division Multiple-Access Networks." Journal of Electromagnetic Waves and Applications 21, no. 10 (January 1, 2007): 1313–21. http://dx.doi.org/10.1163/156939307783239492.

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8

Kwon, Seok-Chul, and Gordon L. Stuber. "Polarization Division Multiple Access on NLoS Wide-Band Wireless Fading Channels." IEEE Transactions on Wireless Communications 13, no. 7 (July 2014): 3726–37. http://dx.doi.org/10.1109/twc.2014.2314118.

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9

Yen, Chih Ta, and Chia Yu Liu. "Hybrid Analog/Digital Modulations Using Polarization Multiplexing OCDMA Scheme in Free Space Optics." Applied Mechanics and Materials 764-765 (May 2015): 511–14. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.511.

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With the development of the Internet, how to provide a high-speed and high-security comprehensive network has become urgent issue. In this project, we propose hybrid analog/digital transmissions format scheme which integrated optical code-division multiple-access (OCDMA) and polarization multiplexing technique in free space optics (FSO) transmission. Orthogonal frequency division multiplexing (OFDM) transmits as the analog format and (on-off keying) OOK transmits as digital format in the study, respectively. In the proposed hybrid OCDMA system, it has high-speed transmission, signal security and low cost...etc. we adopt quasi-orthogonal Walsh-Hadamard codes (WHC) that with fixed cross correlation value as the codeword for each base station. With the property, the multiple access interference (MAI) can be efficiently eliminated by using the balanced detection scheme at the receive end. The constellation and eye diagrams show that both OFDM signal as analog signal and OOK modulation as digital signal in the proposed hybrid OCDMA system perform good performance in FSO transmission.

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10

Gao, Kaiqiang, Chongqing Wu, Xinzhi Sheng, Chao Shang, Lanlan Liu, and Jian Wang. "Optical code division multiple access secure communications systems with rapid reconfigurable polarization shift key user code." Optical Engineering 54, no. 9 (September 1, 2015): 096101. http://dx.doi.org/10.1117/1.oe.54.9.096101.

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11

Kaushik, Vikas, and Himanshi Saini. "Comparative Examination of CO-OFDM Formats for Varied Fiber-Length and Bit Rate." Journal of University of Shanghai for Science and Technology 23, no. 07 (July 24, 2021): 1058–67. http://dx.doi.org/10.51201/jusst/21/07174.

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The use of multiple carriers in Orthogonal Frequency Division Modulation (OFDM) makes it bandwidth-efficient and suitable for modern communication such as Long-Term Evolution (LTE), Digital Subscriber Line (DSL) internet access, optical fiber communication, digital television, audio broadcasting, etc. In this paper, four modulation formats by using Coherent Optical Orthogonal Frequency Division Modulations (CO-OFDM) have been analyzed. These are Single Port Dual Polarization (SP DP) 16 QAM, Single-Port Single Polarization (SP SP) 16 QAM, Dual Port Single Polarization (DP SP) QPSK 16-QAM, and Single Port Dual Polarization (SP DP) QPSK. Operation characteristics such as Bit Error Rate (BER) versus fiber-length and BER versus bit-rate have been examined. The range of fiber length used for this investigation is from 0 Km to 1000 Km with loop count equal to 2 and the range of bit rate of operation is from 20 Gbps to 200 Gbps. The present investigation helps in determining the relative suitability of CO-OFDM formats at various bit-rates of operation for different fiber lengths.

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12

Wijanto, Eddy, and Chun-Ming Huang. "Design of Bipolar Optical Code-Division Multiple-Access Techniques Using Phase Modulator for Polarization Coding in Wireless Optical Communication." Applied Sciences 11, no. 13 (June 26, 2021): 5955. http://dx.doi.org/10.3390/app11135955.

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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. Various types of noise, such as amplified spontaneous emission (ASE) noise, thermal noise, and shot noise, were included in the simulation to approach the real application. The first simulation, utilizing a modified M-sequence as signature code, demonstrated that the proposed Bi-OCDMA system could be implemented in FSO communication. The proposed Bi-OCDMA scheme improves the transmission rate and power efficiency compared with the previous scheme. The structure of the proposed system alleviates multiple-access interference (MAI) with a simple and cost-effective design. The second simulation observed the performance of the proposed Bi-OCDMA for two users with several well-known SAC codes, i.e., multi-diagonal (MD) code, modified quadratic congruence (MQC) code, modified maximum length sequence (M-sequence) code, and Walsh–Hadamard code, in extreme weather conditions, both for additive white Gaussian noise (AWGN) and turbulence-induced fading channel. The simulation results indicated that the Walsh–Hadamard code has superior performance compared to other codes. The results show the MD code can be implemented in the proposed Bi-OCDMA scheme for a medium-distance FSO.

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13

Eli-Chukwu, N. C., and G. N. Onoh. "Experimental Study on the Impact of Weather Conditions on Wide Code Division Multiple Access Signals in Nigeria." Engineering, Technology & Applied Science Research 9, no. 2 (April 10, 2019): 3998–4001. http://dx.doi.org/10.48084/etasr.2630.

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In cellular network activities, before a site is integrated it is expected that each cell of the site meets the Nigerian Communication Commission (NCC) standard of ≥98% for both service accessibility and call completion rate which in turn depicts a ≤2% in both blocked call rate (BCR) and dropped call rate (DCR). It is suggested that weather conditions have a very strong negative effect on the performance of wideband code division multiple access (WCDMA) network as it could lead to signal attenuation or change the polarization. In this paper, we study the impact of weather conditions on WCDMA network in Nigeria. To achieve this, network samples (log-files) were collected weekly during a driving test in Enugu State Nigeria for a period of five years for both rainy and dry seasons, in which blocked and dropped calls were extracted. Results show that during adverse weather conditions, BCR and DCR rise greater than 8% and 4% respectively. Although with a slight relationship between the weather conditions, the weather condition during the dry season has a better-blocked call rate of 8.76% in comparison with the rainy season with 12.89%. Calls tend to drop more during the dry season. From the outcome of the experiment, a model was developed for predicting an unknown network call statistics variables.

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14

Yen, Chih-Ta, Jen-Fa Huang, and Wen-Zong Zhang. "Hiding Stealth Optical CDMA Signals in Public BPSK Channels for Optical Wireless Communication." Applied Sciences 8, no. 10 (September 25, 2018): 1731. http://dx.doi.org/10.3390/app8101731.

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A new optical steganography scheme is proposed that transmits a stealth optical code-division multiple-access (OCDMA) signal through a public binary phase-shift keying (BPSK) channel. Polarization beam splitters and arrayed waveguide gratings are used to implement a spectral-polarization coding (SPC) system with an incoherent optical source. We employ a Walsh–Hadamard code as the signature code of the user who wants to transmit stealth information using the system. A free space optical link applied to this system maintains the polarization states of light during propagation. The secret data are extracted using correlation detection and balanced subtraction in the OCDMA decoder of the intended receiver, and the other signal from the public channel is reduced by the OCDMA decoder. At the demodulator of the public channel, BPSK demodulation eliminates the stealth signal so that the public channel is not affected by the stealth signal. The two signals cannot interfere with each other. The results of this study show that our proposed optical steganography system is highly secure. The stealth signal can be favorably hidden in the public channel when the average source power of the stealth signal, public noise, and public signal are −5, −3, and 0 dBm, respectively.

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15

Chen, Yinfang, Rong Wang, Tao Fang, Tao Pu, Peng Xiang, Huatao Zhu, and Jilin Zheng. "Stealth transmission of temporal phase en/decoded polarization-modulated-code-shift-keying optical-code-division multiple-access signal over synchronous digital hierarchy network with asynchronous detection." Optical Engineering 53, no. 6 (June 13, 2014): 066103. http://dx.doi.org/10.1117/1.oe.53.6.066103.

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16

"A Multi User based Joint Bit Error Rate Improvements in PDMA." International Journal of Recent Technology and Engineering 8, no. 4 (November 30, 2019): 11043–48. http://dx.doi.org/10.35940/ijrte.d5432.118419.

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The development of mobile Internet and Internet of things (IoT), the 5th generation (5G) wireless communications will foresee explosive increase in mobile traffic. To address challenges in 5Gisuchiasihigherispectraliefficiency,imassive connectivity,iandilowerilatency,isomeiNon-OrthogonaliMultiplei Accessi(NOMA)ischemesihaveibeenirecentlyiactivelyiinvestigated iincludingipower-domainiNOMA,imultipleiaccess with Low-Density Spreading (LDS), Sparse Code Multiple Access (SCMA), Multi-user Shared Access (MUSA), pattern division multiple access (PDMA). Pattern Division Multiple Access is the key technique for analyzing group of users at a time. In this paper we investigate BER performance for 5G systems with different multiple accesses schemes, i.e Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multicarrier (FBMC), Generalized Frequency Division Multiplexing (GFDM),in comparison to these we design a closed form analysis method of Multi-user FDMC technique far better. Simulation results show that MU FDMC performs better than conventional methods.

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17

Li, Shufeng, Baoxin Su, and Libiao Jin. "Research on PDMA communication system based on complete complementary sequence." EURASIP Journal on Wireless Communications and Networking 2020, no. 1 (October 14, 2020). http://dx.doi.org/10.1186/s13638-020-01812-3.

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Abstract Pattern division multiple access (PDMA) is a new non-orthogonal multiple access (NOMA) technology. It is proposed to meet the challenge of 5G large-scale connectivity and high-frequency spectral efficiency. Compared with traditional orthogonal multiple access (OMA), PDMA can support more users through the allocation of non-orthogonal resources. Due to perfect aperiodic correlation, complete complementary sequence (CCS) greatly improves the spectrum efficiency of the system. It has been widely used in wireless communication and radar sensing, and it still has research value in 5G. In order to apply the advantages of CCS to NOMA communication system, this paper proposes a system model of CCS spread spectrum coding based on PDMA. CCS is used as spread spectrum code to improve the performance of PDMA communication system. At the same time, on the basis of spread spectrum technology, this paper analyzes the average power allocation algorithm and water-filling power allocation algorithm, and a dynamic power allocation algorithm based on the transmission rate and practical application is proposed. The simulation results show that the system model can effectively improve the performance of the system.

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18

Cao, Bin, Qin-Yu Zhang, and Lin Jin. "Polarization division multiple access with polarization modulation for LOS wireless communications." EURASIP Journal on Wireless Communications and Networking 2011, no. 1 (August 25, 2011). http://dx.doi.org/10.1186/1687-1499-2011-77.

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19

"Space-Polarization Division Multiple Access System with Limited Feedback." KSII Transactions on Internet and Information Systems 8, no. 4 (April 29, 2014): 1292–306. http://dx.doi.org/10.3837/tiis.2014.04.008.

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20

Betti, S., G. De Marchis, E. Iannone, M. Marcelli, and F. Matera. "Optical Code Division Multiple Access Techniques based on Polarization Modulated Coherent Systems." Journal of Optical Communications 14, no. 5 (January 1993). http://dx.doi.org/10.1515/joc.1993.14.5.183.

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21

"Maximum Ratio Transmission for Space-Polarization Division Multiple Access in Dual-Polarized MIMO System." KSII Transactions on Internet and Information Systems 9, no. 8 (August 31, 2015): 3054–67. http://dx.doi.org/10.3837/tiis.2015.08.017.

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22

"Performance Analysis of MRT-Based Dual-Polarized Massive MIMO System with Space-Polarization Division Multiple Access." KSII Transactions on Internet and Information Systems 12, no. 8 (August 31, 2018). http://dx.doi.org/10.3837/tiis.2018.08.025.

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23

Bharti, Manisha, Ajay K. Sharma, and Manoj Kumar. "Design and Performance Analysis of 2D OCDMA System with Polarization States." Journal of Optical Communications 37, no. 4 (January 1, 2016). http://dx.doi.org/10.1515/joc-2015-0094.

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AbstractThis paper focuses on increasing the number of subscribers in optical code-division multiple access (OCDMA) system by using one of the features of light signal that it can be propagated in two polarization states. The performance of two-dimensional (2D) OCDMA system based on wavelength-time coding scheme by adding polarization state is investigated at varying data rates from 1 GHz to 6 GHz and for various modulation formats. It is reported that with increase in data rate of system, the performance of the system deteriorates due to polarization mode dispersion. Non-return to-zero (RZ), return to-zero (RZ), carrier suppressed return-to-zero (CSRZ) and differential phase shift keying (DPSK) modulation formats are simulated for a single user system with polarization. Investigations reveal that differential phase shift keying (DPSK) modulation format suits best to the proposed system and exhibit the potential to improve the flexibility of system for more number of users. The investigations are reported in terms of Q-factor, BER, received optical power (ROP) and eye diagrams.

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