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Автор: Grafiati

Опубліковано: 14 березня 2023

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1

Yonis, Aws Zuheer, and Khalid Khalil Mohammed. "Investigation of pattern division multiple access technique in wireless communication networks." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 1 (April 1, 2022): 296. http://dx.doi.org/10.11591/ijeecs.v26.i1.pp296-303.

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Recently, <span>pattern division multiple access (PDMA) is a non-orthogonal multiple access system that is now being developed in next-generation telecoms to address the requirement for mass connectivity. The core premise of non-orthogonal multiple access is to simultaneously serve multiple users with varying power levels across the same spectrum resources such as time, frequency, code, as well as space with minimal inter-user interference. A simulation analysis of significant technology enhancements focusing on PDMA aims to describe the benefits of the two plans now being examined by the third-generation partnership project for 5G technologies, namely filtered orthogonal frequency division multiplexing (F-OFDM) and windowed orthogonal frequency division multiplexing (W-OFDM), and to compare them to alternative modulation processes such as 16, 32, and 128 modulations. The research results explained the PDMA is less bit error rate used in multiple access technologies compare with W-OFDM and F-OFDM.</span>

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2

Ahmed, Abu Shakil, Husam Al-amaireh, and Zsolt Kollar. "Multicarrier Modulation Schemes for 5G Wireless Access." ECTI Transactions on Computer and Information Technology (ECTI-CIT) 16, no. 4 (September 24, 2022): 378–92. http://dx.doi.org/10.37936/ecti-cit.2022164.248710.

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The 5G wireless access technology will supersede its predecessor, 4G, in the current decade, at first coexisting with it and later as a standalone technology. This work examines and compares the performance of the following orthogonal multicarrier schemes: Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM), Windowed Orthogonal Frequency Division Multiplexing (W-OFDM), Filtered Orthogonal Frequency Division Multiplexing (F-OFDM), Universal Filtered Multi-Carrier (UFMC), and Filter Bank Multi-Carrier (FBMC). The system architecture of each scheme is investigated while considering the performance in fading channel models. The simulation was performed using a standard set of parameters, and the performance was appraised based on Power Spectral Density (PSD), Peak to Average Power Ratio (PAPR), Complementary Cumulative Distribution Function (CCDF) of PAPR, Bit Error Rate (BER), and Signal to Noise Ratio (SNR). In addition, a comprehensive analysis is presented concerning filter or window implementation, filtering method, orthogonality, roll-off rate, spectral leakage, spectral efficiency, computational complexity, and runtime complexity. Based on the results, each scheme has its advantages and disadvantages compared with the other methods. FBMC, F-OFDM, and W-OFDM are preferred for better spectrum utilization, transmission accuracy, and power efficiency, respectively. UFMC offers a fine balance between these multicarrier schemes. Therefore, the modulation scheme for the future physical layer will strongly depend on the requirements.

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3

Ali, Adnan Hussein, Alaa Desher Farhood, and Maham Kamil Naji. "Analysis of a framework implementation of the transceiver performances for integrating optical technologies and wireless LAN based on OFDM-RoF." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 4 (August 1, 2020): 4252. http://dx.doi.org/10.11591/ijece.v10i4.pp4252-4260.

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The greatest advantages of optical fibers are the possibility of extending data rate transmission and propagation distances. Being a multi-carrier technique, the orthogonal frequency division multiplexing (OFDM) can be applicable in hybrid optical-wireless systems design owing to its best spectral efficiency for the interferences of radio frequency (RF) and minor multi-path distortion. An optical OFDM-RoF-based wireless local area network (W-LAN) system has been studied and evaluated in this work. The outline for integrating an optical technology and wireless in a single system was provided with the existence of OFDM-RoF technology and the microstrip patch antenna; these were applied in the Optisystem communication tool. The design of the proposed OFDM-RoF system is aimed at supporting mm-wave services and multi-standard operations. The proposed system can operate on different RF bands using different modulation schemes like 4,16 and 64QAM, that may be associated to OFDM and multidata rates up to 5 Gbps. The results demonstrate the robustness of the integrated optical wireless link in propagating OFDM-RoF-based WLAN signals across optical fibers.

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4

Kotrys, Robert. "ITERACYJNY ODBIÓR MULTI-SYMBOLI OFDM W SIECIACH WLAN." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 4 (April 5, 2015): 266–69. http://dx.doi.org/10.15199/59.2015.4.66.

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5

Mozoła, Piotr. "ANALIZA WŁASNOŚCI WYBRANYCH MODELI KOREKTORÓW W ODBIORNIKU OFDM." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 4 (April 5, 2015): 314–17. http://dx.doi.org/10.15199/59.2015.4.78.

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6

Idrees, Nazar Muhammad, Zijie Lu, Muhammad Saqlain, Hongqi Zhang, Shiwei Wang, Lu Zhang, and Xianbin Yu. "A W-Band Communication and Sensing Convergence System Enabled by Single OFDM Waveform." Micromachines 13, no. 2 (February 17, 2022): 312. http://dx.doi.org/10.3390/mi13020312.

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Анотація:

Convergence of communication and sensing is highly desirable for future wireless systems. This paper presents a converged millimeter-wave system using a single orthogonal frequency division multiplexing (OFDM) waveform and proposes a novel method, based on the zero-delay shift for the received echoes, to extend the sensing range beyond the cyclic prefix interval (CPI). Both simulation and proof-of-concept experiments evaluate the performance of the proposed system at 97 GHz. The experiment uses a W-band heterodyne structure to transmit/receive an OFDM waveform featuring 3.9 GHz bandwidth with quadrature amplitude modulation (16-QAM). The proposed approach successfully achieves a range resolution of 0.042 m and a speed resolution of 0.79 m/s with an extended range, which agree well with the simulation. Meanwhile, based on the same OFDM waveform, it also achieves a bit-error-rate (BER) 10−2, below the forward error-correction threshold. Our proposed system is expected to be a significant step forward for future wireless convergence applications.

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7

An, Changyoung, Byeongjae Kim, and Heung-Gyoon Ryu. "Design and Performance Evaluation of W-OFDM System for 5G Mobile Communication." Journal of the Institute of Electronics and Information Engineers 54, no. 10 (October 31, 2017): 3–10. http://dx.doi.org/10.5573/ieie.2017.54.10.3.

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8

Bacque, Ludovic, Gregoire Nanfack-Nkondem, Philippe Bouysse, Guillaume Neveux, Jean Michel Nebus, William Rebernak, Luc Lapierre, Denis Barataud, and Raymond Quéré. "Implementation of dynamic bias and digital predistortion to enhance efficiency and linearity in a 100 W RF amplifier with OFDM signal." International Journal of Microwave and Wireless Technologies 1, no. 4 (June 22, 2009): 261–68. http://dx.doi.org/10.1017/s1759078709990195.

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This paper presents a technique that enables both efficiency and linearity enhancements of power amplifiers (PA) used in communication systems. It consists in the implementation of a dynamic bias control combined with digital base-band predistortion. The aim of this paper is to describe a methodology and successive steps of the design procedure to reach optimum performances in terms of power added efficiency (PAE) and linearity. It is here applied to a 100 W wide-band lateral diffused metal oxide semiconductor (LDMOS) push–pull amplifier (50–500 MHz) driven by orthogonal frequency division multiplexing (OFDM) signals. When the amplifier is driven by a continuous wave (CW) signal and operates at a constant 28 V drain bias voltage, it exhibits 100 W output power and 60% PAE. When it is driven by an OFDM signal, a 10 dB output power back-off is necessary to have a −25 dBc adjacent channel power ratio (ACPR) and PAE decreases down to 10%. By properly implementing an envelope tracking bias system, 40 W output power along with 38% PAE and −27 dBc ACPR have been reached. Applying base-band digital predistortion provides additional linearity improvements at high PAE (for only one point PAE lost, a 5 dB improvement is obtained for ACPR).

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9

Idrees, Nazar Muhammad, Zijie Lu, Muhammad Saqlain, Hongqi Zhang, Shiwei Wang, Lu Zhang, and Xianbin Yu. "Improvement in Sensing Accuracy of an OFDM-Based W-Band System." Journal of Communications and Information Networks 7, no. 1 (March 2022): 37–47. http://dx.doi.org/10.23919/jcin.2022.9745480.

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10

Blok, Marek. "KLASYFIKATOR SVM W ZASTOSOWANIU DO SYNCHRONIZACJI SYGNAŁU OFDM ZNIEKSZTAŁCONEGO PRZEZ KANAŁ WIELODROGOWY." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 4 (August 9, 2022): 322–25. http://dx.doi.org/10.15199/59.2022.4.70.

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11

Zamłyńska, Monika. "MODELOWANIE INTERFERENCJI W SYSTEMACH RADIOKOMUNIKACYJNYCH Z TRANSMISJĄ OFDM ZA POMOCĄ PARAMETRÓW STATYSTYCZNYCH." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 4 (August 9, 2022): 402–6. http://dx.doi.org/10.15199/59.2022.4.88.

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12

Wu, Kaiquan, Jing He, Zhihua Zhou, Jing He, and Jin Shi. "Probabilistic Amplitude Shaping for a 64-QAM OFDM W-Band RoF System." IEEE Photonics Technology Letters 31, no. 13 (July 1, 2019): 1076–79. http://dx.doi.org/10.1109/lpt.2019.2917925.

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13

An, Changyoung, and Heung-Gyoon Ryu. "Design and Performance Comparison of W-OFDM Under the Nonlinear HPA Environment." Wireless Personal Communications 98, no. 1 (August 22, 2017): 983–99. http://dx.doi.org/10.1007/s11277-017-4904-x.

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14

Hario P, Fakhriy, Adhi Susanto, I. Wayan Mustika, Sevia M Idrus, and Sholeh Hadi P. "Dithering Analysis in an Orthogonal Frequency Division Multiplexing-Radio over Fiber Link." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 3 (June 1, 2016): 1112. http://dx.doi.org/10.11591/ijece.v6i3.9684.

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Анотація:

Nonlinearity is one major problem broadband communication faced on utilizing the high capacity of optical fibers. That is due to scattering phenomenon, which results in the deviations of wavelengths and energies. The dithering method is applied in the attempt to reduce those scatterings. In this paper, we propose the performance of a dithering technique based new system OFDM-RoF using two modulator scheme and coherent detection to alleviate the characteristics nonlinearity applied on the system. The dithering technique inputs signal externally to the signal processing systems to eliminate the effects of nonlinearity. Here, we report the performance of a dithering technique based on the OFDM-RoF, the results our experiment showed that the applied dithering with 16 QAM modulation can make the system more reliable and increases the power level 1.55% with 193.1 THz, 2% with 100 THz and 1.99% ~ 200 THz, the best condition are with f<sub>d</sub> < f<sub>c</sub>. However, all condition close proximity in the parameters OLP (optical launch power), BER and SER measurement. The result demonstrated a high efficiency and good power in which the OLP operated 6.396 dBm / 4.361 E-3 W~fd 200 THz, 3.578 dBm / 2.279 E-3 W~fd 193.1 THz and 6.420 dBm / 4.3384 E-3 W~100 THz. The best BER value is achieved at 0.33 and SER 0.78 at 5 km~f<sub>d</sub> 100 THz, 0.33 and 0.768 for 10 km~fd 193.1 THz, 0.478 and 0.92 for 50 km~fd 193.1 THz.

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15

Hario P, Fakhriy, Adhi Susanto, I. Wayan Mustika, Sevia M Idrus, and Sholeh Hadi P. "Dithering Analysis in an Orthogonal Frequency Division Multiplexing-Radio over Fiber Link." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 3 (June 1, 2016): 1112. http://dx.doi.org/10.11591/ijece.v6i3.pp1112-1121.

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Анотація:

Nonlinearity is one major problem broadband communication faced on utilizing the high capacity of optical fibers. That is due to scattering phenomenon, which results in the deviations of wavelengths and energies. The dithering method is applied in the attempt to reduce those scatterings. In this paper, we propose the performance of a dithering technique based new system OFDM-RoF using two modulator scheme and coherent detection to alleviate the characteristics nonlinearity applied on the system. The dithering technique inputs signal externally to the signal processing systems to eliminate the effects of nonlinearity. Here, we report the performance of a dithering technique based on the OFDM-RoF, the results our experiment showed that the applied dithering with 16 QAM modulation can make the system more reliable and increases the power level 1.55% with 193.1 THz, 2% with 100 THz and 1.99% ~ 200 THz, the best condition are with f<sub>d</sub> < f<sub>c</sub>. However, all condition close proximity in the parameters OLP (optical launch power), BER and SER measurement. The result demonstrated a high efficiency and good power in which the OLP operated 6.396 dBm / 4.361 E-3 W~fd 200 THz, 3.578 dBm / 2.279 E-3 W~fd 193.1 THz and 6.420 dBm / 4.3384 E-3 W~100 THz. The best BER value is achieved at 0.33 and SER 0.78 at 5 km~f<sub>d</sub> 100 THz, 0.33 and 0.768 for 10 km~fd 193.1 THz, 0.478 and 0.92 for 50 km~fd 193.1 THz.

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16

Wachowiak, Marcin. "WPŁYW NIELINIOWOS ́CI NA JAKOS ́C ́ SYGNAŁU ODBIERANEGO W SYSTEMIE M-MIMO OFDM." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 4 (August 9, 2022): 386–90. http://dx.doi.org/10.15199/59.2022.4.85.

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17

Li, Fan, Xinying Li, Junwen Zhang, Jianjun Yu, and Zizheng Cao. "Fiber-Wireless-Fiber Link for DFT-Spread OFDM Signal Transmission at $W$ -Band." IEEE Photonics Technology Letters 27, no. 12 (June 15, 2015): 1273–76. http://dx.doi.org/10.1109/lpt.2015.2417157.

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18

Zhao, Li, You-Wei Chen, Wen Zhou, Run-Kai Shiu, Shuyi Shen, Yanfei Lu, Jianjun Yu, and Gee-Kung Chang. "Polar Coded OFDM Signal Transmission at the W-Band in Millimeter-Wave System." IEEE Photonics Journal 11, no. 6 (December 2019): 1–6. http://dx.doi.org/10.1109/jphot.2019.2950407.

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19

DUDCZYK, Janusz. "Optymalizacja parametr�w technicznych radiostacji osobistej poprzez zastosowanie modulacji OFDM oraz pasma UHF." ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA 1, no. 4 (April 5, 2014): 79–82. http://dx.doi.org/10.15199/ele-2014-019.

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20

Shashidhara, K. S., and H. C. Srinivasaiah. "Hardware co-simulation of 1024-point FFT and it's Implementation, in Simulink, Xilinx Vivado IDE on Zynq-7000 FPGA." European Journal of Engineering Research and Science 4, no. 9 (September 15, 2019): 58–64. http://dx.doi.org/10.24018/ejers.2019.4.9.1501.

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In this paper a 1024-point FFT Algorithm is implemented on Zynq-7000 FPGA device. The design implementation uses Hardware co-simulation in Simulink and Xilinx Vivado environments with Zynq-7000 FPGA target evaluation board using JTAG setup. The power parameter for the configured FFT IP core for 1024 point and the signal source DDS block are estimated. The DDS with both sine and cosine signal outputs enabled, consume a power of 0.277 W, whereas, the 1024 point FFT core consume a power of 0.044 W. Further when 2 DDSs were instanced to generate orthogonal sine and cosine sources for OFDM signals of same frequency 1MHz each, a total of 0.277W power is consumed. When a single DDS core is configured for both sine or cosine signal only configuration by instancing a 1024-point FFT core the total power consumed is 0.268W and 0.267W, respectively, a 1mW higher to cosine case. Further, when 1024 point FFT core power alone is calculated it is found to be 0.044W (or 44mW). When a single DDS is instanced for OFDM signal generation by opting both the sine cosine signals, it consumed a total power of 0.233 W saving a power of 0.044W or 44mW by sine or cosine data re-use from the LUT ROM of DDS. Thus saving a power of 44mW by using data re-use through LUT’s of DDS. This is a significant power saving. In this, hardware co-simulation process, Xilinx system generator tool (Sysgen) is used. This implementation is coded using Verilog HDL, verified on Xilinx Vivado platform on the Zynq-7000 FPGA device. Note that Zynq-7000 is supporting hardware co-simulation, hence the 1024-point FFT has been implemented on this device. The simulation results are captured on Xilinx signal viewer for a proper conclusion.

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21

Shashidhara, K. S., and H. C. Srinivasaiah. "Hardware co-simulation of 1024-point FFT and it's Implementation, in Simulink, Xilinx Vivado IDE on Zynq-7000 FPGA." European Journal of Engineering and Technology Research 4, no. 9 (September 15, 2019): 58–64. http://dx.doi.org/10.24018/ejeng.2019.4.9.1501.

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Анотація:

In this paper a 1024-point FFT Algorithm is implemented on Zynq-7000 FPGA device. The design implementation uses Hardware co-simulation in Simulink and Xilinx Vivado environments with Zynq-7000 FPGA target evaluation board using JTAG setup. The power parameter for the configured FFT IP core for 1024 point and the signal source DDS block are estimated. The DDS with both sine and cosine signal outputs enabled, consume a power of 0.277 W, whereas, the 1024 point FFT core consume a power of 0.044 W. Further when 2 DDSs were instanced to generate orthogonal sine and cosine sources for OFDM signals of same frequency 1MHz each, a total of 0.277W power is consumed. When a single DDS core is configured for both sine or cosine signal only configuration by instancing a 1024-point FFT core the total power consumed is 0.268W and 0.267W, respectively, a 1mW higher to cosine case. Further, when 1024 point FFT core power alone is calculated it is found to be 0.044W (or 44mW). When a single DDS is instanced for OFDM signal generation by opting both the sine cosine signals, it consumed a total power of 0.233 W saving a power of 0.044W or 44mW by sine or cosine data re-use from the LUT ROM of DDS. Thus saving a power of 44mW by using data re-use through LUT’s of DDS. This is a significant power saving. In this, hardware co-simulation process, Xilinx system generator tool (Sysgen) is used. This implementation is coded using Verilog HDL, verified on Xilinx Vivado platform on the Zynq-7000 FPGA device. Note that Zynq-7000 is supporting hardware co-simulation, hence the 1024-point FFT has been implemented on this device. The simulation results are captured on Xilinx signal viewer for a proper conclusion.

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22

Zamłyńska, Monika. "ANALIZA JAKOŚCI TRANSMISJI TREŚCI AUDIO-WIDEO W SYMULOWANYM ŁĄCZU TELEKOMUNIKACYJNYM Z WYKORZYSTANIEM TECHNIKI OFDM." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 4 (August 9, 2022): 129–33. http://dx.doi.org/10.15199/59.2022.4.26.

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23

Lee, Youn-Sung, and Joongjin Kook. "Integrated DVB-X2 Receiver Architecture with Common Acceleration Engine." Applied Sciences 9, no. 19 (September 23, 2019): 3983. http://dx.doi.org/10.3390/app9193983.

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This paper proposes an integrated DVB-X2 receiver architecture to support multi-mode broadcasting standards such as DVB-T2, DVB-C2, and DVB-S2 in a single platform. The entire system consists of a tuner block, a H/W-based receiver engine, a frame processor, and an A/V decoder. Specifically, an integrated architecture to solve key design and technical issues such as reducing the complexity of the receiver, efficiently accessing the H/W-based receiver engine, and simplifying an OFDM demodulator is proposed. The H/W-based receiver engine for DVB-X2 demodulation and channel decoding functions is implemented in two FPGA devices. The frame processor is implemented with 256 MB memory and a DSP operating at a clock speed of 1.0 GHz. To verify functionalities of the proposed DVB-X2 receiver, various test scenarios were considered in the laboratory setting. In particular, the proposed system was tested under various operating modes, as specified in standards such as DVB-T2, DVB-C2, and DVB-S2, and demonstrated successful operations in all test scenarios.

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24

Kim, Kwang Seon, Bong-Su Kim, Min-Soo Kang, Woo-Jin Byun, and Hyung Chul Park. "16-QAM OFDM-Based W-Band Polarization-Division Duplex Communication System with Multi-gigabit Performance." ETRI Journal 36, no. 2 (April 1, 2014): 206–13. http://dx.doi.org/10.4218/etrij.14.2113.0083.

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25

Xiao, Jiangnan, Xinying Li, Yuming Xu, Ziran Zhang, Long Chen, and Jianjun Yu. "W-band OFDM photonic vector signal generation employing a single Mach-Zehnder modulator and precoding." Optics Express 23, no. 18 (September 4, 2015): 24029. http://dx.doi.org/10.1364/oe.23.024029.

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26

Lin, Chun-Ting, Meng-Fan Wu, Chun-Hung Ho, Che-Hao Li, Chi-Hsiang Lin, and Hou-Tzu Huang. "W-band OFDM Radio-over-Fiber system with power detector for vector signal down-conversion." Optics Letters 40, no. 11 (May 19, 2015): 2477. http://dx.doi.org/10.1364/ol.40.002477.

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27

Nguyen, Thuy-Linh, Yasuo Sato та Koichiro Ishibashi. "A 2.77 μW Ambient RF Energy Harvesting Using DTMOS Cross-Coupled Rectifier on 65 nm SOTB and Wide Bandwidth System Design". Electronics 8, № 10 (16 жовтня 2019): 1173. http://dx.doi.org/10.3390/electronics8101173.

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Анотація:

This paper proposes a structure of the μ W RF energy harvesting (RFEH) system that is used for scavenging RF power from an ambient environment. A cross-coupled rectifier (CCR) with floating sub-circuit structures was utilized in the application of dynamic threshold MOSFET (DTMOS) on Silicon on Thin Buried Oxide (SOTB) to obtain high drain conductance of the MOSFET. A wide bandwidth matching between antenna and rectifier was designed to receive energy from the orthogonal frequency division multiplexing (OFDM) RF signal with a bandwidth of 15 MHz at 950 MHz band. Realistic measurements with a 950 MHz LTE mobile phone signal from the ambient environment indicate that an average DC output power of 2.77 μ W is harvested with the proposed RFEH system at a level of −19.4 dBm input power. The proposed RFEH system exhibits the best performance when compared to that of other realistic RFEH systems and is a potential candidate for battery-less Internet of Things (IoT) applications.

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28

Kryszkiewicz, Paweł. "SYNCHRONIZACJA DLA SYSTEMU NC-OFDM ODPORNA NA WPŁYW WĄSKOPASMOWEGO SYGNAŁU INTEREFERUJĄCEGO - OCENA JAKOŚCI W REALIZACJI SPRZĘTOWEJ." PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE 1, no. 8-9 (September 5, 2015): 319–25. http://dx.doi.org/10.15199/59.2015.8-9.43.

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29

Amiri, Iraj Sadegh, Sayed Ehsan Alavi, Sevia M. Idrus, Abu Sahmah Mohd Supaat, Jalil Ali, and Preecha P. Yupapin. "W-Band OFDM Transmission for Radio-Over-Fiber Link Using Solitonic Millimeter Wave Generated by MRR." IEEE Journal of Quantum Electronics 50, no. 8 (August 2014): 622–28. http://dx.doi.org/10.1109/jqe.2014.2331065.

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30

Zhou, Zhihua, Jing He, Yi Liu, Jie Ma, and Yaoqiang Xiao. "Enhanced sampling frequency offset resistance method based on precoding technique in W-band OFDM RoF systems." Optics Communications 467 (July 2020): 125711. http://dx.doi.org/10.1016/j.optcom.2020.125711.

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31

Li, Yu, Jiachen Li, Hongchen Yu, Hai Yu, Hongwei Chen, Sigang Yang, and Minghua Chen. "On-chip photonic microsystem for optical signal processing based on silicon and silicon nitride platforms." Advanced Optical Technologies 7, no. 1-2 (April 25, 2018): 81–101. http://dx.doi.org/10.1515/aot-2017-0057.

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AbstractThe explosive growth of data centers, cloud computing and various smart devices is limited by the current state of microelectronics, both in terms of speed and heat generation. Benefiting from the large bandwidth, promising low power consumption and passive calculation capability, experts believe that the integrated photonics-based signal processing and transmission technologies can break the bottleneck of microelectronics technology. In recent years, integrated photonics has become increasingly reliable and access to the advanced fabrication process has been offered by various foundries. In this paper, we review our recent works on the integrated optical signal processing system. We study three different kinds of on-chip signal processors and use these devices to build microsystems for the fields of microwave photonics, optical communications and spectrum sensing. The microwave photonics front receiver was demonstrated with a signal processing range of a full-band (L-band to W-band). A fully integrated microwave photonics transceiver without the on-chip laser was realized on silicon photonics covering the signal frequency of up 10 GHz. An all-optical orthogonal frequency division multiplexing (OFDM) de-multiplier was also demonstrated and used for an OFDM communication system with the rate of 64 Gbps. Finally, we show our work on the monolithic integrated spectrometer with a high resolution of about 20 pm at the central wavelength of 1550 nm. These proposed on-chip signal processing systems potential applications in the fields of radar, 5G wireless communication, wearable devices and optical access networks.

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32

Xiao, Yaoqiang, Bingshuai Wang, Zhiyi Wang, Zhihua Zhou, and Jing He. "One-time pad scheme based on polar code and OFDM for MMW-RoF system at W-band." Optics Express 30, no. 3 (January 26, 2022): 4412. http://dx.doi.org/10.1364/oe.450878.

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33

Cavalcante, Lucas C. P., Simon Rommel, Rui Dinis, L. G. Q. Silveira Junior, L. F. Q. Silveira, and Idelfonso Tafur Monroy. "Performance Evaluation of Wavelet-Coded OFDM on a 4.9 Gb/s W-Band Radio-Over-Fiber Link." Journal of Lightwave Technology 35, no. 14 (July 15, 2017): 2803–9. http://dx.doi.org/10.1109/jlt.2017.2701358.

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34

Huang, Hou-Tzu, Chun-Ting Lin, Chun-Hung Ho, Wan-Ling Liang, Chia-Chien Wei, Yu-Hsuan Cheng, and Sien Chi. "High spectral efficient W-band OFDM-RoF system with direct-detection by two cascaded single-drive MZMs." Optics Express 21, no. 14 (July 2, 2013): 16615. http://dx.doi.org/10.1364/oe.21.016615.

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35

Alavi, S. E., I. S. Amiri, M. Khalily, N. Fisal, A. S. M. Supa'at, H. Ahmad, and S. M. Idrus. "W-Band OFDM for Radio-over-Fiber Direct-Detection Link Enabled by Frequency Nonupling Optical Up-Conversion." IEEE Photonics Journal 6, no. 6 (December 2014): 1–7. http://dx.doi.org/10.1109/jphot.2014.2366166.

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36

Males-Ilic, Natasa, Aleksandra Djoric, and Aleksandar Atanaskovic. "Linearization of broadband two-way microstrip Doherty amplifier." Facta universitatis - series: Electronics and Energetics 29, no. 1 (2016): 127–38. http://dx.doi.org/10.2298/fuee1601127m.

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The linearization of a broadband two-way microstrip Doherty amplifier designed for application in the frequency range 0.9-1.0 GHz is considered in this paper. The amplifier characterized by the maximum output power 8 W is designed in microstrip technique for broadband applications. For linearization purposes, the second- and fourth-order nonlinear signals are extracted at the output of the peaking cell, adjusted in amplitude and phase and fed at the input and output of the carrier transistor over the microstrip hairpin band-pass filters. The effects of the linearization are considered through the simulation for two sinusoidal signals with different frequency interval between them setting on from 5 MHz and going up to30 MHz at different input power levels up to saturation, as well as for an Orthogonal frequency division multiplexing (OFDM) digitally modulated signal.

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37

Wei, Chia-Chien, Chun-Ting Lin, Hou-Tzu Huang, Wan-Ling Liang, and Sien Chi. "Estimation and Suppression of Dispersion-Induced Phase Noise in W-band Direct-Detection OFDM Radio-Over-Fiber Systems." Journal of Lightwave Technology 32, no. 20 (October 15, 2014): 3874–84. http://dx.doi.org/10.1109/jlt.2014.2322601.

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38

Deng, Rui, Jianjun Yu, Jing He, Ming Chen, Yiran Wei, Li Zhao, Qi Zhang, and Xiangjun Xin. "Twin-SSB-OFDM Transmission Over Heterodyne W-Band Fiber-Wireless System With Real-Time Implementable Blind Carrier Recovery." Journal of Lightwave Technology 36, no. 23 (December 1, 2018): 5562–72. http://dx.doi.org/10.1109/jlt.2018.2876368.

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39

Papathanassiou, A., A. K. Salkintzis, and P. T. Mathiopoulos. "A comparison study of the uplink performance of W-CDMA and OFDM for mobile multimedia communications via LEO satellites." IEEE Personal Communications 8, no. 3 (June 2001): 35–43. http://dx.doi.org/10.1109/98.930095.

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40

Wang, Kaihui, Li Zhao, and Jianjun Yu. "200 Gbit/s Photonics-Aided MMW PS-OFDM Signals Transmission at W-Band Enabled by Hybrid Time-Frequency Domain Equalization." Journal of Lightwave Technology 39, no. 10 (May 15, 2021): 3137–44. http://dx.doi.org/10.1109/jlt.2021.3062387.

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41

Deng, Lei, Xiaodan Pang, Idelfonso Tafur Monroy, Ming Tang, Ping Shum, and Deming Liu. "Experimental Demonstration of Nonlinearity and Phase Noise Tolerant 16-QAM OFDM W-Band (75–110 GHz) Signal Over Fiber System." Journal of Lightwave Technology 32, no. 8 (April 2014): 1442–48. http://dx.doi.org/10.1109/jlt.2014.2307054.

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42

Chen, Long, Jiabin Luo, Zhijun Tang, and Zaifang Xi. "Integration system of photon-assisted W-band millimeter wave wireless communication and free space optical communication based on OFDM signal transmission." Optical Fiber Technology 52 (November 2019): 101973. http://dx.doi.org/10.1016/j.yofte.2019.101973.

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43

Fang, Wei Jin, Xu Guang Huang, Kai Yang, and Xiao Min Zhang. "Transmission of 100 GHz w-band frequency MIMO-OFDM signals with 90 Gbps downstream and 30 Gbps upstream using radio over fiber system." Microwave and Optical Technology Letters 55, no. 1 (November 20, 2012): 93–99. http://dx.doi.org/10.1002/mop.27251.

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44

Krishnareddy, M., Salil Jalali, and D. K. Samuel. "Fruit Distortion Mosaic Disease of Okra in India." Plant Disease 87, no. 11 (November 2003): 1395. http://dx.doi.org/10.1094/pdis.2003.87.11.1395a.

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Okra (Abelmoscus esculentus (L.) Moench) is an important vegetable crop of India and other subropical and tropical countries. In 2000 and 2001, in the states of Karnataka and Tamil Nadu, okra was severely affected by a new disease. Since that time, the disease has spread to other states: Andhra Pradesh, Madhya Pradesh, Haryana, and Maharashtra. Chlorotic spots, chlorotic leaf blotches, distortion of leaves, chlorotic streaking, distortion of fruits, and severe yield losses as much as 63% characterize the disease. The causal virus induces local and systemic chlorotic and necrotic lesions on Vigna unguiculata (L.) Walp. cv. C-152 and Chenopodium amaranticolor Coste & Reyne., chlorotic local lesions and mosaic on Cucumis sativus L., necrotic local lesions on Gossypium hirsutum L. and black gram (Vigna mungo L.), and chlorotic local lesions and systemic necrosis on sunflower (Helianthus annuus L.). Host reactions on these species are similar to those described for the ilarvirus Tobacco streak virus (TSV) (3). Electron microscopic observation of leafdip preparations from field samples and partially purified virus preparations revealed the presence of isometric virus particles measuring 25 to 30 nm in diameter. The virus was purified from mechanically inoculated okra by differential and sucrose density gradient centrifugation, and disease symptoms were reproduced in okra mechanically inoculated with the purified virus. In direct antigen coated enzyme-linked immunosorbent assay and immunosorbent electron microscopy tests, the purified virus and sap extracts reacted positively with polyclonal antibodies to TSV, the ilarvirus associated with sunflower necrosis and peanut stem necrosis diseases (1,2), but did not react positively to Turnip mosaic virus and Okra mosaic virus that are previously reported to infect okra. In reverse transcription-polymerase chain reaction (RT-PCR), using oligonucleotide primers designed to amplify the entire coat protein region of TSV, an approximately 800-bp DNA fragment was obtained from purified virus and okra displaying fruit distortion mosaic disease (OFDM) but not from healthy okra. On the basis of host range, serological relationship, electron microscopy, and RTPCR amplification, the virus causing OFDM is an ilarvirus closely related to TSV. To our knowledge, this is the first report of the occurrence of an ilarvirus in okra, and is the third and most recent report of an ilarvirus related to TSV causing disease in crops on the Indian subcontinent (1,2). References:(1). A. I. Bhat et al. Arch. Virol. 147:651, 2002. (2). A. S. Reddy et al. Plant Dis. 86:173, 2002. (3). S. W. Scott. Tobacco streak virus. No 381 in: Descriptions of Plant Viruses. CMI/AAB, Surrey, U.K., 2001.

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Stratakos, Ioannis, Vasileios Leon, Giorgos Armeniakos, George Lentaris, and Dimitrios Soudris. "Design Space Exploration on High-Order QAM Demodulation Circuits: Algorithms, Arithmetic and Approximation Techniques." Electronics 11, no. 1 (December 23, 2021): 39. http://dx.doi.org/10.3390/electronics11010039.

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Every new generation of wireless communication standard aims to improve the overall performance and quality of service (QoS), compared to the previous generations. Increased data rates, numbers and capabilities of connected devices, new applications, and higher data volume transfers are some of the key parameters that are of interest. To satisfy these increased requirements, the synergy between wireless technologies and optical transport will dominate the 5G network topologies. This work focuses on a fundamental digital function in an orthogonal frequency-division multiplexing (OFDM) baseband transceiver architecture and aims at improving the throughput and circuit complexity of this function. Specifically, we consider the high-order QAM demodulation and apply approximation techniques to achieve our goals. We adopt approximate computing as a design strategy to exploit the error resiliency of the QAM function and deliver significant gains in terms of critical performance metrics. Particularly, we take into consideration and explore four demodulation algorithms and develop accurate floating- and fixed-point circuits in VHDL. In addition, we further explore the effects of introducing approximate arithmetic components. For our test case, we consider 64-QAM demodulators, and the results suggest that the most promising design provides bit error rates (BER) ranging from 10−1 to 10−4 for SNR 0–14 dB in terms of accuracy. Targeting a Xilinx Zynq Ultrascale+ ZCU106 (XCZU7EV) FPGA device, the approximate circuits achieve up to 98% reduction in LUT utilization, compared to the accurate floating-point model of the same algorithm, and up to a 122% increase in operating frequency. In terms of power consumption, our most efficient circuit configurations consume 0.6–1.1 W when operating at their maximum clock frequency. Our results show that if the objective is to achieve high accuracy in terms of BER, the prevailing solution is the approximate LLR algorithm configured with fixed-point arithmetic and 8-bit truncation, providing 81% decrease in LUTs and 13% increase in frequency and sustains a throughput of 323 Msamples/s.

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46

Lin, Yu-Chien, Ta-Sung Lee, and Chia-Hung Lin. "Interference avoidance and cancellation in automotive OFDM radar networks." Journal of Signal Processing Systems 92, no. 12 (July 10, 2020): 1383–96. http://dx.doi.org/10.1007/s11265-020-01539-w.

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47

Aulaskari, Rauno, and Hasi Wulan. "Outer functions inQp#, Qp,0#." Journal of Function Spaces and Applications 2, no. 1 (2004): 17–24. http://dx.doi.org/10.1155/2004/493269.

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For0<p<∞, Qp# (Qp,0#)is the class of meromorphic functionsfdefined in the unit diskD={z:|z|<1}satisfyingsup⁡w∈D∬D(f#(z))2gp(z,w)dσz<∞ (lim⁡w→∂D∬D(f#(z))2gp(z,w)dσz=0), whereg(z,w)is Green's function ofD. Criteria for funtionsfto belong toQp# (Qp,0#)are given by the Ahlfors-Shimizu characteristic. Further, outer functions inQp# (Qp,0#)are characterized and shown that every function inQp# (Qp,0#)can be represented as the quotient of two functions inH∞∩Qp# (H∞∩Qp,0#).

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48

Kohli, Amit Kumar, and Divneet Singh Kapoor. "BER Performance of SFBC–OFDM Systems Working Over Fading Channels Under Impulsive Environment." Arabian Journal for Science and Engineering 45, no. 3 (November 18, 2019): 1749–63. http://dx.doi.org/10.1007/s13369-019-04230-w.

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49

Kapoor, Divneet Singh, and Amit Kumar Kohli. "Adaptive-Slope Squashing-Function-Based ANN for CSI Estimation and Symbol Detection in SFBC-OFDM System." Arabian Journal for Science and Engineering 46, no. 10 (January 23, 2021): 9451–64. http://dx.doi.org/10.1007/s13369-020-05207-w.

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50

Thangaraj, Cynthia Anbuselvi, and T. Aruna. "Energy-Efficient Power Allocation with Guaranteed QoS Under Imperfect Sensing for OFDM-Based Heterogeneous Cognitive Radio Networks." Wireless Personal Communications 109, no. 3 (August 21, 2019): 1845–62. http://dx.doi.org/10.1007/s11277-019-06655-w.

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