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IEEE/CIC International Conference on Communications in China (ICCC)

作者： Xia, Yuhan Zhang, Xin Qin, Xiaohan Zhang, Zitian Zhang, Yu Ma, Ting Zhou, Haibo Nanjing Univ Sch Elect Sci & Engn Nanjing Peoples R China Zhejiang Gongshang Univ Sch Informat & Elect Engn Hangzhou 310018 Peoples R China Topxgun Robot Co Ltd Nanjing Peoples R China Nanjing Univ Sci & Technol Sch Elect & Opt Engn Nanjing Peoples R China

ISBN: (纸本)9798350378412

Low-earth-orbit (LEO) satellite-terrestrial network (LSTN) is expected to play a significant role in the next-generation wireless networks (6G), providing global coverage and facilitating various 6G applications. However, the high dynamics of channel state information (CSI) in LSTN have posed challenges to modulation and coding schemes (MCS), which adversely affects the correctness of data transmission and the quality of service (QoS) expected by users. To enhance the communication reliability of LSTN, in this paper, we investigate the adaptive coding and modulation (ACM) method under the digital video broadcasting (DVB) standards. We first establish a channel model and then introduce an ACM method involving channel state estimation, channel state prediction, and MCS switching. Subsequently, the least squares (LS) algorithm is leveraged for channel estimation and we propose an ARIMA-Bidirectional Long Short-Term Memory (AB-LSTM) algorithm specifically for forecasting time-series signal-to-noise ratio (SNR) values for precise channel prediction. Then MCS switching is conducted based on the predicted SNR and switching threshold based on DVB standards. We conduct extensive simulations to show that our proposed algorithms can achieve higher estimation and prediction accuracy, and the introduced ACM method can effectively optimize the usage of channel capacity.

关键词： LEO satellite-terrestrial network adaptive coding and modulation DVB modulation and coding scheme

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adaptive coding and modulation for Robust Optical Access Networks

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JOURNAL OF LIGHTWAVE TECHNOLOGY 2020年第8期38卷 2242-2252页

作者： Chou, Elaine S. Kahn, Joseph M. Stanford Univ Dept Elect Engn EL Ginzton Lab Stanford CA 94305 USA

We introduce adaptive coding and modulation (ACM) to direct-detection passive optical networks (PONs) operating beyond 10 Gb/s per wavelength to allow each user to transmit at the highest possible bit rate and improve network reliability. Current fixed-rate PONs must allocate significant power margin to ensure reliable long-term operation over channels that vary over time and between users. Introducing adaptive-rate transceivers with ACM is a promising low-cost solution to increasing the overall capacity of optical access networks. The proposed ACM scheme uses two-, three-, or four-level pulse-amplitude modulation (2-, 3-, or 4-PAM) at a fixed symbol rate with direct detection and low-density parity check (LDPC) codes derived from a mother code by shortening and puncturing, decoded using fixed-initialization normalized min-sum decoding. The scheme supports received optical powers spanning a 10-dB range at bit rates of 20-54 Gb/s. In a PON with 64 users transmitting at a symbol rate of 30 Gbaud and a maximum transmission distance of 25 km, the ACM scheme demonstrates more than 3 dB improvement in overall optical power budget. For a fixed margin, ACM can increase throughput up to 60% compared to fixed-rate transmission, from 25 Gb/s to 39.7 Gb/s, or from 37.5 Gb/s to over 50 Gb/s, depending on the received optical power.

关键词： adaptive coding and modulation direct detection information rates optical fiber communication time division multiaccess

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adaptive coding and modulation (ACM) and power control scheme for return link of DVB-RCS2 satellite system 37

Adaptive coding and modulation (ACM) and power control schem...

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37th International Communications Satellite Systems Conference (ICSSC)

作者： Jung, Dong-Hyun Shin, Min-Su Ryu, Joon-Gyu Elect & Telecommun Res Inst ETRI Satellite Wide Area Infra Res Sect Daejeon South Korea

ISBN: (纸本)9781839531460;9781839531453

In this chapter, we investigate a DVB-RCS2-based satellite communication system consisting of a gateway, a satellite, and a return channel satellite terminal (RCST). We formulate an optimization problem to maximize the transmission rate of the system. To solve the problem, we propose an adaptive coding and modulation (ACM) and power control scheme for return link transmission based on the return channel condition and power headroom of the RCST. Simulation results show that the proposed ACM and power control scheme increases the transmission rate as the transmit power of RCST and satellite increases or the power headroom of RCST increases.

关键词： satellite communication DVB-RCS2 satellite system adaptive coding and modulation transmit power control dynamic rate adaptation

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Service Provider Agnostic adaptive coding and modulation System Design

Service Provider Agnostic Adaptive Coding and Modulation Sys...

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作者： Shadi Zogheib Ethan Schweinsberg Matthew Hilts Adam Gannon

Commercial service providers (CSPs) are increasingly used to provide communications services to near-Earth science and exploration missions. CSPs commonly utilize modems that are designed to implement adaptive coding and modulation (ACM) in unique ways with modems from the same vendor. However, some missions cannot fly a matching vendor modem, either because the vendor only designs modems for terrestrial use, or the mission needs to fly a software defined radio. We present an ACM system design that allows missions to implement ACM on DVB-S2 compliant CSP links without needing to fly a modem from the same vendor the CSP uses. We implement and test our design in an emulated communications testbed. These tests demonstrate that our ACM system design can successfully adapt to link quality changes up to 6.12 dB/second.

关键词： adaptive coding and modulation interoperability commercial service provider ACM Satellite

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Standardization on performance objectives of satellite systems using adaptive coding and modulation

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING 2020年第2期38卷 200-208页

作者： Kim, Sooyoung Oh, Daesub Park, Jongmin Chonbuk Natl Univ IT Convergence Res Ctr Div Elect Engn Jeonju 54896 South Korea ETRI Radio & Satellite Res Div Daejeon South Korea

The radiocommunication part of the International Telecommunication Union (ITU-R) establishes the standards for wireless communications. Recommendation ITU-R S.1062 specifies the performance objectives for satellite communication systems providing constant bit rate service. However, this is not applicable to most modern satellite communication systems utilizing adaptive coding and modulation (ACM) schemes to compensate for channel impairments, especially for systems operating in high frequency bands. For this reason, ITU-R recently developed Recommendation ITU-R S.2131 that is suitable for satellite systems with ACM. The developed Recommendation provides a method to determine performance objectives for satellite systems using ACM. Two possible objective parameters are presented, including packet error rate and spectral efficiency. This paper presents the standardization process, and the background used to establish new performance objectives. In addition, interpretations of the objectives are given by using estimation results for two different propagation characteristics.

关键词： adaptive coding and modulation ITU-R performance objectives satellite communications standardization

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FPGA Based Transmitter Design Using adaptive coding and modulation Schemes for Low Earth Orbit Satellite Communications 5

FPGA Based Transmitter Design Using Adaptive Coding and Modu...

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5th IEEE International Symposium on Telecommunication Technologies (ISTT)

作者： Inceoz, Erkan Tutgun, Rasit Turgut, Ayse Melda Yuksel TOBB Univ Econ & Technol Elect & Elect Engn Ankara Turkey Sci & Technol Res Council Turkey Space Technol Res Inst Ankara Turkey

ISBN: (纸本)9781728181615

In this study, a field-programmable gate array (FPGA) based high rate transmitter is developed for low earth orbit satellite communication links using adaptive coding and modulation (ACM) techniques. The developed transmitter structure is modeled in MATLAB. Then, the MATLAB model is taken as reference for developing an FPGA design. This design is implemented on Xilinx Kintex Ultrascale XCKU060 FPGA which provides high performance and whose space grade model will be on product line in December 2020. It is shown that the developed transmitter structure can reach a spectral efficiency of 7.068 bits per second per Hertz (bps/Hz) with a code rate of 0.8889 in the highest rate mode. The implemented FPGA design of the transmitter structure can support input data rates from 50.7225 megabits per second (Mbps) to 530.1 Mbps with a baud rate of 75 mega symbol per second (Msps) and a sampling rate of 300 mega sample per second (MSps) at the output.

关键词： low earth orbit satellite communications LEO adaptive coding and modulation ACM CCSDS 131.2-B-1 MATLAB FPGA

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adaptive coding and modulation for Large-Scale Antenna Array-Based Aeronautical Communications in the Presence of Co-Channel Interference

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IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2018年第2期17卷 1343-1357页

作者： Zhang, Jiankang Chen, Sheng Maunder, Robert G. Zhang, Rong Hanzo, Lajos Univ Southampton Sch Elect & Comp Sci Southampton SO17 1BJ Hants England Zhengzhou Univ Sch Informat Engn Zhengzhou 450001 Henan Peoples R China King Abdulaziz Univ Jeddah 21589 Saudi Arabia

In order to meet the demands of "Internet above the clouds," we propose a multiple-antenna aided adaptive coding and modulation (ACM) for aeronautical communications. The proposed ACM scheme switches its coding and modulation mode according to the distance between the communicating aircraft, which is readily available with the aid of the airborne radar or the global positioning system. We derive an asymptotic closed-form expression of the signal-to-interference-plus-noise ratio (SINR) as the number of transmitting antennas tends to infinity, in the presence of realistic co-channel interference and channel estimation errors. The achievable transmission rates and the corresponding mode-switching distance-thresholds are readily obtained based on this closed-form SINR formula. Monte-Carlo simulation results are used to validate our theoretical analysis. For the specific example of 32 transmit antennas and four receive antennas communicating at a 5-GHz carrier frequency and using 6-MHz bandwidth, which are reused by multiple other pairs of communicating aircraft, the proposed distance-based ACM is capable of providing as high as 65.928-Mb/s data rate when the communication distance is less than 25 km.

关键词： Aeronautical communication large-scale antenna array Rician channel adaptive coding and modulation precoding

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Regularized Zero-Forcing Precoding-Aided adaptive coding and modulation for Large-Scale Antenna Array-Based Air-to-Air Communications

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IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 2018年第9期36卷 2087-2103页

作者： Zhang, Jiankang Chen, Sheng Maunder, Robert G. Zhang, Rong Hanzo, Lajos Univ Southampton Sch Elect & Comp Sci Southampton SO17 1BJ Hants England King Abdulaziz Univ Jeddah 21589 Saudi Arabia

We propose a regularized zero-forcing transmit precoding (RZF-TPC)-aided and distance-based adaptive coding and modulation (ACM) scheme to support aeronautical communication applications, by exploiting the high spectral efficiency of the large-scale antenna arrays and link adaption. Our RZF-TPC-aided and distance-based ACM scheme switches its mode according to the distance between the communicating aircraft. We derive the closed-form asymptotic signal-to-interference-plus-noise ratio (SINR) expression of the RZF-TPC for the aeronautical channel, which is Rician, relying on a non-centered channel matrix that is dominated by the deterministic line-of-sight component. The effects of both realistic channel estimation errors and of the co-channel interference are considered in the derivation of this approximate closed-form SINR formula. Furthermore, we derive the analytical expression of the optimal regularization parameter that minimizes the mean square detection error. The achievable throughput expression based on our asymptotic approximate SINR formula is then utilized as the design metric for the proposed RZF-TPC-aided and distance-based ACM scheme. Monte-Carlo simulation results are presented for validating our theoretical analysis as well as for investigating the impact of the key system parameters. The simulation results closely match the theoretical results. In the specific example that two communicating aircrafts fly at a typical cruising speed of 920km/h, heading in opposite direction over the distance up to 740km taking a period of about 24 min, the RZF-TPC-aided and distance-based ACM is capable of transmitting a total of 77 GB of data with the aid of 64 transmit antennas and four receive antennas, which is significantly higher than that of our previous eigen-beamforming transmit precoding-aided and distance-based ACM benchmark.

关键词： Aeronautical communication Rician channel large-scale antenna array adaptive coding and modulation transmit precoding regularized zero-forcing precoding

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Analysis and Simulation of adaptive coding and modulation for Remote Sensing Satellite 3

Analysis and Simulation of Adaptive Coding and Modulation fo...

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3rd IEEE Advanced Information Technology, Electronic and Automation Control Conference (IAEAC)

作者： Wang, Yuyin Zhang, Qilin Zhang, Meili Wang, Linchun 61336 PLA Troops Taiyuan Shanxi Peoples R China 66325 PLA Troops Taiyuan Shanxi Peoples R China Taiyuan Univ Technol Coll Econ & Management Taiyuan Shanxi Peoples R China Small & Medium Enterprises Rights Serv Ctr Shanxi Taiyuan Shanxi Peoples R China

ISBN: (纸本)9781538645093

In order to meet the high-speed downlink data transmission requirements of medium and low-orbit remote sensing satellites, higher spectrum efficiency is achieved under limited frequency band resources. This paper proposes an adaptive coding and modulation technique aiming at the problem of waste of link margin in the traditional data transmission mode. It can realize full utilization of link margin and improve spectrum efficiency under the premise of reliable transmission. Through link calculation and simulation verification, the spectrum utilization rate of the remote sensing data transmission under adaptive mode is 1.8 times that of the traditional constant coding and modulation mode.

关键词： remote sensing staellite adaptive coding and modulation link margin

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Maximizing System Capacity Using adaptive coding and modulation Techniques for Slowly Fading Channels 19

Maximizing System Capacity Using Adaptive Coding and Modulat...

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19th IEEE UKSim-AMSS International Conference on Mathematical Modelling and Computer Simulation (UKSim)

作者： Alawwad, Faisal M. Al-Zahrani, Yousef A. Behairy, Hatim M. King Abdulaziz City Sci & Technol Natl Ctr Elect & Photon Technol Riyadh 11442 Saudi Arabia

ISBN: (纸本)9781538627358

in this paper, an adaptive coding and modulation (ACM) technique is introduced in an attempt to maximize the channel throughout. This technique suggests five different pairs of coding and modulation techniques, starting from low modulation orders and code rates going through higher values. Simulation over additive white Gaussian noise (AWGN) of the physical layer of the system is performed using M-phase shift keying (M-PSK) modulation and convolutional codes with soft Viterbi decoding algorithm. In addition, the channel throughput for each modulation and coding pair is obtained using specific packet retransmission mechanism. An algorithm for adaptive coding and modulation is developed and the overall throughout of the adaptive system is determined with respect to the received E-b/N-o values.

关键词： component Link Adaption adaptive coding and modulation Wireless Communications Viterbi Decoding Algorithm

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