RIS-IM System Based on Nonorthogonal Multiple Access

doi:10.12141/j.issn.1000-565X.230015

Abstract

Abstract:

Reconfigurable intelligent surface assisted index modulation (RIS-IM) scheme is a developed transmission technology in smart radio environment. However, the current relevant research only considers the direct transmission of M-ary modulation signal to a single user. It is necessary to use multiple access technology to make more users share time-frequency resources in the future scenario of wireless communication connecting massive users. Nonorthogonal multiple access (NOMA) technology uses power domain multiplexing of time-frequency blocks to connect more users and realizes efficient utilization of resources by actively introducing interference. Based on nonorthogonal multiple access, this paper proposed a reconfigurable intelligent surface assisted index modulation system (RIS-IM-NOMA) to realize multi-user access for RIS-IM. The system improves the quality of the received signal using the reconfigurable intelligent surface and at the same time selects the best transmitting antenna to transmit index information in this system. And time-frequency resources are allocated to more users through NOMA and the spectral efficiency is improved. The greedy detection method was used to detect the signal at the receiving end, and the upper bound of the bit error rate was derived and analyzed theoretically. Then an improvement scheme was proposed for the performance decline of bit error rate caused by interuser interference of NOMA. The spectral efficiency of the system was analyzed theoretically, and a power allocation method was proposed to solve the problem of fairness of spectral efficiency among users. The simulation results show that increasing the number of reflecting elements can effectively reduce the bit error rate of the system, and the proposed power allocation method can effectively ensure the fairness of the system. Thus, the effectiveness of the proposed schemes is verified.

Key words: modulation, frequency division multiple access, nonorthogonal multiple access, mobile telecommunication system

CLC Number:

TN92

ZHUANG Ling, HUANG Kai. RIS-IM System Based on Nonorthogonal Multiple Access[J]. Journal of South China University of Technology(Natural Science Edition), 2023, 51(11): 28-34.

Figures/Tables 5

Fig.1

Table 1

Theoretical bit error rate of two users"

用户序号	L	P_e（m）
用户序号	L	$E s N 0$ = 0 dB	$E s N 0$ = 5 dB	$E s N 0$ = 10 dB	$E s N 0$ = 15 dB
1	32	0.161 2	0.082 4	0.033 3	0.008 4
1	64	0.006 4	0.003 3	0.000 7	0.000 1
2	32	0.237 3	0.184 3	0.121 7	0.052 2
2	64	0.076 8	0.032 6	0.008 1	0.000 9

Table 1

Fig.2

Fig.3

Fig.4

References 17

1	MAHMOUD H H H， AMER A A， ISMAIL T ．6G：a comprehensive survey on technologies，applications，challenges，and research problems［J］．Transactions on Emerging Telecommunications Technologies，2021，32（4）：e4233/1-14.
2	STRINATI E C， ALEXANDROPOULOS G C， WYMEERSCH H，et al ．Reconfigurable，intelligent，and sustainable wireless environments for 6G smart connectivity［J］．IEEE Communications Magazine，2021，59（10）：99-105.
3	BHOWAL A， AÏSSA S， KSHETRIMAYUM R S ．RIS-assisted advanced spatial modulation techniques for ambient backscattering communications［J］．IEEE Transactions on Green Communications and Networking，2021，5（4）：1684-1696.
4	张广驰，乐文英，庞海舰，等．IRS辅助认知无线携能通信网络的发射功率最小化算法［J］．华南理工大学学报（自然科学版），2023，51（3）：110-123.
	ZHANG Guangchi， LE Wenying， PANG Haijian，et al ．Transmit power minimization algorithms for IRS-assisted cognitive simultaneous wireless information and power transfer networks［J］．Journal of South China University of Technology （Natural Science Edition），2023，51（3）：110-123.
5	BASAR E ．Index modulation techniques for 5G wireless networks［J］．IEEE Communications Magazine，2016，54（7）：168-175.
6	MAO T， WANG Q， WANG Z，et al ．Novel index modulation techniques：a survey［J］．IEEE Communications Surveys & Tutorials，2018，21（1）：315-348.
7	DI RENZO M ．Spatial modulation based on reconfigurable antennas：a new air interface for the IoT［C］∥ Proceedings of 2017 IEEE Military Communications Conference．Baltimore：IEEE，2017：495-500.
8	PHAN-HUY D T， KOKAR Y， RACHEDI K，et al ．Single-carrier spatial modulation for the internet of things：design and performance evaluation by using real compact and reconfigurable antennas［J］．IEEE Access，2019，7：18978-18993.
9	NGUYEN VIET D， DI RENZO M， BASAVARAJAPPA V，et al ．Spatial modulation based on reconfigurable antennas：performance evaluation by using the prototype of a reconfigurable antenna［J］．EURASIP Journal on Wireless Communications and Networking，2019，2019：149/1-17.
10	BASAR E， DI RENZO M， DEROSNY J，et al ．Wireless communications through reconfigurable intelligent surfaces［J］．IEEE Access，2019，7：116753-116773.
11	BASAR E ．Reconfigurable intelligent surface-based index modulation：a new beyond MIMO paradigm for 6G［J］．IEEE Transactions on Communications，2020，68（5）：3187-3196.
12	MA T， XIAO Y， LEI X，et al ．Large intelligent surface assisted wireless communications with spatial modulation and antenna selection［J］．IEEE Journal on Selected Areas in Communications，2020，38（11）：2562-2574.
13	CANBILEN A E ．Performance analysis of RIS-assisted SM with I/Q imbalance［J］．Physical Communication，2021，49：101473/1-11.
14	SALAN O， BAYAR F， ILHAN H ．Performance evaluation of RIS-based SSK and SM schemes with perfect and imperfect channel phase estimation over Weibull fading channels［J］．AEU-International Journal of Electronics and Communications，2021，136：153713/1-10.
15	景小荣，马玉丹，万宇，等．基于索引调制的RIS辅助SIMO通信系统信号检测算法［J］．电子与信息学报，2022，44（7）：2382-2391.
	JING Xiaorong， MA Yudan， WAN Yu，et al ．Signal detection algorithm of RIS-assisted SIMO communication system with index modulation［J］．Journal of Electronics & Information Technology，2022，44（7）：2382-2391.
16	ALMOHAMAD A， HASNA M O， ALTHUNIBAT S，et al ．A novel downlink IM-NOMA scheme［J］．IEEE Open Journal of the Communications Society，2021，2：235-244.
17	张诚，王鸿．智能反射面辅助的非正交多址系统高能效传输方案研究［J］．重庆邮电大学学报（自然科学版），2023，35（1）：16-22.
	ZHANG Cheng， WANG Hong ．Research on energy-efficient transmission scheme for IRS-assisted NOMA systems［J］．Journal of Chongqing University of Posts and Telecommunications（Natural Science Edition），2023，35（1）：16-22.

[1]	XU Ken CAI Min HE Xiao-yong. Multi-Stage Operational Amplifier for Broadband Δ-Σ ADC [J]. Journal of South China University of Technology (Natural Science Edition), 2017, 45(1): 42-47.
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[3]	ZHANG Hou-sheng SUN He-xu. Control Strategy of Zero-Sequence Circulating Current for Two Parallel Three-Phase PWM Rectifiers [J]. Journal of South China University of Technology (Natural Science Edition), 2016, 44(8): 32-38,46.
[4]	WU Kai-yuan LIANG Zhuo-yong HE Zu-wei HUANG Xi CHENG Jia. Double-Pulse Multi-Phase Coordinative Control System of High-Power Twin-Wire GMAW [J]. Journal of South China University of Technology (Natural Science Edition), 2016, 44(2): 40-45.
[5]	ZENG Jiang CHEN Hao-ping GU Zhi-peng Huang Hai-ying. Fixed-Frequency Hysteresis Control Based on Optimal Space Vector [J]. Journal of South China University of Technology (Natural Science Edition), 2016, 44(2): 89-96,106.
[6]	Wang Yu Liu Xiang Xie Yun-xiang. Optimization Design of Three-Dimensional Space Vector Pulse-Width Modulation Strategy for Three-Phase Four-Wire System#br# [J]. Journal of South China University of Technology (Natural Science Edition), 2015, 43(8): 21-28.
[7]	Ma Hui Xie Yun-xiang. Single Closed-Loop Control and Neutral-Point Potential Balance Control of Three-Phase Vienna-Type Rectifier#br# [J]. Journal of South China University of Technology (Natural Science Edition), 2015, 43(8): 29-34.
[8]	Tang Xiao Yang Xiang-yu Zhao Shi-wei Liu Yuan-jing. SVPWM Over-Modulation Algorithm Based on 60° Coordinate System [J]. Journal of South China University of Technology (Natural Science Edition), 2014, 42(8): 27-33.
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