Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998130
Luo Senwen, Wang Zhizhong, Wang Huagang, Chen Shaochuan
Electromagnetic radiation safety of 5G base stations has been widely concerned by society and the public due to the accelerated development. This paper analyzes the electromagnetic radiation propagation characteristics of 5G mMIMO beam-forming, and monitors the field radiation level of the low-frequency 5G(Sub 6G) base station which co-constructed and shared by China Telecom and China Unicom in-situ real time, also studies and assesses the electromagnetic radiation safety of 5G co-construction and sharing network according to the international and China’s 5G electromagnetic radiation limit standards.
{"title":"Research on Electromagnetic Radiation Safety Assessment of Co-construction and Sharing 5G Network","authors":"Luo Senwen, Wang Zhizhong, Wang Huagang, Chen Shaochuan","doi":"10.1109/ICCIS56375.2022.9998130","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998130","url":null,"abstract":"Electromagnetic radiation safety of 5G base stations has been widely concerned by society and the public due to the accelerated development. This paper analyzes the electromagnetic radiation propagation characteristics of 5G mMIMO beam-forming, and monitors the field radiation level of the low-frequency 5G(Sub 6G) base station which co-constructed and shared by China Telecom and China Unicom in-situ real time, also studies and assesses the electromagnetic radiation safety of 5G co-construction and sharing network according to the international and China’s 5G electromagnetic radiation limit standards.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130385194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998137
Chen Li, Jing Zhang, Chunhua Wang, Yaqiong Fan
Nowadays, the rapid development of Internet technology drives the advance of the big data era, and along with the widespread use of smart devices and social media, multimedia data is growing explosively. With the increasingly complex and diverse needs of information exchange, collection and storage, the types of information have also evolved from traditional text information to diverse data forms such as pictures and video and audio, bringing different degrees of convenience to people's work and life and other scenarios. However, the huge amount of multimedia data also makes information storage and retrieval more cumbersome. How to realize the effective storage and efficient retrieval of data, so as to better utilize the value of multimedia data, is one of the challenges that academia and information industry are tackling nowadays. In this paper, we study the cross-media retrieval technology of text and image by Contrastive Language-Image Pre-training model based on natural language processing method. The cross-media pre-training idea proposed in this paper can be applied not only to text-image processing, but also theoretically to mutual retrieval of modal information of video and audio, etc.
{"title":"The Design and Research of Cross-media Retrieval","authors":"Chen Li, Jing Zhang, Chunhua Wang, Yaqiong Fan","doi":"10.1109/ICCIS56375.2022.9998137","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998137","url":null,"abstract":"Nowadays, the rapid development of Internet technology drives the advance of the big data era, and along with the widespread use of smart devices and social media, multimedia data is growing explosively. With the increasingly complex and diverse needs of information exchange, collection and storage, the types of information have also evolved from traditional text information to diverse data forms such as pictures and video and audio, bringing different degrees of convenience to people's work and life and other scenarios. However, the huge amount of multimedia data also makes information storage and retrieval more cumbersome. How to realize the effective storage and efficient retrieval of data, so as to better utilize the value of multimedia data, is one of the challenges that academia and information industry are tackling nowadays. In this paper, we study the cross-media retrieval technology of text and image by Contrastive Language-Image Pre-training model based on natural language processing method. The cross-media pre-training idea proposed in this paper can be applied not only to text-image processing, but also theoretically to mutual retrieval of modal information of video and audio, etc.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122177543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998153
Jian Yang, Danfeng Zhao, Hai Tian, Haoxiang Jia, Tongzhou Han
In order to meet the requirements of high reliability and high flexibility of wireless communication, the Space-coupled Low-Density Parity-Check (SC-LDPC) codes are deeply studied. At present, the main research direction of SC-LDPC codes is to reduce the complexity of the algorithm and reduce the occupation of decoding resources. In terms of hardware implementation, there is relatively little research. Therefore, in view of the above problems, considering hardware resource occupation and coding and decoding performance, the FPGA design and implementation of the SC-LDPC code codec are carried out, and the functional correctness test is carried out on the Xilinx xc7k325tffg900-2 chip.
{"title":"Decoder Implementation of Spatially Coupled LDPC Codes","authors":"Jian Yang, Danfeng Zhao, Hai Tian, Haoxiang Jia, Tongzhou Han","doi":"10.1109/ICCIS56375.2022.9998153","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998153","url":null,"abstract":"In order to meet the requirements of high reliability and high flexibility of wireless communication, the Space-coupled Low-Density Parity-Check (SC-LDPC) codes are deeply studied. At present, the main research direction of SC-LDPC codes is to reduce the complexity of the algorithm and reduce the occupation of decoding resources. In terms of hardware implementation, there is relatively little research. Therefore, in view of the above problems, considering hardware resource occupation and coding and decoding performance, the FPGA design and implementation of the SC-LDPC code codec are carried out, and the functional correctness test is carried out on the Xilinx xc7k325tffg900-2 chip.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115987011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998146
Lizeng Gong, Shanshan Xie, Yan Zhang, Yanjiao Xiong, Xiaoyan Wang, Jun Yu Li
Along with the development of data scale and the high complexity of sound signals, feature extraction and classification methods of sound signals have become a major research hotspot. However, the current sound signal feature extraction methods are difficult to accurately and stably provide a high-precision classification effect for the sound signal due to the complex frequency distribution and the influence of noise. Therefore, a robust feature extraction method for sound signals based on multi-scale and multi-directional Gabor filters and Mel frequency cepstral coefficient (MtWGM) was proposed. This method performs preprocessing on the signal by mixing hard threshold and soft threshold wavelet denoising. The Gabor filter is used to the combined energy spectrum of the framed signal, to achieve the effect of relatively more balanced intra-class features and more prominent inter-class features, and finally improve the noise reduction performance and classification accuracy of sound signals. The experiments are conducted out on three different sound signal datasets. Three classifiers are trained to test the effectiveness of extracted features. The experimental results show that the proposed multiple wavelet Gabor_MFCC (MtWGM) method has obtained better classification accuracy and robustness than that of MFCC.
{"title":"A Robust Feature Extraction Method for Sound Signals Based on Gabor and MFCC","authors":"Lizeng Gong, Shanshan Xie, Yan Zhang, Yanjiao Xiong, Xiaoyan Wang, Jun Yu Li","doi":"10.1109/ICCIS56375.2022.9998146","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998146","url":null,"abstract":"Along with the development of data scale and the high complexity of sound signals, feature extraction and classification methods of sound signals have become a major research hotspot. However, the current sound signal feature extraction methods are difficult to accurately and stably provide a high-precision classification effect for the sound signal due to the complex frequency distribution and the influence of noise. Therefore, a robust feature extraction method for sound signals based on multi-scale and multi-directional Gabor filters and Mel frequency cepstral coefficient (MtWGM) was proposed. This method performs preprocessing on the signal by mixing hard threshold and soft threshold wavelet denoising. The Gabor filter is used to the combined energy spectrum of the framed signal, to achieve the effect of relatively more balanced intra-class features and more prominent inter-class features, and finally improve the noise reduction performance and classification accuracy of sound signals. The experiments are conducted out on three different sound signal datasets. Three classifiers are trained to test the effectiveness of extracted features. The experimental results show that the proposed multiple wavelet Gabor_MFCC (MtWGM) method has obtained better classification accuracy and robustness than that of MFCC.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126831023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Refer to Service-Based Architecture (SBA) and slicing service structure, 5G provides data transmission services for Industrial Internet. The vertical deployment of Industrial Internet requires tighter integration of 5G network and power grids’ data service. To this end, a unified modeling scheme of IEC 61850 services and 5G communication service is designed. Secondly, the service requirements of the power grids’ data service are distinguished from the timing dimension and the reliability dimension, and the transmission mode of the data service is reorganized. Finally, the queue scheduling and buffer control are proposed, and the 5G slice and 5G QoS Identifier (5QI) are matched.
5G借鉴SBA (service - based Architecture)和切片式业务结构，为工业互联网提供数据传输服务。工业互联网的垂直部署要求5G网络与电网数据业务的融合更加紧密。为此，设计了IEC 61850业务与5G通信业务的统一建模方案。其次，将电网数据业务的业务需求从时序维度和可靠性维度进行区分，并对数据业务的传输方式进行重组;最后，提出了队列调度和缓冲控制，并匹配了5G分片和5G QoS标识符(5QI)。
{"title":"A Data Service System for Power Grids’ 5G Network","authors":"Xin Xu, Xuebo Deng, Li-Xin Zhao, Gaofeng Yang, Xinyu Liu, Xian Qin, Shukai Hu","doi":"10.1109/ICCIS56375.2022.9998158","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998158","url":null,"abstract":"Refer to Service-Based Architecture (SBA) and slicing service structure, 5G provides data transmission services for Industrial Internet. The vertical deployment of Industrial Internet requires tighter integration of 5G network and power grids’ data service. To this end, a unified modeling scheme of IEC 61850 services and 5G communication service is designed. Secondly, the service requirements of the power grids’ data service are distinguished from the timing dimension and the reliability dimension, and the transmission mode of the data service is reorganized. Finally, the queue scheduling and buffer control are proposed, and the 5G slice and 5G QoS Identifier (5QI) are matched.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131848288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998167
Longjie Yu, Xinrong An
A multi band integrated antenna scheme for the fifth generation (5G) mobile phone is proposed, that is, one antenna integrates five bands, namely Global Positioning System (GPS) Level 1 (L1), GPS Level 5 (L5), Wi-Fi 2.4G, Wi-Fi 5G and Long Term Evolution (LTE) band 32, the antenna volume for the whole mobile phone is effectively saved. This five-in-one antenna is located in the upper left corner of the back of the mobile phone, the upper clearance and side clearance of mobile phone are 1mm and 0.2mm respectively. The size of five-in-one antenna is 38.5mm by 26mm. The form of five-in-one antenna is combining inverted F antenna (IFA) and parasitism. This antenna is radiated by metal frame and laser direct structring (LDS), measurement results show that, passive efficiency in free space of GPS L1, GPS L5, Wi-Fi 2.4G, Wi-Fi 5G and LTE Band 32 could reach -4.5dB, -8.5dB, -6dB, -4.5dB, -6.5dB respectively, also the specific absorption rate (SAR) value of the transmission band is lower than Federal Communications Commission (FCC) specification. A mobile phone equipped with this five-in-one antenna has been commercially shipped.
{"title":"A Novel Multi-Band Integrated Antenna Design in 5G Full Screen Mobile Phone","authors":"Longjie Yu, Xinrong An","doi":"10.1109/ICCIS56375.2022.9998167","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998167","url":null,"abstract":"A multi band integrated antenna scheme for the fifth generation (5G) mobile phone is proposed, that is, one antenna integrates five bands, namely Global Positioning System (GPS) Level 1 (L1), GPS Level 5 (L5), Wi-Fi 2.4G, Wi-Fi 5G and Long Term Evolution (LTE) band 32, the antenna volume for the whole mobile phone is effectively saved. This five-in-one antenna is located in the upper left corner of the back of the mobile phone, the upper clearance and side clearance of mobile phone are 1mm and 0.2mm respectively. The size of five-in-one antenna is 38.5mm by 26mm. The form of five-in-one antenna is combining inverted F antenna (IFA) and parasitism. This antenna is radiated by metal frame and laser direct structring (LDS), measurement results show that, passive efficiency in free space of GPS L1, GPS L5, Wi-Fi 2.4G, Wi-Fi 5G and LTE Band 32 could reach -4.5dB, -8.5dB, -6dB, -4.5dB, -6.5dB respectively, also the specific absorption rate (SAR) value of the transmission band is lower than Federal Communications Commission (FCC) specification. A mobile phone equipped with this five-in-one antenna has been commercially shipped.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"8 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114033281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998149
Han Zhang, Dazhuan Xu, Meng Sun, Jingjing Pan
This paper proposes a limit-achievable joint range and direction of arrival estimation method in pulse-Doppler radar, named sampling a posteriori (SAP). To evaluate the performance of the SAP, entropy error is introduced and it is proved that the empirical entropy error of the SAP achieves the theoretical entropy error when the number of snapshots tends to infinity. In order to reduce the computation burden of the SAP, a relaxation technique is adopted, which is based on a random number generator and the cumulative distribution function. Numerical simulation is carried out and results indicate that the relaxation technique can effectively reduce the computation burden of SAP at the cost of a insignificant estimation performance loss.
{"title":"A Limit-Achievable Estimator for Range and Doppler Estimation in Pulse-Doppler Radar","authors":"Han Zhang, Dazhuan Xu, Meng Sun, Jingjing Pan","doi":"10.1109/ICCIS56375.2022.9998149","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998149","url":null,"abstract":"This paper proposes a limit-achievable joint range and direction of arrival estimation method in pulse-Doppler radar, named sampling a posteriori (SAP). To evaluate the performance of the SAP, entropy error is introduced and it is proved that the empirical entropy error of the SAP achieves the theoretical entropy error when the number of snapshots tends to infinity. In order to reduce the computation burden of the SAP, a relaxation technique is adopted, which is based on a random number generator and the cumulative distribution function. Numerical simulation is carried out and results indicate that the relaxation technique can effectively reduce the computation burden of SAP at the cost of a insignificant estimation performance loss.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116007114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/iccis56375.2022.9998133
{"title":"ICCIS 2022 Cover Page","authors":"","doi":"10.1109/iccis56375.2022.9998133","DOIUrl":"https://doi.org/10.1109/iccis56375.2022.9998133","url":null,"abstract":"","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116318062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998161
Shejie Lu, Siping Hu, Yuntao Duan, Jinfeng Gao, Fang Liu
The IEEE 802.11 MAC layer lacks the limitation of QoS guarantee, and the current research and improvement of IEEE 802.11 differentiated services are mostly based on single rate, and rarely consider the research in the case of multi-rate. Aiming at this situation, this paper analyzes the IEEE 802.11 protocol mechanism in depth., and established a multi-rate IEEE 802.11 protocol model. Based on this, a IEEE 802.11 differentiated service solution is proposed: dynamic timeslot base on probability of channel access (DTPCA). By detecting the network information, the strategy can update the network node-related protocol parameters adaptively in real time, which can effectively realize the multi-rate differentiated service performance and improve the system throughput at the same time. Through theoretical analysis and detailed simulation experiments, the effectiveness of the proposed strategy is confirmed. Moreover, the strategy is easy to control and simple to implement, and it is easy to be applied and promoted in the actual network.
{"title":"Differentiated Services Strategy Based on Time Slot Adaptive Adjustment in IEEE 802.11 Wireless Networks","authors":"Shejie Lu, Siping Hu, Yuntao Duan, Jinfeng Gao, Fang Liu","doi":"10.1109/ICCIS56375.2022.9998161","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998161","url":null,"abstract":"The IEEE 802.11 MAC layer lacks the limitation of QoS guarantee, and the current research and improvement of IEEE 802.11 differentiated services are mostly based on single rate, and rarely consider the research in the case of multi-rate. Aiming at this situation, this paper analyzes the IEEE 802.11 protocol mechanism in depth., and established a multi-rate IEEE 802.11 protocol model. Based on this, a IEEE 802.11 differentiated service solution is proposed: dynamic timeslot base on probability of channel access (DTPCA). By detecting the network information, the strategy can update the network node-related protocol parameters adaptively in real time, which can effectively realize the multi-rate differentiated service performance and improve the system throughput at the same time. Through theoretical analysis and detailed simulation experiments, the effectiveness of the proposed strategy is confirmed. Moreover, the strategy is easy to control and simple to implement, and it is easy to be applied and promoted in the actual network.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127219915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/ICCIS56375.2022.9998154
Shu Cunming, Xie Yulin
Most existing behavioral models of the radio frequency (RF) power amplifiers assume that power amplifiers are memoryless devices. But in broadband communication systems, memory effects of the RF power amplifiers are significantly observed. The traditional memoryless models can no longer accurately depict the input-output relationship of power amplifiers. This paper investigates power amplifiers memory effects and a pre-distortion method is proposed for linearizing RF power amplifiers with memory effects. A valid behavioral model based on the Volterra series is suggested to treat memory effects. Since the characteristics of amplifiers change during transmission time, a recursive least squares algorithm with size- fixed observation matrices is developed to update the parameters of the proposed power amplifiers model. The identification algorithm can decrease computational complexity and data storage space and facilitate real-time online identification. Simultaneously, the pre-distortion model is constructed to simulate. Simulation results show that the proposed method can effectively compensate for the nonlinear distortion and memory effects of RF power amplifiers. The model's accuracy is used to evaluate power amplifiers memory effects by the enormalized mean square error (NMSE). In the end, simulation and evaluation of this pre-distortion system proceeded, and the power spectral density estimation was also applied to calculate the adjacent channel power ratio.
{"title":"A Volterra Pre-distortion Behavioral Modelling for Power Amplifiers with Memory Effects","authors":"Shu Cunming, Xie Yulin","doi":"10.1109/ICCIS56375.2022.9998154","DOIUrl":"https://doi.org/10.1109/ICCIS56375.2022.9998154","url":null,"abstract":"Most existing behavioral models of the radio frequency (RF) power amplifiers assume that power amplifiers are memoryless devices. But in broadband communication systems, memory effects of the RF power amplifiers are significantly observed. The traditional memoryless models can no longer accurately depict the input-output relationship of power amplifiers. This paper investigates power amplifiers memory effects and a pre-distortion method is proposed for linearizing RF power amplifiers with memory effects. A valid behavioral model based on the Volterra series is suggested to treat memory effects. Since the characteristics of amplifiers change during transmission time, a recursive least squares algorithm with size- fixed observation matrices is developed to update the parameters of the proposed power amplifiers model. The identification algorithm can decrease computational complexity and data storage space and facilitate real-time online identification. Simultaneously, the pre-distortion model is constructed to simulate. Simulation results show that the proposed method can effectively compensate for the nonlinear distortion and memory effects of RF power amplifiers. The model's accuracy is used to evaluate power amplifiers memory effects by the enormalized mean square error (NMSE). In the end, simulation and evaluation of this pre-distortion system proceeded, and the power spectral density estimation was also applied to calculate the adjacent channel power ratio.","PeriodicalId":398546,"journal":{"name":"2022 6th International Conference on Communication and Information Systems (ICCIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131283220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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