In this paper, we propose an adaptive modulation method for IEEE 802.11aa GCR Block Ack. The method is based on AARF to reduce the transfer delay of all receiver terminals. Generally, in order to enable all receiver terminals to receive data, communication speed and the number of retransmissions are adjusted to a receiver terminal with the worst communication state. However, with such the simple strategy, the receiver terminal with the best communication state may suffer delay. We conduct a computer simulation of audio and video transmission. We then perform a subjective experiment to show that adaptive communication speed and the number of retransmissions can enhance QoE under the situation in which the receiver terminals have different distances from the access point.
{"title":"An Adaptive Modulation Method with IEEE 802.11aa GCR Block Ack for QoE Enhancement of Audio-Video Reliable Groupcast","authors":"Toshiro Nunome, Kenya Mizutani","doi":"10.1109/WSCE49000.2019.9041015","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041015","url":null,"abstract":"In this paper, we propose an adaptive modulation method for IEEE 802.11aa GCR Block Ack. The method is based on AARF to reduce the transfer delay of all receiver terminals. Generally, in order to enable all receiver terminals to receive data, communication speed and the number of retransmissions are adjusted to a receiver terminal with the worst communication state. However, with such the simple strategy, the receiver terminal with the best communication state may suffer delay. We conduct a computer simulation of audio and video transmission. We then perform a subjective experiment to show that adaptive communication speed and the number of retransmissions can enhance QoE under the situation in which the receiver terminals have different distances from the access point.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131448400","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}
The propose was to design the protection of the accident by Ad-Hoc network for Intelligent Automobile by wireless system and processing by microcontroller (Arduino UNO R3). This system design for warning the construction on the street, studying how to writing the microcontroller and studying the wireless transmission cycle by the microcontroller is the controller. The wireless transmission module is LORA (SX127S/SX1276) for connection the warning model to the vehicle, the system has global positioning satellite: GPS (ATGM336H) for focusing the position of the vehicle. The result of the experiment to speed 60 - 90 kilometers per hour and the both of have the mistake 4% of connecting to Wi-Fi. The warning voice when the vehicle nearly to the accident place and this system show the distance information between 200 meters to 1,000 meters at the sparker in the vehicle before found the obstacle or the accident on the street. In conclusion, the system can use in the real situation and can protect the accident by more than 98 %. In the future in the traffic system and the automobile has this system to the standard device in every vehicle.
本课题是通过无线系统和微控制器(Arduino UNO R3)处理，设计智能汽车Ad-Hoc网络的事故防护。本系统是为了对街道上的建筑进行报警而设计的，研究了单片机的编写，并研究了单片机作为控制器的无线传输周期。无线传输模块为LORA (SX127S/SX1276)，用于将预警模型连接到车辆，系统具有全球定位卫星:GPS (ATGM336H)，用于聚焦车辆的位置。实验的结果是，以每小时60 - 90公里的速度上网，两者都有4%的错误连接到Wi-Fi。当车辆接近事故地点时发出警告声音，该系统在发现障碍物或街道上的事故之前，在车辆的火花处显示200米至1000米之间的距离信息。综上所述，该系统可以应用于实际情况，事故防护率达98%以上。在未来的交通系统和汽车中每辆车上都有这个系统的标准装置。
{"title":"The Intelligent Automobile Applied a Vehicular Ad-Hoc Network by the microcontroller","authors":"Sappasit Thongmee, N. Pornsuwancharoen","doi":"10.1109/WSCE49000.2019.9040979","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9040979","url":null,"abstract":"The propose was to design the protection of the accident by Ad-Hoc network for Intelligent Automobile by wireless system and processing by microcontroller (Arduino UNO R3). This system design for warning the construction on the street, studying how to writing the microcontroller and studying the wireless transmission cycle by the microcontroller is the controller. The wireless transmission module is LORA (SX127S/SX1276) for connection the warning model to the vehicle, the system has global positioning satellite: GPS (ATGM336H) for focusing the position of the vehicle. The result of the experiment to speed 60 - 90 kilometers per hour and the both of have the mistake 4% of connecting to Wi-Fi. The warning voice when the vehicle nearly to the accident place and this system show the distance information between 200 meters to 1,000 meters at the sparker in the vehicle before found the obstacle or the accident on the street. In conclusion, the system can use in the real situation and can protect the accident by more than 98 %. In the future in the traffic system and the automobile has this system to the standard device in every vehicle.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132431286","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}
The agricultural sector in the Philippines is important in economic development. It helps supply crop products to the community and provides major employment in rural areas. But lately, the farmers are facing problems due to the low in price value of crops produced locally because of high importation from the neighboring Asian countries. Most farmers belong to the marginal sector of the community and sometimes given less importance in government support. Thus, the demand for food products escalates as the population increases. Another is the lifestyle and awareness of people which affect the food demand the consumer eats every day. The local market is mostly located in trading post areas and primarily serve as places where farmers can meet with traders to sell their products. This develops a potential market for domestic consumption to have a better quality of farm products produced delivered to them.The development of Agricultural Technology of Negros Occidental (AgriTechNo), an agricultural product forecasting system application helps the farmers in deciding where to market their product and assess the price value available in the market that is monitored in the trading post.
{"title":"AGRITECHNO: A Development of a Revolutionized Farmer Assisted Agricultural Product Forecasting Mobile App System","authors":"J. Dormido, A. Malicdem","doi":"10.1109/WSCE49000.2019.9040978","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9040978","url":null,"abstract":"The agricultural sector in the Philippines is important in economic development. It helps supply crop products to the community and provides major employment in rural areas. But lately, the farmers are facing problems due to the low in price value of crops produced locally because of high importation from the neighboring Asian countries. Most farmers belong to the marginal sector of the community and sometimes given less importance in government support. Thus, the demand for food products escalates as the population increases. Another is the lifestyle and awareness of people which affect the food demand the consumer eats every day. The local market is mostly located in trading post areas and primarily serve as places where farmers can meet with traders to sell their products. This develops a potential market for domestic consumption to have a better quality of farm products produced delivered to them.The development of Agricultural Technology of Negros Occidental (AgriTechNo), an agricultural product forecasting system application helps the farmers in deciding where to market their product and assess the price value available in the market that is monitored in the trading post.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114540089","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}
In the remote robot systems using haptic communication under communication delays, there is a problem of instability of operations or behaviors. For solving the problem, we have introduced a method using “resistance” which is proportion to the velocity and investigated the theoretical method to analyze the mechanism by using difference differential equation. However, in the former investigation, we have focused on the motion of approach to target position and mechanical howling has not been analyzed adequately. This paper shows the possibility of explanation of mechanical howling by using difference differential equation and investigates the stability condition from the view point of characteristic equation. As a result, we shew that the resistance has the effect of narrowing the stability range for approaching target position but enlarging the stability range for mechanical howling. Moreover, empirical data is examined by the method.
{"title":"A Stability Analysis of Haptic Systems by Using Difference Diffrential Equation From the view point of characteristic equation","authors":"Hitoshi Watanabe, Y. Ishibashi, Pingguo Huang","doi":"10.1109/WSCE49000.2019.9041038","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041038","url":null,"abstract":"In the remote robot systems using haptic communication under communication delays, there is a problem of instability of operations or behaviors. For solving the problem, we have introduced a method using “resistance” which is proportion to the velocity and investigated the theoretical method to analyze the mechanism by using difference differential equation. However, in the former investigation, we have focused on the motion of approach to target position and mechanical howling has not been analyzed adequately. This paper shows the possibility of explanation of mechanical howling by using difference differential equation and investigates the stability condition from the view point of characteristic equation. As a result, we shew that the resistance has the effect of narrowing the stability range for approaching target position but enlarging the stability range for mechanical howling. Moreover, empirical data is examined by the method.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128488827","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}
In this research, a novel design of quad-band (28/38/60/73 GHz) multiple-input multiple-output (MIMO) antenna for fifth-generation (5G) communications. The proposed antenna has the dimension of 22$times$ 22 $times$ 0.787${mm}^{3}$. The single-element antenna consists of a modified T-shaped patch with slit an elliptical-slot on the elliptical-patch of the circular-slot bottom ground. The results demonstrate that the proposed design has high isolation with mutual coupling $(lt -20$ dB) and has an omnidirectional radiation pattern. Also, the proposed antenna provides high diversity performance in terms of envelope correlation coefficient (ECC $lt 0.003$ dB), diversity gain (DG $gt 9.98$ dB), mean effective gain (MEG $lt 3$ dB), and channel capacity loss (CCL $lt 0.4$ bits/s/Hz) which ensure its effectiveness MIMO performance for 5G wireless applications.
{"title":"A Quad-Band 4 × 4 MIMO Antenna Array for Millimeter-Wave 5G Communications","authors":"N. Supreeyatitikul, N. Teerasuttakorn, P. Boontamchauy, Somsak Manman","doi":"10.1109/WSCE49000.2019.9041119","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041119","url":null,"abstract":"In this research, a novel design of quad-band (28/38/60/73 GHz) multiple-input multiple-output (MIMO) antenna for fifth-generation (5G) communications. The proposed antenna has the dimension of 22$times$ 22 $times$ 0.787${mm}^{3}$. The single-element antenna consists of a modified T-shaped patch with slit an elliptical-slot on the elliptical-patch of the circular-slot bottom ground. The results demonstrate that the proposed design has high isolation with mutual coupling $(lt -20$ dB) and has an omnidirectional radiation pattern. Also, the proposed antenna provides high diversity performance in terms of envelope correlation coefficient (ECC $lt 0.003$ dB), diversity gain (DG $gt 9.98$ dB), mean effective gain (MEG $lt 3$ dB), and channel capacity loss (CCL $lt 0.4$ bits/s/Hz) which ensure its effectiveness MIMO performance for 5G wireless applications.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127874114","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}
The purpose of this study was to review the spatial planning directionality and themes for future studies of Smart Home and, through literature analysis and to analyzes the effect of the change of Internet of Things (IoT) informatization paradigm on the characteristics and structure of Smart Home. This study also reclassifies Smart Home's spatial planning elements by considering the interaction between intelligent services, intelligent technology, users and space. The contents of spatial planning directionality corresponding to the results of this study are composed of the establishment of the main functions of the Smart Home considering the trend of IoT technology, the integrated approach to various plan elements constituting the Smart Home, and the necessity of user-centered space design.
{"title":"Spatial Design Direction of Smart Home in IoT Paradigm","authors":"Soojung Chang, K. Nam","doi":"10.1109/WSCE49000.2019.9041130","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041130","url":null,"abstract":"The purpose of this study was to review the spatial planning directionality and themes for future studies of Smart Home and, through literature analysis and to analyzes the effect of the change of Internet of Things (IoT) informatization paradigm on the characteristics and structure of Smart Home. This study also reclassifies Smart Home's spatial planning elements by considering the interaction between intelligent services, intelligent technology, users and space. The contents of spatial planning directionality corresponding to the results of this study are composed of the establishment of the main functions of the Smart Home considering the trend of IoT technology, the integrated approach to various plan elements constituting the Smart Home, and the necessity of user-centered space design.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125413475","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}
Electrocardiogram is a widely used method in every hospital for identifying the heart condition of the patient. To obtain successful diagnosis, the analysis performed on the signal should be accurate. Hence, in this paper we proposed a modified algorithm for denoising powerline and baseline noise in electrocardiogram signals. The filtering algorithm was modified such as cubic splining was used to modify conventional Empirical Wavelet Transform (EWT) and soft thresholding for the Discrete Wavelet Transform (DWT). The effectiveness of the proposed method was tested in two manners. One is by using the records from Physiobank ATM database ECG recordings, and the other is by using the threelead ECG device to measure the ECG signal from the patient. IoT Maker 1000 FPGA was used for the signal processing since it is intended to be the starting design for a fog-computing server for local processing of ECG signals in a mobile medical service system. An average of 4.69 dB SNR improvement has been achieved using the proposed method of denoising, which proves higher compared to other existing methods such as DWT (2.63dB) and EWT (4.52dB). Based on two-factor ANOVA test, the researchers claimed that the proposed method has a significant difference compared with the other two filtering algorithms. The hardware implementation of the proposed algorithm was successfully achieved and the result is visually comparable to an industrial ECG machine.
{"title":"FPGA Based Powerline and Baseline Interference Removal in Electrocardiogram Using Modified EWT-DWT Filtering","authors":"Mae M. Garcillanosa, A. Flores, S. Jala, Airah Josua P. Toleza","doi":"10.1109/WSCE49000.2019.9041050","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041050","url":null,"abstract":"Electrocardiogram is a widely used method in every hospital for identifying the heart condition of the patient. To obtain successful diagnosis, the analysis performed on the signal should be accurate. Hence, in this paper we proposed a modified algorithm for denoising powerline and baseline noise in electrocardiogram signals. The filtering algorithm was modified such as cubic splining was used to modify conventional Empirical Wavelet Transform (EWT) and soft thresholding for the Discrete Wavelet Transform (DWT). The effectiveness of the proposed method was tested in two manners. One is by using the records from Physiobank ATM database ECG recordings, and the other is by using the threelead ECG device to measure the ECG signal from the patient. IoT Maker 1000 FPGA was used for the signal processing since it is intended to be the starting design for a fog-computing server for local processing of ECG signals in a mobile medical service system. An average of 4.69 dB SNR improvement has been achieved using the proposed method of denoising, which proves higher compared to other existing methods such as DWT (2.63dB) and EWT (4.52dB). Based on two-factor ANOVA test, the researchers claimed that the proposed method has a significant difference compared with the other two filtering algorithms. The hardware implementation of the proposed algorithm was successfully achieved and the result is visually comparable to an industrial ECG machine.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126097872","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}
In the process of PD(Partial Discharge) signal denoising, wavelet threshold denoising and CEEMD (Complete Ensemble Empirical Mode Decomposition) denoising have problems of effective signal loss leading to waveform distortion and insufficient adaptability. A PD signal denoising method based on CEEMD-wavelet threshold is proposed. The denoising principle of the method is introduced in detail. The advantage of this method is that not only the noise in the PD pulse signal is effectively removed, but also the integrity of the effective PD signal is well preserved. According to the denoising effect of the simulated PD signal and the experimental PD signal, and the obvious advantages of the proposed method in terms of signal-to-noise ratio and amplitude error, the validity and reliability of the proposed method are verified.
{"title":"Partial Discharge Denoising Method for Switchgear Based on CEEMD-Wavelet Threshold","authors":"Li Haifei, Huangfu Guofang, Zhang Qingwei, Chu Houcheng, Z. Wenqiang","doi":"10.1109/WSCE49000.2019.9040974","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9040974","url":null,"abstract":"In the process of PD(Partial Discharge) signal denoising, wavelet threshold denoising and CEEMD (Complete Ensemble Empirical Mode Decomposition) denoising have problems of effective signal loss leading to waveform distortion and insufficient adaptability. A PD signal denoising method based on CEEMD-wavelet threshold is proposed. The denoising principle of the method is introduced in detail. The advantage of this method is that not only the noise in the PD pulse signal is effectively removed, but also the integrity of the effective PD signal is well preserved. According to the denoising effect of the simulated PD signal and the experimental PD signal, and the obvious advantages of the proposed method in terms of signal-to-noise ratio and amplitude error, the validity and reliability of the proposed method are verified.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"43 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134327481","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}
Reliable transmission and long lifetime are our main goals for wireless body sensor networks (WBSNs). Due to the mobility of the human body, the network topology often changes, and the problem of node connection interruption is inevitable. To solve the problem, the Relay Selection and Interruption Processing (RSIP) scheme is proposed in this paper. It established a function of the residual energy and the historical transmission success rate of each node to select the relay node forwarding data to implement dynamic routing transmission. Also, an interrupt processing algorithm in RSIP is used to deal with the connection interruption problem storing data, delaying forwarding data, dropping data when timeout, and finding more reliable relay nodes. The simulation results show that the RSIP scheme extends the lifetime by approximately 12.4%, 20.8%, and 35.5% compared with the CLDO scheme, the JRP scheme, and the EERP scheme respectively, as well as it has higher throughput rate than these three schemes under non-bad situations.
{"title":"RSIP: Relay Selection and Interruption Processing Scheme to Enhance QoS of WBSN","authors":"Yinghong Liu, Yuanming Wu, Jianyu Chang","doi":"10.1109/WSCE49000.2019.9041145","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041145","url":null,"abstract":"Reliable transmission and long lifetime are our main goals for wireless body sensor networks (WBSNs). Due to the mobility of the human body, the network topology often changes, and the problem of node connection interruption is inevitable. To solve the problem, the Relay Selection and Interruption Processing (RSIP) scheme is proposed in this paper. It established a function of the residual energy and the historical transmission success rate of each node to select the relay node forwarding data to implement dynamic routing transmission. Also, an interrupt processing algorithm in RSIP is used to deal with the connection interruption problem storing data, delaying forwarding data, dropping data when timeout, and finding more reliable relay nodes. The simulation results show that the RSIP scheme extends the lifetime by approximately 12.4%, 20.8%, and 35.5% compared with the CLDO scheme, the JRP scheme, and the EERP scheme respectively, as well as it has higher throughput rate than these three schemes under non-bad situations.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129958869","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}
In this paper, the design of sinusoidal oscillator which generates two output voltages with 90° degree phase difference is presented. The design procedure is started from the function block diagram to proposed oscillator using commercially available ICs. The proposed oscillator is constructed from three OTAs, one voltage summing circuit, one grounded resistor and two grounded capacitors. The frequency of the generated sinusoidal waveform is electronically and linearly controlled without disturbing the condition for oscillating of the system. With this feature, the proposed oscillator is used to generates the frequency modulation (FM) signal. The magnitude of the quadrature voltage waveform is equal during adjusting the generated frequency. A Pspice simulation and experiment are done to verify the performance of the proposed circuit. The macro models of available ICs, LM13700 and AD830 are employed for simulation. The simulation and experimental results confirm theory well as expected.
{"title":"Design of Electronically Controllable Quadrature Sinusoidal Oscillator with Linear Control of Frequency","authors":"W. Jaikla, P. Suwanjan, A. Chaichana, R. Sotner","doi":"10.1109/WSCE49000.2019.9041085","DOIUrl":"https://doi.org/10.1109/WSCE49000.2019.9041085","url":null,"abstract":"In this paper, the design of sinusoidal oscillator which generates two output voltages with 90° degree phase difference is presented. The design procedure is started from the function block diagram to proposed oscillator using commercially available ICs. The proposed oscillator is constructed from three OTAs, one voltage summing circuit, one grounded resistor and two grounded capacitors. The frequency of the generated sinusoidal waveform is electronically and linearly controlled without disturbing the condition for oscillating of the system. With this feature, the proposed oscillator is used to generates the frequency modulation (FM) signal. The magnitude of the quadrature voltage waveform is equal during adjusting the generated frequency. A Pspice simulation and experiment are done to verify the performance of the proposed circuit. The macro models of available ICs, LM13700 and AD830 are employed for simulation. The simulation and experimental results confirm theory well as expected.","PeriodicalId":153298,"journal":{"name":"2019 2nd World Symposium on Communication Engineering (WSCE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130327764","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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