Pub Date : 2012-05-16DOI: 10.1109/ECTICON.2012.6254354
C. Ekkaravarodome, Netiwut Buree, K. Jirasereeamornkul
This paper proposed an electronic ballast that uses an input current shaper to reduce the total harmonic distortion of the line input current, that only process a small part of the total power. Base on the minimum value of the conduction angle to satisfy the requirements of the IEC 61000-3-2 Class-C standard, the conduction loss of the ICS stage can be reduced. The input current shaper is achieved by using a bridge rectifier which acts as the Class-DE resonant rectifier. By using this topology the conduction angle of the diode can be increased to high enough for satisfy the IEC 61000-3-2 Class-C standard requirements. The proposed electronic ballast is designed for 36-W fluorescent lamp and operated at a line rms voltage of 220 V, a line frequency of 50 Hz with the switching frequency fixed at about 76 kHz. The experimental results show that the total harmonic distortion is 29.5%, the power factor is 0.96, a lamp-current crest factor is 1.42, and 95.2% efficiency at full power.
{"title":"An input current shaper using a Class-DE rectifier to meet IEC 61000-3-2 Class-C standard processing a small part of the total power","authors":"C. Ekkaravarodome, Netiwut Buree, K. Jirasereeamornkul","doi":"10.1109/ECTICON.2012.6254354","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254354","url":null,"abstract":"This paper proposed an electronic ballast that uses an input current shaper to reduce the total harmonic distortion of the line input current, that only process a small part of the total power. Base on the minimum value of the conduction angle to satisfy the requirements of the IEC 61000-3-2 Class-C standard, the conduction loss of the ICS stage can be reduced. The input current shaper is achieved by using a bridge rectifier which acts as the Class-DE resonant rectifier. By using this topology the conduction angle of the diode can be increased to high enough for satisfy the IEC 61000-3-2 Class-C standard requirements. The proposed electronic ballast is designed for 36-W fluorescent lamp and operated at a line rms voltage of 220 V, a line frequency of 50 Hz with the switching frequency fixed at about 76 kHz. The experimental results show that the total harmonic distortion is 29.5%, the power factor is 0.96, a lamp-current crest factor is 1.42, and 95.2% efficiency at full power.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"48 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91055275","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254334
P. Punthumast, Y. Auttawaitkul, W. Chiracharit, K. Chamnongthai
In this paper, digital image analysis is applied for non-destructive classification of rice and sticky rice seeds that are mixed together. It is a difficult task because of the similar surface color of the seeds. This paper presents an automatic classification method based on RGB color features. Hardware of image capturing is designed using back light source in order to maximize the contrast between the rice seeds and their background. RGB histogram is then calculated. The rule of classification between rice seed and sticky rice seed are created. Almost 97% of rice seeds are identified correctly. The correct classification rates for two rice varieties are: rice seeds `Jasmine' 96.34% and sticky rice seeds 100%.
{"title":"Non-destructive Identification of unmilled rice using digital image analysis","authors":"P. Punthumast, Y. Auttawaitkul, W. Chiracharit, K. Chamnongthai","doi":"10.1109/ECTICON.2012.6254334","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254334","url":null,"abstract":"In this paper, digital image analysis is applied for non-destructive classification of rice and sticky rice seeds that are mixed together. It is a difficult task because of the similar surface color of the seeds. This paper presents an automatic classification method based on RGB color features. Hardware of image capturing is designed using back light source in order to maximize the contrast between the rice seeds and their background. RGB histogram is then calculated. The rule of classification between rice seed and sticky rice seed are created. Almost 97% of rice seeds are identified correctly. The correct classification rates for two rice varieties are: rice seeds `Jasmine' 96.34% and sticky rice seeds 100%.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"6 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88848198","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254314
K. Sterckx
When modulated with a continuous signal, the intensity of light emitted by a Light Emitting Diode needs to be adjusted such that linearity is maintained between the modulating voltage and the intensity of the emitted light. This paper presents a low-cost solution that is able to maintain linearity over virtually the entire intensity range. Extending the range of linearity is accomplished by incorporating a feedback loop that compensates for the non-linear parameters of the circuit's active components, including the LED. The technique is applied to convert a commercially available LED spotlight into a device that allows for the transmission of continuous Visible Light Communication schemes.
{"title":"Implementation of continuous VLC modulation schemes on commercial LED spotlights","authors":"K. Sterckx","doi":"10.1109/ECTICON.2012.6254314","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254314","url":null,"abstract":"When modulated with a continuous signal, the intensity of light emitted by a Light Emitting Diode needs to be adjusted such that linearity is maintained between the modulating voltage and the intensity of the emitted light. This paper presents a low-cost solution that is able to maintain linearity over virtually the entire intensity range. Extending the range of linearity is accomplished by incorporating a feedback loop that compensates for the non-linear parameters of the circuit's active components, including the LED. The technique is applied to convert a commercially available LED spotlight into a device that allows for the transmission of continuous Visible Light Communication schemes.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"61 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86038097","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254249
Mai Duc Thong, K. Nakano, Y. Toyoda
This paper is concerned with a method of computing the relative power contribution ratio (PCR) between process variables of a Selective Catalytic Reduction (SCR) system in a steam turbine (ST)-gas turbine (GT) combined cycle power plant. The PCR is used to select process variables in the statistical model of the system to be considered. Firstly, we show a method for computing the PCR using a RBF-ARX-based modeling of the SCR. Next, we demonstrate the effectiveness of the PCR in evaluating the identified system. Finally, we consider about a method for computing PCR for general stationary control systems based on Otomo-Nakagawa-Akaike's method, which is applicable to the above-mentioned SCR systems.
{"title":"On the relative power contribution between process variables of SCR control systems for ST-GT combined cycle power plants","authors":"Mai Duc Thong, K. Nakano, Y. Toyoda","doi":"10.1109/ECTICON.2012.6254249","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254249","url":null,"abstract":"This paper is concerned with a method of computing the relative power contribution ratio (PCR) between process variables of a Selective Catalytic Reduction (SCR) system in a steam turbine (ST)-gas turbine (GT) combined cycle power plant. The PCR is used to select process variables in the statistical model of the system to be considered. Firstly, we show a method for computing the PCR using a RBF-ARX-based modeling of the SCR. Next, we demonstrate the effectiveness of the PCR in evaluating the identified system. Finally, we consider about a method for computing PCR for general stationary control systems based on Otomo-Nakagawa-Akaike's method, which is applicable to the above-mentioned SCR systems.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"7 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89734798","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254124
A. Ngotakun, K-L. Areerak, Kongpan Areerak, A. Srikaew
This paper presents the application of fuzzy logic controller for series active power filter to control the compensating voltage. The instantaneous power theory is used to calculate the reference voltages for harmonic voltage mitigation. The control strategy and the concept of fuzzy logic controller are described in the paper. The Mamdani max-min and the mean of maximum approach are used for the fuzzy inference and the defuzzification method, respectively. The simulation results show that the fuzzy logic controller can control the compensating voltages to achieve the %THD of the source voltages at the point of common coupling under an acceptable range following on the IEEE Std. 519-1992.
{"title":"Control of series active power filter using fuzzy logic controller","authors":"A. Ngotakun, K-L. Areerak, Kongpan Areerak, A. Srikaew","doi":"10.1109/ECTICON.2012.6254124","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254124","url":null,"abstract":"This paper presents the application of fuzzy logic controller for series active power filter to control the compensating voltage. The instantaneous power theory is used to calculate the reference voltages for harmonic voltage mitigation. The control strategy and the concept of fuzzy logic controller are described in the paper. The Mamdani max-min and the mean of maximum approach are used for the fuzzy inference and the defuzzification method, respectively. The simulation results show that the fuzzy logic controller can control the compensating voltages to achieve the %THD of the source voltages at the point of common coupling under an acceptable range following on the IEEE Std. 519-1992.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"10 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88129283","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254197
C. Maneekat, R. Phatthanakun, K. Siangchaew, K. Leksakul
This paper studies on the application of X-ray irradiation from synchrotron light for burnishing head patterning. Feasibility study of SU-8 negative photoresist for AlTiC hard mask in reactive ion etching in CF4 plasma is investigated and compared with chromium and AZ photoresist. X-ray lithography is used to make SU-8 hard mask on AlTiC substrate, while chromium and AZ hard mask are fabricated by UV lithography. The selectivity ratios between the etching rate of AlTiC and hard mask are investigated to estimate the sufficient mask thickness in the standard AlTiC etch depth of 30 μm. The SU-8 selectivity ratio of 4.46 is enough to create the burnishing head pattern with critical dimension error of 0.86% and the standard deviation of 0.065. Experimental results confirm that SU-8 photoresist is suitable if the process requires another material (non metallic) to decrease manufacturing cost and processing time.
{"title":"Patterning of burnishing head using SU-8 hard mask fabricated by deep X-ray lithography","authors":"C. Maneekat, R. Phatthanakun, K. Siangchaew, K. Leksakul","doi":"10.1109/ECTICON.2012.6254197","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254197","url":null,"abstract":"This paper studies on the application of X-ray irradiation from synchrotron light for burnishing head patterning. Feasibility study of SU-8 negative photoresist for AlTiC hard mask in reactive ion etching in CF4 plasma is investigated and compared with chromium and AZ photoresist. X-ray lithography is used to make SU-8 hard mask on AlTiC substrate, while chromium and AZ hard mask are fabricated by UV lithography. The selectivity ratios between the etching rate of AlTiC and hard mask are investigated to estimate the sufficient mask thickness in the standard AlTiC etch depth of 30 μm. The SU-8 selectivity ratio of 4.46 is enough to create the burnishing head pattern with critical dimension error of 0.86% and the standard deviation of 0.065. Experimental results confirm that SU-8 photoresist is suitable if the process requires another material (non metallic) to decrease manufacturing cost and processing time.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"2016 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86580024","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254325
P. Pongsoon, K. Kaemarungsi, Dahmmaet Bunnjaweht
An ultra-wideband (UWB) pulse generator circuit is said to be the heart of any UWB system. However, the pulse generator typically requires an edge-triggered driver that is the essential signal source of any pulse generator. The design of edge-triggered driver circuit influences the amplitude, the pulse repetition, and the width of UWB pulses at the output. In this study, a low cost and low complexity edge-triggered driver circuit is proposed, which creates a square wave with very short rising and falling edges to feed a step recovery diode based pulse generator with cascode pulse shaping circuit. The proposed driver circuit is tuneable by simply changing the crystal oscillator component in the circuit, which results in different pulse repetition frequency for the UWB pulse generator. The measurement results when changing the crystal oscillator from 1MHz to 8MHz showed that the output UWB pulse was a Gaussian pulse with pulse width of 1.87 ns and pulse amplitude of 2.16 Vp.
{"title":"Edge-triggered driver circuit for ultra-wideband pulse generator with cascode impulse shaping","authors":"P. Pongsoon, K. Kaemarungsi, Dahmmaet Bunnjaweht","doi":"10.1109/ECTICON.2012.6254325","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254325","url":null,"abstract":"An ultra-wideband (UWB) pulse generator circuit is said to be the heart of any UWB system. However, the pulse generator typically requires an edge-triggered driver that is the essential signal source of any pulse generator. The design of edge-triggered driver circuit influences the amplitude, the pulse repetition, and the width of UWB pulses at the output. In this study, a low cost and low complexity edge-triggered driver circuit is proposed, which creates a square wave with very short rising and falling edges to feed a step recovery diode based pulse generator with cascode pulse shaping circuit. The proposed driver circuit is tuneable by simply changing the crystal oscillator component in the circuit, which results in different pulse repetition frequency for the UWB pulse generator. The measurement results when changing the crystal oscillator from 1MHz to 8MHz showed that the output UWB pulse was a Gaussian pulse with pulse width of 1.87 ns and pulse amplitude of 2.16 Vp.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"29 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87065297","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254225
S. Panyai, A. Thanachayanont
This paper describes the design and realization of a process and temperature compensated CMOS ring oscillator. The proposed circuit employs a current-starved ring oscillator with a compensated bias circuit, which generates an adaptive control voltage to maintain a fixed oscillation frequency against temperature and process variations. Simulation results using process parameters from a 0.18-μm CMOS technology and 1.8-V power supply voltage showed that the worst-case frequency variation of 4.49% and 2.29% could be obtained at the oscillation frequencies of 100 MHz and 150 MHz, respectively, over the temperature range of - 40°C to 125°C. The overall circuit consumes 437μW at 100MHz and 537μW at 150MHz.
{"title":"Design and realization of a process and temperature compensated CMOS ring oscillator","authors":"S. Panyai, A. Thanachayanont","doi":"10.1109/ECTICON.2012.6254225","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254225","url":null,"abstract":"This paper describes the design and realization of a process and temperature compensated CMOS ring oscillator. The proposed circuit employs a current-starved ring oscillator with a compensated bias circuit, which generates an adaptive control voltage to maintain a fixed oscillation frequency against temperature and process variations. Simulation results using process parameters from a 0.18-μm CMOS technology and 1.8-V power supply voltage showed that the worst-case frequency variation of 4.49% and 2.29% could be obtained at the oscillation frequencies of 100 MHz and 150 MHz, respectively, over the temperature range of - 40°C to 125°C. The overall circuit consumes 437μW at 100MHz and 537μW at 150MHz.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"4 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87165639","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254287
N. Saimai, C. Tantibundhit, C. Onsuwan, N. Thatphithakkul
Enhancement of speech perception is a crucial aspect for cochlear implant (CI) technology. In a tonal language such as Thai, with segments (consonants and vowels) and supra-segments (tones), many crucial acoustic cues are to be taken into account for speech processing strategy, i.e., amplitude envelopes and temporal fine structure. This paper presents a new speech synthesis algorithm for CI, which combines an amplitude envelope extraction by the continuous interleaved sampling (CIS) strategy and a temporal fine structure extraction to construct carrier signals, and to use them for amplitude modulation based on each band's envelope. Synthesized initial phonemes using three different algorithms (Fu et al., Chen and Zhang, and the proposed algorithm) with six-band speech processor were evaluated by eight native Thais with normal hearing. The results show that the proposed algorithm produces the most significant improvement in speech intelligibility of the initial phonemes compared to the other algorithms. This suggests a possibility of using the proposed algorithm for CI devices, specifically designed for tonal languages such as Thai, to improve speech perception in CI patients.
语音感知的增强是人工耳蜗技术的一个重要方面。在像泰语这样的声调语言中，有音段(辅音和元音)和超音段(音调)，语音处理策略需要考虑许多关键的声学线索，即振幅包络和时间精细结构。本文提出了一种新的CI语音合成算法，该算法结合了连续交错采样(CIS)策略的幅度包络提取和时间精细结构提取来构造载波信号，并将其用于基于每个频带包络的幅度调制。采用三种不同的算法(Fu et al.， Chen and Zhang，以及所提出的算法)和六波段语音处理器对8名听力正常的泰国人进行合成初始音素的评价。结果表明，与其他算法相比，该算法对初始音素的语音可理解性有最显著的提高。这表明将所提出的算法用于CI设备的可能性，专门为声调语言(如泰语)设计，以改善CI患者的语音感知。
{"title":"Speech synthesis algorithm for Thai cochlear implants","authors":"N. Saimai, C. Tantibundhit, C. Onsuwan, N. Thatphithakkul","doi":"10.1109/ECTICON.2012.6254287","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254287","url":null,"abstract":"Enhancement of speech perception is a crucial aspect for cochlear implant (CI) technology. In a tonal language such as Thai, with segments (consonants and vowels) and supra-segments (tones), many crucial acoustic cues are to be taken into account for speech processing strategy, i.e., amplitude envelopes and temporal fine structure. This paper presents a new speech synthesis algorithm for CI, which combines an amplitude envelope extraction by the continuous interleaved sampling (CIS) strategy and a temporal fine structure extraction to construct carrier signals, and to use them for amplitude modulation based on each band's envelope. Synthesized initial phonemes using three different algorithms (Fu et al., Chen and Zhang, and the proposed algorithm) with six-band speech processor were evaluated by eight native Thais with normal hearing. The results show that the proposed algorithm produces the most significant improvement in speech intelligibility of the initial phonemes compared to the other algorithms. This suggests a possibility of using the proposed algorithm for CI devices, specifically designed for tonal languages such as Thai, to improve speech perception in CI patients.","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"40 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77733766","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 : 2012-05-16DOI: 10.1109/ECTICON.2012.6254118
R. Punchalard, A. Nosan
This paper presents an alternative method to generate the digital frequency modulation (FM) signal. By summing an information signal m(k) with the oscillating frequency ω0 and putting the result into the cosine function of digital oscillator coefficient which is −2 cos (ω0 +m(k)), the FM signal is obtained. Computer simulations are conducted to show the validity of the proposed FM signal generator
本文提出了一种产生数字调频(FM)信号的方法。将信息信号m(k)与振荡频率ω0相加，代入数字振荡器系数的余弦函数- 2 cos (ω0 +m(k))，得到调频信号。计算机仿真验证了所提出的调频信号发生器的有效性
{"title":"Frequency modulation using digital sinusoidal oscillator","authors":"R. Punchalard, A. Nosan","doi":"10.1109/ECTICON.2012.6254118","DOIUrl":"https://doi.org/10.1109/ECTICON.2012.6254118","url":null,"abstract":"This paper presents an alternative method to generate the digital frequency modulation (FM) signal. By summing an information signal m(k) with the oscillating frequency ω0 and putting the result into the cosine function of digital oscillator coefficient which is −2 cos (ω0 +m(k)), the FM signal is obtained. Computer simulations are conducted to show the validity of the proposed FM signal generator","PeriodicalId":6319,"journal":{"name":"2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology","volume":"72 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2012-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80437080","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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