Pub Date : 2020-02-01DOI: 10.1109/NCC48643.2020.9056031
A. Saxena, Vaibhav Dhyani, S. Jana, L. Giri
Recent advancement in neuronal imaging leads to accurate measurement of cellular activity after treatment with drugs. However, neuronal activity obtained by dynamic imaging reveals complex pattern with time, the prediction of activity level corresponding to drug level remains challenging. In this context, we apply self organizing map (SOM) to estimate the drug dose according to neuronal activity level in four different time windows. Here we cluster the neuronal activity pattern and classify the activity pattern with drug dose. We also implement supervised SOM to predict the drug dose corresponding to activity pattern. The advantage of using SOM is that it is a great visualization and prediction tool to analyze high-dimensional data onto a low-dimensional (1D or 2D) SOM grid. Such computaional tool can be used to classify unknown neuronal responses according to the extent of drug level present in the system.
{"title":"Application of kohonen-self organizing map to cluster drug induced Ca2+ response in hippocampal neurons at different drug dose","authors":"A. Saxena, Vaibhav Dhyani, S. Jana, L. Giri","doi":"10.1109/NCC48643.2020.9056031","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056031","url":null,"abstract":"Recent advancement in neuronal imaging leads to accurate measurement of cellular activity after treatment with drugs. However, neuronal activity obtained by dynamic imaging reveals complex pattern with time, the prediction of activity level corresponding to drug level remains challenging. In this context, we apply self organizing map (SOM) to estimate the drug dose according to neuronal activity level in four different time windows. Here we cluster the neuronal activity pattern and classify the activity pattern with drug dose. We also implement supervised SOM to predict the drug dose corresponding to activity pattern. The advantage of using SOM is that it is a great visualization and prediction tool to analyze high-dimensional data onto a low-dimensional (1D or 2D) SOM grid. Such computaional tool can be used to classify unknown neuronal responses according to the extent of drug level present in the system.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121080609","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056055
K. Singh, Nagendra Kumar, R. Sinha, Shreyas Ramoji, Sriram Ganapathy
This paper describes the submissions of team Indigo at Indian Institute of Technology Guwahati (IITG) to the NIST 2018 Speaker Recognition Evaluation (SRE18) challenge. These speaker verification (SV) systems are developed for the fixed training condition task in SRE18. The evaluation data in SRE18 is derived from two corpora: (i) Call My Net 2 (CMN2), and (ii) Video Annotation for Speech Technology (VAST). The VAST set is obtained by extracting audio from video having high musical/noisy background. Thus, it helps in assessing the robustness of the SV systems. A number of sub-systems are developed which differ in front-end modeling paradigms, backend classifiers, and suppression of repeating pattern in the data. The fusion of sub-systems is submitted as the primary system which achieved actual detection cost function (actDCF) and equal error rate (EER) of 0.77 and 13.79 %, respectively, on the SRE18 evaluation data. Post-challenge efforts include the domain adaptation of the scores and the voice activity detection using deep neural network. With these enhancements, for the VAST trials, the best single sub-system achieves the relative reductions of 38.4% and 11.6% in actDCF and EER, respectively.
本文描述了印度理工学院古瓦哈蒂(IITG) Indigo团队向NIST 2018年说话人识别评估(SRE18)挑战提交的内容。这些说话人验证(SV)系统是针对SRE18中固定训练条件任务开发的。SRE18中的评价数据来源于两个语料库:(i) Call My Net 2 (CMN2)和(ii) Video Annotation for Speech Technology (VAST)。VAST集合是通过从具有高音乐/噪声背景的视频中提取音频而获得的。因此，它有助于评估SV系统的鲁棒性。开发了许多子系统，这些子系统在前端建模范式、后端分类器和数据中重复模式的抑制方面有所不同。在SRE18评价数据上实现了实际检测成本函数(actDCF)和等错误率(EER)分别为0.77和13.79%，提出了子系统融合作为主要系统。挑战后的工作包括分数的域适应和使用深度神经网络的语音活动检测。通过这些增强，对于VAST试验，最佳单一子系统在actDCF和EER方面分别实现了38.4%和11.6%的相对降低。
{"title":"IITG- Indigo Submissions for NIST 2018 Speaker Recognition Evaluation and Post-Challenge Improvements","authors":"K. Singh, Nagendra Kumar, R. Sinha, Shreyas Ramoji, Sriram Ganapathy","doi":"10.1109/NCC48643.2020.9056055","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056055","url":null,"abstract":"This paper describes the submissions of team Indigo at Indian Institute of Technology Guwahati (IITG) to the NIST 2018 Speaker Recognition Evaluation (SRE18) challenge. These speaker verification (SV) systems are developed for the fixed training condition task in SRE18. The evaluation data in SRE18 is derived from two corpora: (i) Call My Net 2 (CMN2), and (ii) Video Annotation for Speech Technology (VAST). The VAST set is obtained by extracting audio from video having high musical/noisy background. Thus, it helps in assessing the robustness of the SV systems. A number of sub-systems are developed which differ in front-end modeling paradigms, backend classifiers, and suppression of repeating pattern in the data. The fusion of sub-systems is submitted as the primary system which achieved actual detection cost function (actDCF) and equal error rate (EER) of 0.77 and 13.79 %, respectively, on the SRE18 evaluation data. Post-challenge efforts include the domain adaptation of the scores and the voice activity detection using deep neural network. With these enhancements, for the VAST trials, the best single sub-system achieves the relative reductions of 38.4% and 11.6% in actDCF and EER, respectively.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"150 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125889871","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056020
N. Jain, Adrish Banerjee
Visible light communication (VLC) uses run-length limited (RLL) code to avoid flickering and support different dimming ranges. In this paper, we design an error control coding scheme for VLC using polar code as a forward error correction (FEC) code in serial concatenation with an RLL code. We propose to use soft iterative decoding between RLL code and polar code. Extrinsic information transfer (EXIT) chart is also used to illustrate the proposed serial concatenated scheme's iterative decoding behavior. We will show improvement in bit error rate (BER) performance as compared to the hard decoding based polar code proposed in the literature for VLC.
{"title":"On Visible Light Communication Using Soft Cancellation Decoder for Polar Codes","authors":"N. Jain, Adrish Banerjee","doi":"10.1109/NCC48643.2020.9056020","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056020","url":null,"abstract":"Visible light communication (VLC) uses run-length limited (RLL) code to avoid flickering and support different dimming ranges. In this paper, we design an error control coding scheme for VLC using polar code as a forward error correction (FEC) code in serial concatenation with an RLL code. We propose to use soft iterative decoding between RLL code and polar code. Extrinsic information transfer (EXIT) chart is also used to illustrate the proposed serial concatenated scheme's iterative decoding behavior. We will show improvement in bit error rate (BER) performance as compared to the hard decoding based polar code proposed in the literature for VLC.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123719083","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056069
Silpa S. Nair, S. Bhashyam
Beamforming using Discrete Fourier Transform (DFT) based codebook is widely studied for millimeter wave (mmWave) communication systems. This design requires only phase-control for each antenna element and is therefore motivated by the possibility of lower complexity hardware. While this DFT-based design works well for single-user transmission, significant inter-beam interference is generated in multi-user multiple-input multiple-output (MU-MIMO) transmission. Recently, beamforming based on amplitude tapering has been demonstrated even for mmWave systems. The non-uniform amplitude in this design allows the possibility of significantly reducing inter-beam interference at the cost of slightly reducing the main lobe gain. Since the amplitude tapering is fixed and designed offline, the additional implementation complexity is not very high. In this paper, we show that Dolph-Chebyshev and Taylor codebook designs can provide significant improvement in performance over DFT-based codebooks in full-dimension MU-MIMO settings. For the MU-MIMO, we also propose a per-user power allocation algorithm for maximizing the sum rate under total power and rate constraints. The results show that the proposed algorithm gives high sum rates compared to equal power allocation among users. The simulations are carried out under the 3GPP full-dimension MIMO channel model.
{"title":"Non-uniform Amplitude Codebooks for MU-MIMO in Millimeter Wave Systems","authors":"Silpa S. Nair, S. Bhashyam","doi":"10.1109/NCC48643.2020.9056069","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056069","url":null,"abstract":"Beamforming using Discrete Fourier Transform (DFT) based codebook is widely studied for millimeter wave (mmWave) communication systems. This design requires only phase-control for each antenna element and is therefore motivated by the possibility of lower complexity hardware. While this DFT-based design works well for single-user transmission, significant inter-beam interference is generated in multi-user multiple-input multiple-output (MU-MIMO) transmission. Recently, beamforming based on amplitude tapering has been demonstrated even for mmWave systems. The non-uniform amplitude in this design allows the possibility of significantly reducing inter-beam interference at the cost of slightly reducing the main lobe gain. Since the amplitude tapering is fixed and designed offline, the additional implementation complexity is not very high. In this paper, we show that Dolph-Chebyshev and Taylor codebook designs can provide significant improvement in performance over DFT-based codebooks in full-dimension MU-MIMO settings. For the MU-MIMO, we also propose a per-user power allocation algorithm for maximizing the sum rate under total power and rate constraints. The results show that the proposed algorithm gives high sum rates compared to equal power allocation among users. The simulations are carried out under the 3GPP full-dimension MIMO channel model.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115331085","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056066
Mohd Hamza Naim Shaikh, V. Bohara, A. Srivastava
Orthogonal frequency division multiplexing (OFDM) has been a universal choice for modulation scheme for most of the wireless standards such as long-term evolution (LTE). However, OFDM is prone to large out-of-band (OOB) emission due to slower decay of its side-lobes. Weighted overlap and add OFDM (WOLA-OFDM) have been proposed for mitigating the out-of-band (OOB) emission by improving faster sidelobe decay. However, the presence of nonlinear high power amplifier (HPA) worsens the OOB performance of OFDM, even though the windowing reduces the noise floor considerably. In this work, we have proposed an architecture based on digital predistorter (DPD) to reduce the impact of non-linearity in WOLA-OFDM in the presence of HPA. The results show that the stated benefits of WOLA-OFDM can only be attained through employing DPD in the nonlinear WOLA-OFDM systems.
{"title":"Spectral Analysis of a Nonlinear WOLA-OFDM System with DPD","authors":"Mohd Hamza Naim Shaikh, V. Bohara, A. Srivastava","doi":"10.1109/NCC48643.2020.9056066","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056066","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) has been a universal choice for modulation scheme for most of the wireless standards such as long-term evolution (LTE). However, OFDM is prone to large out-of-band (OOB) emission due to slower decay of its side-lobes. Weighted overlap and add OFDM (WOLA-OFDM) have been proposed for mitigating the out-of-band (OOB) emission by improving faster sidelobe decay. However, the presence of nonlinear high power amplifier (HPA) worsens the OOB performance of OFDM, even though the windowing reduces the noise floor considerably. In this work, we have proposed an architecture based on digital predistorter (DPD) to reduce the impact of non-linearity in WOLA-OFDM in the presence of HPA. The results show that the stated benefits of WOLA-OFDM can only be attained through employing DPD in the nonlinear WOLA-OFDM systems.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122537992","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056081
N. Sood, Umesh Bahuguna, P. Sen
This paper describes the design and development of 6 dB microstrip directional coupler at C-band using Defective Ground Structure (DGS). The required defective ground effect has been implemented using floating ground structure along with stubs for optimization of coupling as well as return loss over 200 MHz of bandwidth. This coupler has been used for tracking application in monopulse scan converter with the provision of scanning in azimuth direction. The realized hardware achieves the minimum modulation depth of 75% for the desired frequency band.
{"title":"Design and Development of 6 dB Microstrip Directional Coupler at C-Band Using Defective Ground for Tracking Application","authors":"N. Sood, Umesh Bahuguna, P. Sen","doi":"10.1109/NCC48643.2020.9056081","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056081","url":null,"abstract":"This paper describes the design and development of 6 dB microstrip directional coupler at C-band using Defective Ground Structure (DGS). The required defective ground effect has been implemented using floating ground structure along with stubs for optimization of coupling as well as return loss over 200 MHz of bandwidth. This coupler has been used for tracking application in monopulse scan converter with the provision of scanning in azimuth direction. The realized hardware achieves the minimum modulation depth of 75% for the desired frequency band.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126383442","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056009
Mokkapati Siddharth, Suyash Shah, R. Swaminathan
In this paper, we analyse the outage performance of an adaptive combining scheme for hybrid free space optics (FSO) / radio frequency (RF) system considering both terrestrial communication and uplink satellite communication (SATCOM) scenarios. Adaptive combining involves keeping the FSO link active all the time and activating the RF link based on the quality of the FSO link. The outage analysis has been carried out by modeling the atmospheric turbulence of FSO link using Gamma-Gamma distribution. Further, Nakagami-m and Ricean distributions are used for modeling the small-scale fading of RF link for terrestrial communication and SATCOM scenarios, respectively. The exact expression of outage probability for the adaptive-combining-based hybrid FSO/RF system has been derived. Further, a range for optimum switching threshold has been determined. Asymptotic analysis along with the calculation of diversity gain has also been carried out for both scenarios. The outage performance of adaptive combining scheme is compared with that of hard switching scheme and single-link FSO system.
{"title":"Outage Analysis of Adaptive Combining Scheme for Hybrid FSO/RF Communication","authors":"Mokkapati Siddharth, Suyash Shah, R. Swaminathan","doi":"10.1109/NCC48643.2020.9056009","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056009","url":null,"abstract":"In this paper, we analyse the outage performance of an adaptive combining scheme for hybrid free space optics (FSO) / radio frequency (RF) system considering both terrestrial communication and uplink satellite communication (SATCOM) scenarios. Adaptive combining involves keeping the FSO link active all the time and activating the RF link based on the quality of the FSO link. The outage analysis has been carried out by modeling the atmospheric turbulence of FSO link using Gamma-Gamma distribution. Further, Nakagami-m and Ricean distributions are used for modeling the small-scale fading of RF link for terrestrial communication and SATCOM scenarios, respectively. The exact expression of outage probability for the adaptive-combining-based hybrid FSO/RF system has been derived. Further, a range for optimum switching threshold has been determined. Asymptotic analysis along with the calculation of diversity gain has also been carried out for both scenarios. The outage performance of adaptive combining scheme is compared with that of hard switching scheme and single-link FSO system.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131712727","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9055991
Peeyush Sahay, Ameya Anjarlekar, S. Jain, P. Radhakrishna, V. Gadre
Time domain matched filtering is a classic method used in radar and sonar applications to maximize signal to noise ratio (SNR) gain, estimate time delay, and improve range resolution. Fractional Fourier transform, and fractional Fourier domain matched filtering are used extensively to overcome the drawbacks of time domain matched filtering and are shown to have improved performance for a linear chirp. This paper presents a generalized fractional matched filtering (GFMF) for estimating higher order chirp parameters with known time delay. It is shown to provide SNR gain equivalent to time domain matched filtering. As an application of GFMF, a novel method to minimize SNR gain degradation due to the range-Doppler coupling effect of quadratic chirps is presented. For a higher order chirp with unknown time delay, another method using generalized fractional envelope correlator (GFEC) is proposed, which performs joint estimation of time delay and higher order chirp parameters using a double quadratic chirp.
{"title":"Generalized Fractional Matched Filtering and its Applications","authors":"Peeyush Sahay, Ameya Anjarlekar, S. Jain, P. Radhakrishna, V. Gadre","doi":"10.1109/NCC48643.2020.9055991","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9055991","url":null,"abstract":"Time domain matched filtering is a classic method used in radar and sonar applications to maximize signal to noise ratio (SNR) gain, estimate time delay, and improve range resolution. Fractional Fourier transform, and fractional Fourier domain matched filtering are used extensively to overcome the drawbacks of time domain matched filtering and are shown to have improved performance for a linear chirp. This paper presents a generalized fractional matched filtering (GFMF) for estimating higher order chirp parameters with known time delay. It is shown to provide SNR gain equivalent to time domain matched filtering. As an application of GFMF, a novel method to minimize SNR gain degradation due to the range-Doppler coupling effect of quadratic chirps is presented. For a higher order chirp with unknown time delay, another method using generalized fractional envelope correlator (GFEC) is proposed, which performs joint estimation of time delay and higher order chirp parameters using a double quadratic chirp.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127658526","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056054
T. K. Das, Rupa Samyuktha Kotla, S. Behera
This paper investigates a modified inscribed square fractal antenna dedicated to wideband wireless applications. The proposed antenna consists of a fractal monopole radiator with a defected ground structure fabricated on a low-cost FR4 epoxy substrate. A prototype has been fabricated to verify the wide operating band of the proposed design (5 GHz-13.7 GHz). The simulated 2D radiation patterns exhibit omnidirectional characteristics throughout the wide operating band. The proposed design is having a dimension of 0.32λ × 0.21λ × 0.026λ(A represents the wavelength at the lowest cutoff frequency) and is found compact related to some recent designs. With the peak realized gain of 5.23 dBi, the proposed design can be suitable for ISM band, WLAN, X-band, and UWB applications.
{"title":"Design of a Modified Inscribed Square Fractal Antenna for Wideband Wireless Applications","authors":"T. K. Das, Rupa Samyuktha Kotla, S. Behera","doi":"10.1109/NCC48643.2020.9056054","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056054","url":null,"abstract":"This paper investigates a modified inscribed square fractal antenna dedicated to wideband wireless applications. The proposed antenna consists of a fractal monopole radiator with a defected ground structure fabricated on a low-cost FR4 epoxy substrate. A prototype has been fabricated to verify the wide operating band of the proposed design (5 GHz-13.7 GHz). The simulated 2D radiation patterns exhibit omnidirectional characteristics throughout the wide operating band. The proposed design is having a dimension of 0.32λ × 0.21λ × 0.026λ(A represents the wavelength at the lowest cutoff frequency) and is found compact related to some recent designs. With the peak realized gain of 5.23 dBi, the proposed design can be suitable for ISM band, WLAN, X-band, and UWB applications.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115661731","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 : 2020-02-01DOI: 10.1109/NCC48643.2020.9056082
Naveenta Gautam, Brejesh Lall
Forward error correcting (FEC) codes are used to improve the reliability of digital communication systems. They introduce redundancy in the signal which helps the receiver to correct errors without requesting for re transmission. FEC codes can be classified into two categories: Convolutional codes and linear block codes (LBCs). Reed-Solomon (RS) codes lie in the category of LBCs. For non-cooperative communication applications such as adaptive modulation and coding (AMC), military applications and cognitive radio, the channel encoder has to be identified blindly for decoding the received signal. In this study, we propose a scheme for blind identification of convolutional and RS codes. We have used the pattern recognition properties of a neural network (NN) to identify the encoder from a candidate set. NNs have not been used for this purpose, to the best of our knowledge. Performance of the proposed classifier has been evaluated for both the noiseless and the noisy case. To show the application of the proposed approach we present the performance results for the two most common use cases namely the terrestrial wireless and the satellite communication channels. Experimental results have shown that the proposed classifier can identify the encoder with high accuracy in low signal-to-noise ratio.
{"title":"Blind Channel Coding Identification of Convolutional encoder and Reed-Solomon encoder using Neural Networks","authors":"Naveenta Gautam, Brejesh Lall","doi":"10.1109/NCC48643.2020.9056082","DOIUrl":"https://doi.org/10.1109/NCC48643.2020.9056082","url":null,"abstract":"Forward error correcting (FEC) codes are used to improve the reliability of digital communication systems. They introduce redundancy in the signal which helps the receiver to correct errors without requesting for re transmission. FEC codes can be classified into two categories: Convolutional codes and linear block codes (LBCs). Reed-Solomon (RS) codes lie in the category of LBCs. For non-cooperative communication applications such as adaptive modulation and coding (AMC), military applications and cognitive radio, the channel encoder has to be identified blindly for decoding the received signal. In this study, we propose a scheme for blind identification of convolutional and RS codes. We have used the pattern recognition properties of a neural network (NN) to identify the encoder from a candidate set. NNs have not been used for this purpose, to the best of our knowledge. Performance of the proposed classifier has been evaluated for both the noiseless and the noisy case. To show the application of the proposed approach we present the performance results for the two most common use cases namely the terrestrial wireless and the satellite communication channels. Experimental results have shown that the proposed classifier can identify the encoder with high accuracy in low signal-to-noise ratio.","PeriodicalId":183772,"journal":{"name":"2020 National Conference on Communications (NCC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114485328","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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