{"title":"On structural analysis for a class of high-rate convolutional codes","authors":"P. Charnkeitkong, K. Yamaguchi, H. Imai","doi":"10.1109/ICCS.1992.255139","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255139","url":null,"abstract":"The authors perform structural analysis of the class of Xi codes. They conduct the sufficient conditions that let them determine whether a Xi code is also a Xi /sub f/ code or not. It is found that the branch structure of the trellis in the YHM-A (Yamada et al. 1983) for a Xi /sub f/ code is the same as that of the trellis for a punctured convolutional coding (PCC). The authors point out that the PCC can be easily constructed from the trellis of a Xi /sub f/ code. Several Pics of constraint lengths 5,. . ., 12 are constructed from the good Xi /sub f/ codes found in CharnKeitKong et al. (1992). To evaluate the bit error performance of the newly found Pics; the distance spectra of these Pics are calculated.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121737007","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}
{"title":"Multidimensional block coded modulation scheme with Viterbi decoding for Rician fading channels","authors":"Huan-Bang Li, Y. Iwanami, T. Ikeda","doi":"10.1109/ICCS.1992.255090","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255090","url":null,"abstract":"The Viterbi decoding is available through a corresponding trellis. The channel fading information is obtained from periodically inserted pilot symbols. The estimated channel fade is also used to modify the decoding metric. Computer simulation shows good system error performance.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125087783","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}
N. Kamiyama, N. Iijima, A. Taguchi, H. Mitsui, Y. Yoshida, M. Sone
{"title":"Tuning of learning rate and momentum on back-propagation","authors":"N. Kamiyama, N. Iijima, A. Taguchi, H. Mitsui, Y. Yoshida, M. Sone","doi":"10.1109/ICCS.1992.254895","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254895","url":null,"abstract":"It is known well that backpropagation is used in recognition and learning on neural networks. The backpropagation, modification of the weight is calculated by learning rate ( eta =0.2) and momentum ( alpha =0.9). The number of training cycles depends on eta and alpha , so that it is necessary to choose the most suitable values for eta and alpha . Then, changing eta and alpha , the authors tried to search for the most suitable values for the learning. As a result, the combination of eta and alpha given the minimum value of the number of training cycles behave under the constant rule. Thus eta =K(1- alpha ). Moreover, the constant K is decided by the ratio between the number of output units and hidden units or the initialized weight.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121499198","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}
{"title":"Algebraic upper bound of energy constrained M-array codes","authors":"I. Yamada, K. Wattanawong, K. Kurosawa","doi":"10.1109/ICCS.1992.255088","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255088","url":null,"abstract":"For block coded modulations, this paper gives an upper bound of the number of code words subject to the given minimum Euclidean distance and the given average energy. The result is applied to multi-level PSK and ASK signal sets. The bound is derived by generalizing Johnson's bound (1972) for binary constant weight codes.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122860225","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}
{"title":"TCM codes for 4PSK-2PSK modulation with invariance under rotation","authors":"P. Szulakiewicz","doi":"10.1109/ICCS.1992.255085","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255085","url":null,"abstract":"The paper contains an example of designing a 180 degrees rotationally invariant TCM code with 3-dimensional 4PSK-2PSK signal space. All encoder input bits are carried directly to the output. No differential encoder is necessary. This eliminates the error multiplication effect caused by the differential decoding operation in the receiver. Examples are presented for 2, 4, 8, 16 and 32 encoder states. The codes achieve coding gain of 1.76 dB (for 2 encoder states) of 5.44 dB (for 32 encoder states) compared with the uncoded BPSK.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132217439","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}
{"title":"Unequal error protection QPSK modulation codes","authors":"R. Morelos-Zaragoza, Shu Lin","doi":"10.1109/ICCS.1992.255087","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255087","url":null,"abstract":"The authors use binary linear UEP (LUEP) codes, in combination with a QPSK signal set and Gray mapping, to obtain new efficient block QPSK modulation codes with unequal minimum squared Euclidean distances. They give several examples of codes that have the same minimum squared Euclidean distance as the best QPSK modulation codes of the same rate and length. A new suboptimal two-stage soft-decision decoding is applied to LUEP QPSK modulation codes.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133390999","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}
{"title":"A pitch detection algorithm based on time-frequency analysis","authors":"S. Kwong, W. Gang, C.H. Lee","doi":"10.1109/ICCS.1992.254914","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254914","url":null,"abstract":"A new pitch detection algorithm is presented. A new method is developed to lessen the influence of the cross-term on the performance of traditional time-frequency distribution. The relationship between the time-frequency and the traditional autocorrelation method is also discussed. Experimental results show that this new method can give satisfied estimation of pitch period.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115350262","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}
{"title":"Exploiting virtual reality for network management","authors":"A. Lazar, W. Choe, K. Fairchild, N. Hern","doi":"10.1109/ICCS.1992.255116","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255116","url":null,"abstract":"The authors discuss research in the use of virtual-reality technology as a new interface paradigm for monitoring and controlling networks. They describe the prototype system that has been built in support.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115589169","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}
{"title":"Pattern recognition using optical binary perceptron","authors":"N.I. Ansari, M.S. Athreya","doi":"10.1109/ICCS.1992.254887","DOIUrl":"https://doi.org/10.1109/ICCS.1992.254887","url":null,"abstract":"Deals with a technique to expedite the process of pattern recognition by the use of optical Boolean logic. Optical binary perceptrons are implemented by the use of lensless shadow-casting system.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114376127","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}
{"title":"A new GSC beamformer employing DOA estimation and null steering","authors":"M.H. Er, Y. H. Sng","doi":"10.1109/ICCS.1992.255149","DOIUrl":"https://doi.org/10.1109/ICCS.1992.255149","url":null,"abstract":"A new generalized sidelobe canceller (GSC) beamforming structure employing direction-of-arrival (DOA) estimation and null steering technique is presented. It has the advantages that the quiescent response of the beamformer can be closely maintained and that the adaptive dimension of the beamformer can be reduced to about half of that of the full processor. Theoretical justification on the proposed approach is given and the performance achieved is investigated via computer studies.<<ETX>>","PeriodicalId":223769,"journal":{"name":"[Proceedings] Singapore ICCS/ISITA `92","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116145464","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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