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Proceedings of ICCS '94最新文献

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A class of constant envelope multi-dimensional modulation schemes for non-linearly amplified channels 一类非线性放大信道的恒包络多维调制方案
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474095
S. Drakul, E. Biglieri
{"title":"A class of constant envelope multi-dimensional modulation schemes for non-linearly amplified channels","authors":"S. Drakul, E. Biglieri","doi":"10.1109/ICCS.1994.474095","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474095","url":null,"abstract":"A new class of modulation schemes, called 8D-CEMS (8 dimensional constant envelope modulation scheme), with constant envelope of the modulated signal, for digital radio communications over non-linearly amplified channels is introduced. Computer simulation results show that these modulation schemes lead to significant performance improvement on non-linearly amplified channel, as required in most commercial satellite and terrestrial microwave systems. In particular, we show how to generate an 8D-CEMS that allows one to achieve a bit-error rate of P/sub be/=10/sup -4/ at E/sub b//N/sub 0/=9 dB with spectral efficiency 3 bits/s/Hz.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124410273","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}
引用次数: 4
A subband echo cancellation system 子带回波消除系统
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474156
H. Meana, M. Miyatake, L.O. Balbuena, A.M. Gonzalez, G. D. Sanchez
{"title":"A subband echo cancellation system","authors":"H. Meana, M. Miyatake, L.O. Balbuena, A.M. Gonzalez, G. D. Sanchez","doi":"10.1109/ICCS.1994.474156","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474156","url":null,"abstract":"A short delay subband echo canceler structure is proposed. The proposed structure is based on computing two errors, one for using during single-talk and the other one for using during double-talk. With the subband echo canceler structure we propose a time varying step size LMS algorithm, which reduces distortion during double-talk without increasing the computational cost nor decreasing the convergence rate of the conventional normalized LMS algorithm. Simulation results using white noise and actual speech signals are given to show the desirable features of proposed scheme.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114647688","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}
引用次数: 2
Generalised short-time Hartley transforms for speech processing 语音处理的广义短时哈特利变换
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474276
J.P. Agbinga, D. J. Mclean
{"title":"Generalised short-time Hartley transforms for speech processing","authors":"J.P. Agbinga, D. J. Mclean","doi":"10.1109/ICCS.1994.474276","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474276","url":null,"abstract":"This paper addresses the problem of reducing the complexity involved in computing large discrete Hartley transforms with N-1 degrees of freedom, by first computing short-time transforms with M samples (M>N) and then using this to compute the full transform of length N samples. We present a solution to the problem as it relates to discrete Hartley transforms (DHTs). Short-time Hartley transforms are derived and simplified in terms of type-I DHTs for which efficient fast algorithms exist. We also give further simplifications of type-IV in terms of type-II, and type-III in terms of type-I DHTs.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121359656","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}
引用次数: 4
A new control scheme for multimedia personal LANs 一种新的多媒体个人局域网控制方案
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474255
Tu Dong-Yuan, K. Hasegawa, E. Rashid, M. Fukase, T. Nakamura
{"title":"A new control scheme for multimedia personal LANs","authors":"Tu Dong-Yuan, K. Hasegawa, E. Rashid, M. Fukase, T. Nakamura","doi":"10.1109/ICCS.1994.474255","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474255","url":null,"abstract":"This paper presents a new control scheme to realize concurrent transmission for multi-users in multimedia communication on token ring local area networks (LANs). When a token arrives-at a station continuously transmitting a frame to another station, the station will insert a control pattern called insertion pattern IP to the data field of the frame. A destination station will detect such a pattern and release a new token to the ring. Thereby, concurrent transmissions between stations can be performed. Simulation results show that the scheme has better performance than that of conventional token rings.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122912548","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}
引用次数: 0
The performance of coded hopped multilevel DPSK on a fading mobile satellite channel with interference 有干扰的衰落移动卫星信道上编码跳多电平DPSK的性能
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474185
P. Wittke, Y. M. Lam, P.J. Elliott
{"title":"The performance of coded hopped multilevel DPSK on a fading mobile satellite channel with interference","authors":"P. Wittke, Y. M. Lam, P.J. Elliott","doi":"10.1109/ICCS.1994.474185","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474185","url":null,"abstract":"The results of the error performance of trellis and convolutionally coded slow frequency-hopped spread spectrum systems are presented, as might be encountered in mobile or cellular applications. The particular hopped modulation is /spl pi//M-shifted, M-ary differential phase shift keying (/spl pi//M-DMPSK) with differential detection and a maximum metric decoding, with M=2, 4, and 8. The channel is subject to flat Rician fading and the faded component may have a Doppler frequency shift due to vehicle motion. A union Chernoff bound on error performance is evaluated for the usual additive white Gaussian noise channel, and in addition with multiple access interference due to other users. A system simulation has been carried out in which the effects of implementation parameters in the decoder have been examined.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114267039","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}
引用次数: 0
A study of the resolvability of vector-sensor array in direction-of-arrival estimation 矢量传感器阵列在到达方向估计中的可分辨性研究
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474112
K. Ho, Kah-Chye Tan, W. Ser
{"title":"A study of the resolvability of vector-sensor array in direction-of-arrival estimation","authors":"K. Ho, Kah-Chye Tan, W. Ser","doi":"10.1109/ICCS.1994.474112","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474112","url":null,"abstract":"We first study a theorem on the relationship among linear dependence of steering vectors, correlation among signals, and the number of signals whose DOAs are uniquely determinable, derived by Wax et al. (1989) and Nehorai et al. (see Signal Proc., vol.10, no.3, p.327-342, 1991) for a class of scalar-sensor arrays. We then extend the theorem to include all scalar-sensor arrays, as well as vector-sensor arrays. Subsequently, we show that the DOAs of 2 uncorrelated signals can be uniquely determined with one electromagnetic vector sensor. However, it may be impossible to determine uniquely the DOAs of 2 fully correlated signals. Finally, we establish a relationship between uniqueness in measurements and uniqueness in MUSIC estimates, and conduct DOA estimation experiments using MUSIC to gain a feel of the reliability of our theoretical prediction.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129949813","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}
引用次数: 3
Studying the performance of multiple trellis coded modulation (MTCM) using bounding techniques 研究了基于边界技术的多格编码调制(MTCM)的性能
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474093
T. P. Choo, K.H. Li, V. Dubey
{"title":"Studying the performance of multiple trellis coded modulation (MTCM) using bounding techniques","authors":"T. P. Choo, K.H. Li, V. Dubey","doi":"10.1109/ICCS.1994.474093","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474093","url":null,"abstract":"The performance of a multiple trellis coded modulation (MTCM) in an additive white Gaussian noise (AWGN) channel and a Rician fading channel is investigated, using bounding techniques. We show how error bounds can be calculated for MTCM. Finally, the results obtained using these bounds were found to be consistent with the results reported in other publications.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130316775","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}
引用次数: 2
Artificial neural network approach for vegetation classification from synthetic aperture radar images 基于人工神经网络的合成孔径雷达图像植被分类
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474114
K. Venkataraman, C.S. Lee
{"title":"Artificial neural network approach for vegetation classification from synthetic aperture radar images","authors":"K. Venkataraman, C.S. Lee","doi":"10.1109/ICCS.1994.474114","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474114","url":null,"abstract":"This paper deals with the utilisation of artificial neural network to classify vegetation from highly nonlinear time varying backscatter parameters from the canopies and plants. The paper describes the backscatter phenomenon and their relevance with various types of plants and their constituents. An attempt is made to simulate and train an artificial NN package with the backscattering power experimentally obtained for two classes of vegetation, viz walnut orchard and coniferous forest, for a back propagation algorithm. The paper discusses the results achieved which is fairly accurate with reasonable elapsed time for the training. Further analysis of the simulated packages using Migraines software is underway.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123854114","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}
引用次数: 0
Pulse position modulation for optically amplified passive optical networks 光放大无源光网络的脉冲位置调制
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474087
R. Cryan, A. Phillips, J. Senior
{"title":"Pulse position modulation for optically amplified passive optical networks","authors":"R. Cryan, A. Phillips, J. Senior","doi":"10.1109/ICCS.1994.474087","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474087","url":null,"abstract":"The implications of using pulse position modulation over a passive optical network (PON) are considered. PONs employing optical power amplifiers are likely to become standard so the placement of an erbium doped fibre amplifier (EDFA) at the head end is assumed. We consider the possibility of reaching the maximum number of subscribers at a given bit-rate (STM-1) in the downstream direction while not concerning ourselves overmuch with the services to be provided. For the purposes of the analysis presented we consider the single wavelength case only. We present mathematical analysis for such systems employing an on-off keyed non-return to zero (OOK NRZ) binary modulation regime and a PPM regime, and thus demonstrate that PPM holds a significant advantage over OOK NRZ in terms of the reachable number of customers when the same average source laser power is employed.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123238548","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}
引用次数: 1
A L-band vehicle mounted cylindrical array for satellite communications 用于卫星通信的l波段车载圆柱形阵列
Proceedings of ICCS '94 Pub Date : 1994-11-14 DOI: 10.1109/ICCS.1994.474172
S. T. Jellett, M. Bialkowski, R.S. Varnes
{"title":"A L-band vehicle mounted cylindrical array for satellite communications","authors":"S. T. Jellett, M. Bialkowski, R.S. Varnes","doi":"10.1109/ICCS.1994.474172","DOIUrl":"https://doi.org/10.1109/ICCS.1994.474172","url":null,"abstract":"With the launch of the Optus B series satellite, Australia will be one of the first countries in the world to implement a mobile satellite communications service. A land vehicle satellite communications system is described that will allow users access to public communication networks from anywhere within the country.<<ETX>>","PeriodicalId":158681,"journal":{"name":"Proceedings of ICCS '94","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123681144","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}
引用次数: 7
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